Merge tag 'drm-hisilicon-next-2016-11-17' of http://github.com/zourongrong/linux into drm-next

hibmc drm driver for hisilicon.

* tag 'drm-hisilicon-next-2016-11-17' of http://github.com/zourongrong/linux:
  MAINTAINERS: Update HISILICON DRM entries
  drm/hisilicon/hibmc: Add support for vblank interrupt
  drm/hisilicon/hibmc: Add support for VDAC
  drm/hisilicon/hibmc: Add support for display engine
  drm/hisilicon/hibmc: Add support for frame buffer
  drm/hisilicon/hibmc: Add video memory management
  drm/hisilicon/hibmc: Add hisilicon hibmc drm master driver

MAINTAINERS

@@ -4134,6 +4134,7 @@ F:	drivers/gpu/drm/gma500/
 
 DRM DRIVERS FOR HISILICON
 M:	Xinliang Liu <z.liuxinliang@hisilicon.com>
+M:	Rongrong Zou <zourongrong@gmail.com>
 R:	Xinwei Kong <kong.kongxinwei@hisilicon.com>
 R:	Chen Feng <puck.chen@hisilicon.com>
 L:	dri-devel@lists.freedesktop.org

drivers/gpu/drm/hisilicon/Kconfig

@@ -2,4 +2,5 @@
 # hisilicon drm device configuration.
 # Please keep this list sorted alphabetically
 
+source "drivers/gpu/drm/hisilicon/hibmc/Kconfig"
 source "drivers/gpu/drm/hisilicon/kirin/Kconfig"

drivers/gpu/drm/hisilicon/Makefile

@@ -2,4 +2,5 @@
 # Makefile for hisilicon drm drivers.
 # Please keep this list sorted alphabetically
 
+obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc/
 obj-$(CONFIG_DRM_HISI_KIRIN) += kirin/

drivers/gpu/drm/hisilicon/hibmc/Kconfig

+config DRM_HISI_HIBMC
+	tristate "DRM Support for Hisilicon Hibmc"
+	depends on DRM && PCI
+	select DRM_KMS_HELPER
+	select DRM_TTM
+
+	help
+	  Choose this option if you have a Hisilicon Hibmc soc chipset.
+	  If M is selected the module will be called hibmc-drm.

drivers/gpu/drm/hisilicon/hibmc/Makefile

+ccflags-y := -Iinclude/drm
+hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_drm_fbdev.o hibmc_ttm.o
+
+obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc-drm.o

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c

+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_plane_helper.h>
+
+#include "hibmc_drm_drv.h"
+#include "hibmc_drm_regs.h"
+
+struct hibmc_display_panel_pll {
+	unsigned long M;
+	unsigned long N;
+	unsigned long OD;
+	unsigned long POD;
+};
+
+struct hibmc_dislay_pll_config {
+	unsigned long hdisplay;
+	unsigned long vdisplay;
+	u32 pll1_config_value;
+	u32 pll2_config_value;
+};
+
+static const struct hibmc_dislay_pll_config hibmc_pll_table[] = {
+	{800, 600, CRT_PLL1_HS_40MHZ, CRT_PLL2_HS_40MHZ},
+	{1024, 768, CRT_PLL1_HS_65MHZ, CRT_PLL2_HS_65MHZ},
+	{1152, 864, CRT_PLL1_HS_80MHZ_1152, CRT_PLL2_HS_80MHZ},
+	{1280, 768, CRT_PLL1_HS_80MHZ, CRT_PLL2_HS_80MHZ},
+	{1280, 720, CRT_PLL1_HS_74MHZ, CRT_PLL2_HS_74MHZ},
+	{1280, 960, CRT_PLL1_HS_108MHZ, CRT_PLL2_HS_108MHZ},
+	{1280, 1024, CRT_PLL1_HS_108MHZ, CRT_PLL2_HS_108MHZ},
+	{1600, 1200, CRT_PLL1_HS_162MHZ, CRT_PLL2_HS_162MHZ},
+	{1920, 1080, CRT_PLL1_HS_148MHZ, CRT_PLL2_HS_148MHZ},
+	{1920, 1200, CRT_PLL1_HS_193MHZ, CRT_PLL2_HS_193MHZ},
+};
+
+#define PADDING(align, data) (((data) + (align) - 1) & (~((align) - 1)))
+
+static int hibmc_plane_atomic_check(struct drm_plane *plane,
+				    struct drm_plane_state *state)
+{
+	struct drm_framebuffer *fb = state->fb;
+	struct drm_crtc *crtc = state->crtc;
+	struct drm_crtc_state *crtc_state;
+	u32 src_w = state->src_w >> 16;
+	u32 src_h = state->src_h >> 16;
+
+	if (!crtc || !fb)
+		return 0;
+
+	crtc_state = drm_atomic_get_crtc_state(state->state, crtc);
+	if (IS_ERR(crtc_state))
+		return PTR_ERR(crtc_state);
+
+	if (src_w != state->crtc_w || src_h != state->crtc_h) {
+		DRM_DEBUG_ATOMIC("scale not support\n");
+		return -EINVAL;
+	}
+
+	if (state->crtc_x < 0 || state->crtc_y < 0) {
+		DRM_DEBUG_ATOMIC("crtc_x/y of drm_plane state is invalid\n");
+		return -EINVAL;
+	}
+
+	if (state->crtc_x + state->crtc_w >
+	    crtc_state->adjusted_mode.hdisplay ||
+	    state->crtc_y + state->crtc_h >
+	    crtc_state->adjusted_mode.vdisplay) {
+		DRM_DEBUG_ATOMIC("visible portion of plane is invalid\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void hibmc_plane_atomic_update(struct drm_plane *plane,
+				      struct drm_plane_state *old_state)
+{
+	struct drm_plane_state	*state	= plane->state;
+	u32 reg;
+	int ret;
+	u64 gpu_addr = 0;
+	unsigned int line_l;
+	struct hibmc_drm_private *priv = plane->dev->dev_private;
+	struct hibmc_framebuffer *hibmc_fb;
+	struct hibmc_bo *bo;
+
+	if (!state->fb)
+		return;
+
+	hibmc_fb = to_hibmc_framebuffer(state->fb);
+	bo = gem_to_hibmc_bo(hibmc_fb->obj);
+	ret = ttm_bo_reserve(&bo->bo, true, false, NULL);
+	if (ret) {
+		DRM_ERROR("failed to reserve ttm_bo: %d", ret);
+		return;
+	}
+
+	ret = hibmc_bo_pin(bo, TTM_PL_FLAG_VRAM, &gpu_addr);
+	ttm_bo_unreserve(&bo->bo);
+	if (ret) {
+		DRM_ERROR("failed to pin hibmc_bo: %d", ret);
+		return;
+	}
+
+	writel(gpu_addr, priv->mmio + HIBMC_CRT_FB_ADDRESS);
+
+	reg = state->fb->width * (state->fb->bits_per_pixel / 8);
+	/* now line_pad is 16 */
+	reg = PADDING(16, reg);
+
+	line_l = state->fb->width * state->fb->bits_per_pixel / 8;
+	line_l = PADDING(16, line_l);
+	writel(HIBMC_FIELD(HIBMC_CRT_FB_WIDTH_WIDTH, reg) |
+	       HIBMC_FIELD(HIBMC_CRT_FB_WIDTH_OFFS, line_l),
+	       priv->mmio + HIBMC_CRT_FB_WIDTH);
+
+	/* SET PIXEL FORMAT */
+	reg = readl(priv->mmio + HIBMC_CRT_DISP_CTL);
+	reg &= ~HIBMC_CRT_DISP_CTL_FORMAT_MASK;
+	reg |= HIBMC_FIELD(HIBMC_CRT_DISP_CTL_FORMAT,
+			   state->fb->bits_per_pixel / 16);
+	writel(reg, priv->mmio + HIBMC_CRT_DISP_CTL);
+}
+
+static const u32 channel_formats1[] = {
+	DRM_FORMAT_RGB565, DRM_FORMAT_BGR565, DRM_FORMAT_RGB888,
+	DRM_FORMAT_BGR888, DRM_FORMAT_XRGB8888, DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_RGBA8888, DRM_FORMAT_BGRA8888, DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888
+};
+
+static struct drm_plane_funcs hibmc_plane_funcs = {
+	.update_plane	= drm_atomic_helper_update_plane,
+	.disable_plane	= drm_atomic_helper_disable_plane,
+	.set_property = drm_atomic_helper_plane_set_property,
+	.destroy = drm_plane_cleanup,
+	.reset = drm_atomic_helper_plane_reset,
+	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+};
+
+static const struct drm_plane_helper_funcs hibmc_plane_helper_funcs = {
+	.atomic_check = hibmc_plane_atomic_check,
+	.atomic_update = hibmc_plane_atomic_update,
+};
+
+static struct drm_plane *hibmc_plane_init(struct hibmc_drm_private *priv)
+{
+	struct drm_device *dev = priv->dev;
+	struct drm_plane *plane;
+	int ret = 0;
+
+	plane = devm_kzalloc(dev->dev, sizeof(*plane), GFP_KERNEL);
+	if (!plane) {
+		DRM_ERROR("failed to alloc memory when init plane\n");
+		return ERR_PTR(-ENOMEM);
+	}
+	/*
+	 * plane init
+	 * TODO: Now only support primary plane, overlay planes
+	 * need to do.
+	 */
+	ret = drm_universal_plane_init(dev, plane, 1, &hibmc_plane_funcs,
+				       channel_formats1,
+				       ARRAY_SIZE(channel_formats1),
+				       DRM_PLANE_TYPE_PRIMARY,
+				       NULL);
+	if (ret) {
+		DRM_ERROR("failed to init plane: %d\n", ret);
+		return ERR_PTR(ret);
+	}
+
+	drm_plane_helper_add(plane, &hibmc_plane_helper_funcs);
+	return plane;
+}
+
+static void hibmc_crtc_enable(struct drm_crtc *crtc)
+{
+	unsigned int reg;
+	struct hibmc_drm_private *priv = crtc->dev->dev_private;
+
+	hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);
+
+	/* Enable display power gate & LOCALMEM power gate*/
+	reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
+	reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
+	reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
+	reg |= HIBMC_CURR_GATE_LOCALMEM(1);
+	reg |= HIBMC_CURR_GATE_DISPLAY(1);
+	hibmc_set_current_gate(priv, reg);
+	drm_crtc_vblank_on(crtc);
+}
+
+static void hibmc_crtc_disable(struct drm_crtc *crtc)
+{
+	unsigned int reg;
+	struct hibmc_drm_private *priv = crtc->dev->dev_private;
+
+	drm_crtc_vblank_off(crtc);
+
+	hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_SLEEP);
+
+	/* Enable display power gate & LOCALMEM power gate*/
+	reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
+	reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
+	reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
+	reg |= HIBMC_CURR_GATE_LOCALMEM(0);
+	reg |= HIBMC_CURR_GATE_DISPLAY(0);
+	hibmc_set_current_gate(priv, reg);
+}
+
+static unsigned int format_pll_reg(void)
+{
+	unsigned int pllreg = 0;
+	struct hibmc_display_panel_pll pll = {0};
+
+	/*
+	 * Note that all PLL's have the same format. Here,
+	 * we just use Panel PLL parameter to work out the bit
+	 * fields in the register.On returning a 32 bit number, the value can
+	 * be applied to any PLL in the calling function.
+	 */
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_BYPASS, 0);
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_POWER, 1);
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_INPUT, 0);
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_POD, pll.POD);
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_OD, pll.OD);
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_N, pll.N);
+	pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_M, pll.M);
+
+	return pllreg;
+}
+
+static void set_vclock_hisilicon(struct drm_device *dev, unsigned long pll)
+{
+	u32 val;
+	struct hibmc_drm_private *priv = dev->dev_private;
+
+	val = readl(priv->mmio + CRT_PLL1_HS);
+	val &= ~(CRT_PLL1_HS_OUTER_BYPASS(1));
+	writel(val, priv->mmio + CRT_PLL1_HS);
+
+	val = CRT_PLL1_HS_INTER_BYPASS(1) | CRT_PLL1_HS_POWERON(1);
+	writel(val, priv->mmio + CRT_PLL1_HS);
+
+	writel(pll, priv->mmio + CRT_PLL1_HS);
+
+	usleep_range(1000, 2000);
+
+	val = pll & ~(CRT_PLL1_HS_POWERON(1));
+	writel(val, priv->mmio + CRT_PLL1_HS);
+
+	usleep_range(1000, 2000);
+
+	val &= ~(CRT_PLL1_HS_INTER_BYPASS(1));
+	writel(val, priv->mmio + CRT_PLL1_HS);
+
+	usleep_range(1000, 2000);
+
+	val |= CRT_PLL1_HS_OUTER_BYPASS(1);
+	writel(val, priv->mmio + CRT_PLL1_HS);
+}
+
+static void get_pll_config(unsigned long x, unsigned long y,
+			   u32 *pll1, u32 *pll2)
+{
+	int i;
+	int count = ARRAY_SIZE(hibmc_pll_table);
+
+	for (i = 0; i < count; i++) {
+		if (hibmc_pll_table[i].hdisplay == x &&
+		    hibmc_pll_table[i].vdisplay == y) {
+			*pll1 = hibmc_pll_table[i].pll1_config_value;
+			*pll2 = hibmc_pll_table[i].pll2_config_value;
+			return;
+		}
+	}
+
+	/* if found none, we use default value */
+	*pll1 = CRT_PLL1_HS_25MHZ;
+	*pll2 = CRT_PLL2_HS_25MHZ;
+}
+
+/*
+ * This function takes care the extra registers and bit fields required to
+ * setup a mode in board.
+ * Explanation about Display Control register:
+ * FPGA only supports 7 predefined pixel clocks, and clock select is
+ * in bit 4:0 of new register 0x802a8.
+ */
+static unsigned int display_ctrl_adjust(struct drm_device *dev,
+					struct drm_display_mode *mode,
+					unsigned int ctrl)
+{
+	unsigned long x, y;
+	u32 pll1; /* bit[31:0] of PLL */
+	u32 pll2; /* bit[63:32] of PLL */
+	struct hibmc_drm_private *priv = dev->dev_private;
+
+	x = mode->hdisplay;
+	y = mode->vdisplay;
+
+	get_pll_config(x, y, &pll1, &pll2);
+	writel(pll2, priv->mmio + CRT_PLL2_HS);
+	set_vclock_hisilicon(dev, pll1);
+
+	/*
+	 * Hisilicon has to set up the top-left and bottom-right
+	 * registers as well.
+	 * Note that normal chip only use those two register for
+	 * auto-centering mode.
+	 */
+	writel(HIBMC_FIELD(HIBMC_CRT_AUTO_CENTERING_TL_TOP, 0) |
+	       HIBMC_FIELD(HIBMC_CRT_AUTO_CENTERING_TL_LEFT, 0),
+	       priv->mmio + HIBMC_CRT_AUTO_CENTERING_TL);
+
+	writel(HIBMC_FIELD(HIBMC_CRT_AUTO_CENTERING_BR_BOTTOM, y - 1) |
+	       HIBMC_FIELD(HIBMC_CRT_AUTO_CENTERING_BR_RIGHT, x - 1),
+	       priv->mmio + HIBMC_CRT_AUTO_CENTERING_BR);
+
+	/*
+	 * Assume common fields in ctrl have been properly set before
+	 * calling this function.
+	 * This function only sets the extra fields in ctrl.
+	 */
+
+	/* Set bit 25 of display controller: Select CRT or VGA clock */
+	ctrl &= ~HIBMC_CRT_DISP_CTL_CRTSELECT_MASK;
+	ctrl &= ~HIBMC_CRT_DISP_CTL_CLOCK_PHASE_MASK;
+
+	ctrl |= HIBMC_CRT_DISP_CTL_CRTSELECT(HIBMC_CRTSELECT_CRT);
+
+	/* clock_phase_polarity is 0 */
+	ctrl |= HIBMC_CRT_DISP_CTL_CLOCK_PHASE(0);
+
+	writel(ctrl, priv->mmio + HIBMC_CRT_DISP_CTL);
+
+	return ctrl;
+}
+
+static void hibmc_crtc_mode_set_nofb(struct drm_crtc *crtc)
+{
+	unsigned int val;
+	struct drm_display_mode *mode = &crtc->state->mode;
+	struct drm_device *dev = crtc->dev;
+	struct hibmc_drm_private *priv = dev->dev_private;
+	int width = mode->hsync_end - mode->hsync_start;
+	int height = mode->vsync_end - mode->vsync_start;
+
+	writel(format_pll_reg(), priv->mmio + HIBMC_CRT_PLL_CTRL);
+	writel(HIBMC_FIELD(HIBMC_CRT_HORZ_TOTAL_TOTAL, mode->htotal - 1) |
+	       HIBMC_FIELD(HIBMC_CRT_HORZ_TOTAL_DISP_END, mode->hdisplay - 1),
+	       priv->mmio + HIBMC_CRT_HORZ_TOTAL);
+
+	writel(HIBMC_FIELD(HIBMC_CRT_HORZ_SYNC_WIDTH, width) |
+	       HIBMC_FIELD(HIBMC_CRT_HORZ_SYNC_START, mode->hsync_start - 1),
+	       priv->mmio + HIBMC_CRT_HORZ_SYNC);
+
+	writel(HIBMC_FIELD(HIBMC_CRT_VERT_TOTAL_TOTAL, mode->vtotal - 1) |
+	       HIBMC_FIELD(HIBMC_CRT_VERT_TOTAL_DISP_END, mode->vdisplay - 1),
+	       priv->mmio + HIBMC_CRT_VERT_TOTAL);
+
+	writel(HIBMC_FIELD(HIBMC_CRT_VERT_SYNC_HEIGHT, height) |
+	       HIBMC_FIELD(HIBMC_CRT_VERT_SYNC_START, mode->vsync_start - 1),
+	       priv->mmio + HIBMC_CRT_VERT_SYNC);
+
+	val = HIBMC_FIELD(HIBMC_CRT_DISP_CTL_VSYNC_PHASE, 0);
+	val |= HIBMC_FIELD(HIBMC_CRT_DISP_CTL_HSYNC_PHASE, 0);
+	val |= HIBMC_CRT_DISP_CTL_TIMING(1);
+	val |= HIBMC_CRT_DISP_CTL_PLANE(1);
+
+	display_ctrl_adjust(dev, mode, val);
+}
+
+static void hibmc_crtc_atomic_begin(struct drm_crtc *crtc,
+				    struct drm_crtc_state *old_state)
+{
+	unsigned int reg;
+	struct drm_device *dev = crtc->dev;
+	struct hibmc_drm_private *priv = dev->dev_private;
+
+	hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);
+
+	/* Enable display power gate & LOCALMEM power gate*/
+	reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
+	reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
+	reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
+	reg |= HIBMC_CURR_GATE_DISPLAY(1);
+	reg |= HIBMC_CURR_GATE_LOCALMEM(1);
+	hibmc_set_current_gate(priv, reg);
+
+	/* We can add more initialization as needed. */
+}
+
+static void hibmc_crtc_atomic_flush(struct drm_crtc *crtc,
+				    struct drm_crtc_state *old_state)
+
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&crtc->dev->event_lock, flags);
+	if (crtc->state->event)
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+	crtc->state->event = NULL;
+	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
+}
+
+static const struct drm_crtc_funcs hibmc_crtc_funcs = {
+	.page_flip = drm_atomic_helper_page_flip,
+	.set_config = drm_atomic_helper_set_config,
+	.destroy = drm_crtc_cleanup,
+	.reset = drm_atomic_helper_crtc_reset,
+	.atomic_duplicate_state =  drm_atomic_helper_crtc_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+};
+
+static const struct drm_crtc_helper_funcs hibmc_crtc_helper_funcs = {
+	.enable		= hibmc_crtc_enable,
+	.disable	= hibmc_crtc_disable,
+	.mode_set_nofb	= hibmc_crtc_mode_set_nofb,
+	.atomic_begin	= hibmc_crtc_atomic_begin,
+	.atomic_flush	= hibmc_crtc_atomic_flush,
+};
+
+int hibmc_de_init(struct hibmc_drm_private *priv)
+{
+	struct drm_device *dev = priv->dev;
+	struct drm_crtc *crtc;
+	struct drm_plane *plane;
+	int ret;
+
+	plane = hibmc_plane_init(priv);
+	if (IS_ERR(plane)) {
+		DRM_ERROR("failed to create plane: %ld\n", PTR_ERR(plane));
+		return PTR_ERR(plane);
+	}
+
+	crtc = devm_kzalloc(dev->dev, sizeof(*crtc), GFP_KERNEL);
+	if (!crtc) {
+		DRM_ERROR("failed to alloc memory when init crtc\n");
+		return -ENOMEM;
+	}
+
+	ret = drm_crtc_init_with_planes(dev, crtc, plane,
+					NULL, &hibmc_crtc_funcs, NULL);
+	if (ret) {
+		DRM_ERROR("failed to init crtc: %d\n", ret);
+		return ret;
+	}
+
+	ret = drm_mode_crtc_set_gamma_size(crtc, 256);
+	if (ret) {
+		DRM_ERROR("failed to set gamma size: %d\n", ret);
+		return ret;
+	}
+	drm_crtc_helper_add(crtc, &hibmc_crtc_helper_funcs);
+
+	return 0;
+}

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c

+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <linux/console.h>
+#include <linux/module.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "hibmc_drm_drv.h"
+#include "hibmc_drm_regs.h"
+
+static const struct file_operations hibmc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= drm_open,
+	.release	= drm_release,
+	.unlocked_ioctl	= drm_ioctl,
+	.compat_ioctl	= drm_compat_ioctl,
+	.mmap		= hibmc_mmap,
+	.poll		= drm_poll,
+	.read		= drm_read,
+	.llseek		= no_llseek,
+};
+
+static int hibmc_enable_vblank(struct drm_device *dev, unsigned int pipe)
+{
+	struct hibmc_drm_private *priv =
+		(struct hibmc_drm_private *)dev->dev_private;
+
+	writel(HIBMC_RAW_INTERRUPT_EN_VBLANK(1),
+	       priv->mmio + HIBMC_RAW_INTERRUPT_EN);
+
+	return 0;
+}
+
+static void hibmc_disable_vblank(struct drm_device *dev, unsigned int pipe)
+{
+	struct hibmc_drm_private *priv =
+		(struct hibmc_drm_private *)dev->dev_private;
+
+	writel(HIBMC_RAW_INTERRUPT_EN_VBLANK(0),
+	       priv->mmio + HIBMC_RAW_INTERRUPT_EN);
+}
+
+irqreturn_t hibmc_drm_interrupt(int irq, void *arg)
+{
+	struct drm_device *dev = (struct drm_device *)arg;
+	struct hibmc_drm_private *priv =
+		(struct hibmc_drm_private *)dev->dev_private;
+	u32 status;
+
+	status = readl(priv->mmio + HIBMC_RAW_INTERRUPT);
+
+	if (status & HIBMC_RAW_INTERRUPT_VBLANK(1)) {
+		writel(HIBMC_RAW_INTERRUPT_VBLANK(1),
+		       priv->mmio + HIBMC_RAW_INTERRUPT);
+		drm_handle_vblank(dev, 0);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static struct drm_driver hibmc_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET |
+				  DRIVER_ATOMIC | DRIVER_HAVE_IRQ,
+	.fops			= &hibmc_fops,
+	.name			= "hibmc",
+	.date			= "20160828",
+	.desc			= "hibmc drm driver",
+	.major			= 1,
+	.minor			= 0,
+	.get_vblank_counter	= drm_vblank_no_hw_counter,
+	.enable_vblank		= hibmc_enable_vblank,
+	.disable_vblank		= hibmc_disable_vblank,
+	.gem_free_object_unlocked = hibmc_gem_free_object,
+	.dumb_create            = hibmc_dumb_create,
+	.dumb_map_offset        = hibmc_dumb_mmap_offset,
+	.dumb_destroy           = drm_gem_dumb_destroy,
+	.irq_handler		= hibmc_drm_interrupt,
+};
+
+static int hibmc_pm_suspend(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct drm_device *drm_dev = pci_get_drvdata(pdev);
+	struct hibmc_drm_private *priv = drm_dev->dev_private;
+
+	drm_kms_helper_poll_disable(drm_dev);
+	priv->suspend_state = drm_atomic_helper_suspend(drm_dev);
+	if (IS_ERR(priv->suspend_state)) {
+		DRM_ERROR("drm_atomic_helper_suspend failed: %ld\n",
+			  PTR_ERR(priv->suspend_state));
+		drm_kms_helper_poll_enable(drm_dev);
+		return PTR_ERR(priv->suspend_state);
+	}
+
+	return 0;
+}
+
+static int hibmc_pm_resume(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct drm_device *drm_dev = pci_get_drvdata(pdev);
+	struct hibmc_drm_private *priv = drm_dev->dev_private;
+
+	drm_atomic_helper_resume(drm_dev, priv->suspend_state);
+	drm_kms_helper_poll_enable(drm_dev);
+
+	return 0;
+}
+
+static const struct dev_pm_ops hibmc_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(hibmc_pm_suspend,
+				hibmc_pm_resume)
+};
+
+static int hibmc_kms_init(struct hibmc_drm_private *priv)
+{
+	int ret;
+
+	drm_mode_config_init(priv->dev);
+	priv->mode_config_initialized = true;
+
+	priv->dev->mode_config.min_width = 0;
+	priv->dev->mode_config.min_height = 0;
+	priv->dev->mode_config.max_width = 1920;
+	priv->dev->mode_config.max_height = 1440;
+
+	priv->dev->mode_config.fb_base = priv->fb_base;
+	priv->dev->mode_config.preferred_depth = 24;
+	priv->dev->mode_config.prefer_shadow = 0;
+
+	priv->dev->mode_config.funcs = (void *)&hibmc_mode_funcs;
+
+	ret = hibmc_de_init(priv);
+	if (ret) {
+		DRM_ERROR("failed to init de: %d\n", ret);
+		return ret;
+	}
+
+	ret = hibmc_vdac_init(priv);
+	if (ret) {
+		DRM_ERROR("failed to init vdac: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void hibmc_kms_fini(struct hibmc_drm_private *priv)
+{
+	if (priv->mode_config_initialized) {
+		drm_mode_config_cleanup(priv->dev);
+		priv->mode_config_initialized = false;
+	}
+}
+
+/*
+ * It can operate in one of three modes: 0, 1 or Sleep.
+ */
+void hibmc_set_power_mode(struct hibmc_drm_private *priv,
+			  unsigned int power_mode)
+{
+	unsigned int control_value = 0;
+	void __iomem   *mmio = priv->mmio;
+	unsigned int input = 1;
+
+	if (power_mode > HIBMC_PW_MODE_CTL_MODE_SLEEP)
+		return;
+
+	if (power_mode == HIBMC_PW_MODE_CTL_MODE_SLEEP)
+		input = 0;
+
+	control_value = readl(mmio + HIBMC_POWER_MODE_CTRL);
+	control_value &= ~(HIBMC_PW_MODE_CTL_MODE_MASK |
+			   HIBMC_PW_MODE_CTL_OSC_INPUT_MASK);
+	control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_MODE, power_mode);
+	control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_OSC_INPUT, input);
+	writel(control_value, mmio + HIBMC_POWER_MODE_CTRL);
+}
+
+void hibmc_set_current_gate(struct hibmc_drm_private *priv, unsigned int gate)
+{
+	unsigned int gate_reg;
+	unsigned int mode;
+	void __iomem   *mmio = priv->mmio;
+
+	/* Get current power mode. */
+	mode = (readl(mmio + HIBMC_POWER_MODE_CTRL) &
+		HIBMC_PW_MODE_CTL_MODE_MASK) >> HIBMC_PW_MODE_CTL_MODE_SHIFT;
+
+	switch (mode) {
+	case HIBMC_PW_MODE_CTL_MODE_MODE0:
+		gate_reg = HIBMC_MODE0_GATE;
+		break;
+
+	case HIBMC_PW_MODE_CTL_MODE_MODE1:
+		gate_reg = HIBMC_MODE1_GATE;
+		break;
+
+	default:
+		gate_reg = HIBMC_MODE0_GATE;
+		break;
+	}
+	writel(gate, mmio + gate_reg);
+}
+
+static void hibmc_hw_config(struct hibmc_drm_private *priv)
+{
+	unsigned int reg;
+
+	/* On hardware reset, power mode 0 is default. */
+	hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);
+
+	/* Enable display power gate & LOCALMEM power gate*/
+	reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
+	reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
+	reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
+	reg |= HIBMC_CURR_GATE_DISPLAY(1);
+	reg |= HIBMC_CURR_GATE_LOCALMEM(1);
+
+	hibmc_set_current_gate(priv, reg);
+
+	/*
+	 * Reset the memory controller. If the memory controller
+	 * is not reset in chip,the system might hang when sw accesses
+	 * the memory.The memory should be resetted after
+	 * changing the MXCLK.
+	 */
+	reg = readl(priv->mmio + HIBMC_MISC_CTRL);
+	reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
+	reg |= HIBMC_MSCCTL_LOCALMEM_RESET(0);
+	writel(reg, priv->mmio + HIBMC_MISC_CTRL);
+
+	reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
+	reg |= HIBMC_MSCCTL_LOCALMEM_RESET(1);
+
+	writel(reg, priv->mmio + HIBMC_MISC_CTRL);
+}
+
+static int hibmc_hw_map(struct hibmc_drm_private *priv)
+{
+	struct drm_device *dev = priv->dev;
+	struct pci_dev *pdev = dev->pdev;
+	resource_size_t addr, size, ioaddr, iosize;
+
+	ioaddr = pci_resource_start(pdev, 1);
+	iosize = pci_resource_len(pdev, 1);
+	priv->mmio = devm_ioremap_nocache(dev->dev, ioaddr, iosize);
+	if (!priv->mmio) {
+		DRM_ERROR("Cannot map mmio region\n");
+		return -ENOMEM;
+	}
+
+	addr = pci_resource_start(pdev, 0);
+	size = pci_resource_len(pdev, 0);
+	priv->fb_map = devm_ioremap(dev->dev, addr, size);
+	if (!priv->fb_map) {
+		DRM_ERROR("Cannot map framebuffer\n");
+		return -ENOMEM;
+	}
+	priv->fb_base = addr;
+	priv->fb_size = size;
+
+	return 0;
+}
+
+static int hibmc_hw_init(struct hibmc_drm_private *priv)
+{
+	int ret;
+
+	ret = hibmc_hw_map(priv);
+	if (ret)
+		return ret;
+
+	hibmc_hw_config(priv);
+
+	return 0;
+}
+
+static int hibmc_unload(struct drm_device *dev)
+{
+	struct hibmc_drm_private *priv = dev->dev_private;
+
+	hibmc_fbdev_fini(priv);
+
+	if (dev->irq_enabled)
+		drm_irq_uninstall(dev);
+	if (priv->msi_enabled)
+		pci_disable_msi(dev->pdev);
+	drm_vblank_cleanup(dev);
+
+	hibmc_kms_fini(priv);
+	hibmc_mm_fini(priv);
+	dev->dev_private = NULL;
+	return 0;
+}
+
+static int hibmc_load(struct drm_device *dev)
+{
+	struct hibmc_drm_private *priv;
+	int ret;
+
+	priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv) {
+		DRM_ERROR("no memory to allocate for hibmc_drm_private\n");
+		return -ENOMEM;
+	}
+	dev->dev_private = priv;
+	priv->dev = dev;
+
+	ret = hibmc_hw_init(priv);
+	if (ret)
+		goto err;
+
+	ret = hibmc_mm_init(priv);
+	if (ret)
+		goto err;
+
+	ret = hibmc_kms_init(priv);
+	if (ret)
+		goto err;
+
+	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
+	if (ret) {
+		DRM_ERROR("failed to initialize vblank: %d\n", ret);
+		goto err;
+	}
+
+	priv->msi_enabled = 0;
+	ret = pci_enable_msi(dev->pdev);
+	if (ret) {
+		DRM_WARN("enabling MSI failed: %d\n", ret);
+	} else {
+		priv->msi_enabled = 1;
+		ret = drm_irq_install(dev, dev->pdev->irq);
+		if (ret)
+			DRM_WARN("install irq failed: %d\n", ret);
+	}
+
+	/* reset all the states of crtc/plane/encoder/connector */
+	drm_mode_config_reset(dev);
+
+	ret = hibmc_fbdev_init(priv);
+	if (ret) {
+		DRM_ERROR("failed to initialize fbdev: %d\n", ret);
+		goto err;
+	}
+
+	return 0;
+
+err:
+	hibmc_unload(dev);
+	DRM_ERROR("failed to initialize drm driver: %d\n", ret);
+	return ret;
+}
+
+static int hibmc_pci_probe(struct pci_dev *pdev,
+			   const struct pci_device_id *ent)
+{
+	struct drm_device *dev;
+	int ret;
+
+	dev = drm_dev_alloc(&hibmc_driver, &pdev->dev);
+	if (!dev) {
+		DRM_ERROR("failed to allocate drm_device\n");
+		return -ENOMEM;
+	}
+
+	dev->pdev = pdev;
+	pci_set_drvdata(pdev, dev);
+
+	ret = pci_enable_device(pdev);
+	if (ret) {
+		DRM_ERROR("failed to enable pci device: %d\n", ret);
+		goto err_free;
+	}
+
+	ret = hibmc_load(dev);
+	if (ret) {
+		DRM_ERROR("failed to load hibmc: %d\n", ret);
+		goto err_disable;
+	}
+
+	ret = drm_dev_register(dev, 0);
+	if (ret) {
+		DRM_ERROR("failed to register drv for userspace access: %d\n",
+			  ret);
+		goto err_unload;
+	}
+	return 0;
+
+err_unload:
+	hibmc_unload(dev);
+err_disable:
+	pci_disable_device(pdev);
+err_free:
+	drm_dev_unref(dev);
+
+	return ret;
+}
+
+static void hibmc_pci_remove(struct pci_dev *pdev)
+{
+	struct drm_device *dev = pci_get_drvdata(pdev);
+
+	drm_dev_unregister(dev);
+	hibmc_unload(dev);
+	drm_dev_unref(dev);
+}
+
+static struct pci_device_id hibmc_pci_table[] = {
+	{0x19e5, 0x1711, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{0,}
+};
+
+static struct pci_driver hibmc_pci_driver = {
+	.name =		"hibmc-drm",
+	.id_table =	hibmc_pci_table,
+	.probe =	hibmc_pci_probe,
+	.remove =	hibmc_pci_remove,
+	.driver.pm =    &hibmc_pm_ops,
+};
+
+static int __init hibmc_init(void)
+{
+	return pci_register_driver(&hibmc_pci_driver);
+}
+
+static void __exit hibmc_exit(void)
+{
+	return pci_unregister_driver(&hibmc_pci_driver);
+}
+
+module_init(hibmc_init);
+module_exit(hibmc_exit);
+
+MODULE_DEVICE_TABLE(pci, hibmc_pci_table);
+MODULE_AUTHOR("RongrongZou <zourongrong@huawei.com>");
+MODULE_DESCRIPTION("DRM Driver for Hisilicon Hibmc");
+MODULE_LICENSE("GPL v2");

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h

+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#ifndef HIBMC_DRM_DRV_H
+#define HIBMC_DRM_DRV_H
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem.h>
+#include <drm/ttm/ttm_bo_driver.h>
+
+struct hibmc_framebuffer {
+	struct drm_framebuffer fb;
+	struct drm_gem_object *obj;
+};
+
+struct hibmc_fbdev {
+	struct drm_fb_helper helper;
+	struct hibmc_framebuffer *fb;
+	int size;
+};
+
+struct hibmc_drm_private {
+	/* hw */
+	void __iomem   *mmio;
+	void __iomem   *fb_map;
+	unsigned long  fb_base;
+	unsigned long  fb_size;
+	bool msi_enabled;
+
+	/* drm */
+	struct drm_device  *dev;
+	bool mode_config_initialized;
+	struct drm_atomic_state *suspend_state;
+
+	/* ttm */
+	struct drm_global_reference mem_global_ref;
+	struct ttm_bo_global_ref bo_global_ref;
+	struct ttm_bo_device bdev;
+	bool initialized;
+
+	/* fbdev */
+	struct hibmc_fbdev *fbdev;
+	bool mm_inited;
+};
+
+#define to_hibmc_framebuffer(x) container_of(x, struct hibmc_framebuffer, fb)
+
+struct hibmc_bo {
+	struct ttm_buffer_object bo;
+	struct ttm_placement placement;
+	struct ttm_bo_kmap_obj kmap;
+	struct drm_gem_object gem;
+	struct ttm_place placements[3];
+	int pin_count;
+};
+
+static inline struct hibmc_bo *hibmc_bo(struct ttm_buffer_object *bo)
+{
+	return container_of(bo, struct hibmc_bo, bo);
+}
+
+static inline struct hibmc_bo *gem_to_hibmc_bo(struct drm_gem_object *gem)
+{
+	return container_of(gem, struct hibmc_bo, gem);
+}
+
+void hibmc_set_power_mode(struct hibmc_drm_private *priv,
+			  unsigned int power_mode);
+void hibmc_set_current_gate(struct hibmc_drm_private *priv,
+			    unsigned int gate);
+
+int hibmc_de_init(struct hibmc_drm_private *priv);
+int hibmc_vdac_init(struct hibmc_drm_private *priv);
+int hibmc_fbdev_init(struct hibmc_drm_private *priv);
+void hibmc_fbdev_fini(struct hibmc_drm_private *priv);
+
+int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
+		     struct drm_gem_object **obj);
+struct hibmc_framebuffer *
+hibmc_framebuffer_init(struct drm_device *dev,
+		       const struct drm_mode_fb_cmd2 *mode_cmd,
+		       struct drm_gem_object *obj);
+
+int hibmc_mm_init(struct hibmc_drm_private *hibmc);
+void hibmc_mm_fini(struct hibmc_drm_private *hibmc);
+int hibmc_bo_pin(struct hibmc_bo *bo, u32 pl_flag, u64 *gpu_addr);
+int hibmc_bo_unpin(struct hibmc_bo *bo);
+void hibmc_gem_free_object(struct drm_gem_object *obj);
+int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
+		      struct drm_mode_create_dumb *args);
+int hibmc_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
+			   u32 handle, u64 *offset);
+int hibmc_mmap(struct file *filp, struct vm_area_struct *vma);
+
+extern const struct drm_mode_config_funcs hibmc_mode_funcs;
+
+#endif

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c

+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+
+#include "hibmc_drm_drv.h"
+
+static int hibmcfb_create_object(
+				struct hibmc_drm_private *priv,
+				const struct drm_mode_fb_cmd2 *mode_cmd,
+				struct drm_gem_object **gobj_p)
+{
+	struct drm_gem_object *gobj;
+	struct drm_device *dev = priv->dev;
+	u32 size;
+	int ret = 0;
+
+	size = mode_cmd->pitches[0] * mode_cmd->height;
+	ret = hibmc_gem_create(dev, size, true, &gobj);
+	if (ret)
+		return ret;
+
+	*gobj_p = gobj;
+	return ret;
+}
+
+static struct fb_ops hibmc_drm_fb_ops = {
+	.owner = THIS_MODULE,
+	.fb_check_var = drm_fb_helper_check_var,
+	.fb_set_par = drm_fb_helper_set_par,
+	.fb_fillrect = drm_fb_helper_sys_fillrect,
+	.fb_copyarea = drm_fb_helper_sys_copyarea,
+	.fb_imageblit = drm_fb_helper_sys_imageblit,
+	.fb_pan_display = drm_fb_helper_pan_display,
+	.fb_blank = drm_fb_helper_blank,
+	.fb_setcmap = drm_fb_helper_setcmap,
+};
+
+static int hibmc_drm_fb_create(struct drm_fb_helper *helper,
+			       struct drm_fb_helper_surface_size *sizes)
+{
+	struct hibmc_fbdev *hi_fbdev =
+		container_of(helper, struct hibmc_fbdev, helper);
+	struct hibmc_drm_private *priv = helper->dev->dev_private;
+	struct fb_info *info;
+	struct drm_mode_fb_cmd2 mode_cmd;
+	struct drm_gem_object *gobj = NULL;
+	int ret = 0;
+	int ret1;
+	size_t size;
+	unsigned int bytes_per_pixel;
+	struct hibmc_bo *bo = NULL;
+
+	DRM_DEBUG_DRIVER("surface width(%d), height(%d) and bpp(%d)\n",
+			 sizes->surface_width, sizes->surface_height,
+			 sizes->surface_bpp);
+	sizes->surface_depth = 32;
+
+	bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
+
+	mode_cmd.width = sizes->surface_width;
+	mode_cmd.height = sizes->surface_height;
+	mode_cmd.pitches[0] = mode_cmd.width * bytes_per_pixel;
+	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+							  sizes->surface_depth);
+
+	size = PAGE_ALIGN(mode_cmd.pitches[0] * mode_cmd.height);
+
+	ret = hibmcfb_create_object(priv, &mode_cmd, &gobj);
+	if (ret) {
+		DRM_ERROR("failed to create fbcon backing object: %d\n", ret);
+		return -ENOMEM;
+	}
+
+	bo = gem_to_hibmc_bo(gobj);
+
+	ret = ttm_bo_reserve(&bo->bo, true, false, NULL);
+	if (ret) {
+		DRM_ERROR("failed to reserve ttm_bo: %d\n", ret);
+		goto out_unref_gem;
+	}
+
+	ret = hibmc_bo_pin(bo, TTM_PL_FLAG_VRAM, NULL);
+	if (ret) {
+		DRM_ERROR("failed to pin fbcon: %d\n", ret);
+		goto out_unreserve_ttm_bo;
+	}
+
+	ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
+	if (ret) {
+		DRM_ERROR("failed to kmap fbcon: %d\n", ret);
+		goto out_unpin_bo;
+	}
+	ttm_bo_unreserve(&bo->bo);
+
+	info = drm_fb_helper_alloc_fbi(helper);
+	if (IS_ERR(info)) {
+		ret = PTR_ERR(info);
+		DRM_ERROR("failed to allocate fbi: %d\n", ret);
+		goto out_release_fbi;
+	}
+
+	info->par = hi_fbdev;
+
+	hi_fbdev->fb = hibmc_framebuffer_init(priv->dev, &mode_cmd, gobj);
+	if (IS_ERR(hi_fbdev->fb)) {
+		ret = PTR_ERR(info);
+		DRM_ERROR("failed to initialize framebuffer: %d\n", ret);
+		goto out_release_fbi;
+	}
+
+	priv->fbdev->size = size;
+	hi_fbdev->helper.fb = &hi_fbdev->fb->fb;
+
+	strcpy(info->fix.id, "hibmcdrmfb");
+
+	info->flags = FBINFO_DEFAULT;
+	info->fbops = &hibmc_drm_fb_ops;
+
+	drm_fb_helper_fill_fix(info, hi_fbdev->fb->fb.pitches[0],
+			       hi_fbdev->fb->fb.depth);
+	drm_fb_helper_fill_var(info, &priv->fbdev->helper, sizes->fb_width,
+			       sizes->fb_height);
+
+	info->screen_base = bo->kmap.virtual;
+	info->screen_size = size;
+
+	info->fix.smem_start = bo->bo.mem.bus.offset + bo->bo.mem.bus.base;
+	info->fix.smem_len = size;
+	return 0;
+
+out_release_fbi:
+	drm_fb_helper_release_fbi(helper);
+	ret1 = ttm_bo_reserve(&bo->bo, true, false, NULL);
+	if (ret1) {
+		DRM_ERROR("failed to rsv ttm_bo when release fbi: %d\n", ret1);
+		goto out_unref_gem;
+	}
+	ttm_bo_kunmap(&bo->kmap);
+out_unpin_bo:
+	hibmc_bo_unpin(bo);
+out_unreserve_ttm_bo:
+	ttm_bo_unreserve(&bo->bo);
+out_unref_gem:
+	drm_gem_object_unreference_unlocked(gobj);
+
+	return ret;
+}
+
+static void hibmc_fbdev_destroy(struct hibmc_fbdev *fbdev)
+{
+	struct hibmc_framebuffer *gfb = fbdev->fb;
+	struct drm_fb_helper *fbh = &fbdev->helper;
+
+	drm_fb_helper_unregister_fbi(fbh);
+	drm_fb_helper_release_fbi(fbh);
+
+	drm_fb_helper_fini(fbh);
+
+	if (gfb)
+		drm_framebuffer_unreference(&gfb->fb);
+}
+
+static const struct drm_fb_helper_funcs hibmc_fbdev_helper_funcs = {
+	.fb_probe = hibmc_drm_fb_create,
+};
+
+int hibmc_fbdev_init(struct hibmc_drm_private *priv)
+{
+	int ret;
+	struct fb_var_screeninfo *var;
+	struct fb_fix_screeninfo *fix;
+	struct hibmc_fbdev *hifbdev;
+
+	hifbdev = devm_kzalloc(priv->dev->dev, sizeof(*hifbdev), GFP_KERNEL);
+	if (!hifbdev) {
+		DRM_ERROR("failed to allocate hibmc_fbdev\n");
+		return -ENOMEM;
+	}
+
+	priv->fbdev = hifbdev;
+	drm_fb_helper_prepare(priv->dev, &hifbdev->helper,
+			      &hibmc_fbdev_helper_funcs);
+
+	/* Now just one crtc and one channel */
+	ret = drm_fb_helper_init(priv->dev,
+				 &hifbdev->helper, 1, 1);
+	if (ret) {
+		DRM_ERROR("failed to initialize fb helper: %d\n", ret);
+		return ret;
+	}
+
+	ret = drm_fb_helper_single_add_all_connectors(&hifbdev->helper);
+	if (ret) {
+		DRM_ERROR("failed to add all connectors: %d\n", ret);
+		goto fini;
+	}
+
+	ret = drm_fb_helper_initial_config(&hifbdev->helper, 16);
+	if (ret) {
+		DRM_ERROR("failed to setup initial conn config: %d\n", ret);
+		goto fini;
+	}
+
+	var = &hifbdev->helper.fbdev->var;
+	fix = &hifbdev->helper.fbdev->fix;
+
+	DRM_DEBUG_DRIVER("Member of info->var is :\n"
+			 "xres=%d\n"
+			 "yres=%d\n"
+			 "xres_virtual=%d\n"
+			 "yres_virtual=%d\n"
+			 "xoffset=%d\n"
+			 "yoffset=%d\n"
+			 "bits_per_pixel=%d\n"
+			 "...\n", var->xres, var->yres, var->xres_virtual,
+			 var->yres_virtual, var->xoffset, var->yoffset,
+			 var->bits_per_pixel);
+	DRM_DEBUG_DRIVER("Member of info->fix is :\n"
+			 "smem_start=%lx\n"
+			 "smem_len=%d\n"
+			 "type=%d\n"
+			 "type_aux=%d\n"
+			 "visual=%d\n"
+			 "xpanstep=%d\n"
+			 "ypanstep=%d\n"
+			 "ywrapstep=%d\n"
+			 "line_length=%d\n"
+			 "accel=%d\n"
+			 "capabilities=%d\n"
+			 "...\n", fix->smem_start, fix->smem_len, fix->type,
+			 fix->type_aux, fix->visual, fix->xpanstep,
+			 fix->ypanstep, fix->ywrapstep, fix->line_length,
+			 fix->accel, fix->capabilities);
+
+	return 0;
+
+fini:
+	drm_fb_helper_fini(&hifbdev->helper);
+	return ret;
+}
+
+void hibmc_fbdev_fini(struct hibmc_drm_private *priv)
+{
+	if (!priv->fbdev)
+		return;
+
+	hibmc_fbdev_destroy(priv->fbdev);
+	priv->fbdev = NULL;
+}

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_regs.h

+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#ifndef HIBMC_DRM_HW_H
+#define HIBMC_DRM_HW_H
+
+/* register definition */
+#define HIBMC_MISC_CTRL				0x4
+
+#define HIBMC_MSCCTL_LOCALMEM_RESET(x)		((x) << 6)
+#define HIBMC_MSCCTL_LOCALMEM_RESET_MASK	0x40
+
+#define HIBMC_CURRENT_GATE			0x000040
+#define HIBMC_CURR_GATE_DISPLAY(x)		((x) << 2)
+#define HIBMC_CURR_GATE_DISPLAY_MASK		0x4
+
+#define HIBMC_CURR_GATE_LOCALMEM(x)		((x) << 1)
+#define HIBMC_CURR_GATE_LOCALMEM_MASK		0x2
+
+#define HIBMC_MODE0_GATE			0x000044
+#define HIBMC_MODE1_GATE			0x000048
+#define HIBMC_POWER_MODE_CTRL			0x00004C
+
+#define HIBMC_PW_MODE_CTL_OSC_INPUT(x)		((x) << 3)
+#define HIBMC_PW_MODE_CTL_OSC_INPUT_MASK	0x8
+
+#define HIBMC_PW_MODE_CTL_MODE(x)		((x) << 0)
+#define HIBMC_PW_MODE_CTL_MODE_MASK		0x03
+#define HIBMC_PW_MODE_CTL_MODE_SHIFT		0
+
+#define HIBMC_PW_MODE_CTL_MODE_MODE0		0
+#define HIBMC_PW_MODE_CTL_MODE_MODE1		1
+#define HIBMC_PW_MODE_CTL_MODE_SLEEP		2
+
+#define HIBMC_PANEL_PLL_CTRL			0x00005C
+#define HIBMC_CRT_PLL_CTRL			0x000060
+
+#define HIBMC_PLL_CTRL_BYPASS(x)		((x) << 18)
+#define HIBMC_PLL_CTRL_BYPASS_MASK		0x40000
+
+#define HIBMC_PLL_CTRL_POWER(x)			((x) << 17)
+#define HIBMC_PLL_CTRL_POWER_MASK		0x20000
+
+#define HIBMC_PLL_CTRL_INPUT(x)			((x) << 16)
+#define HIBMC_PLL_CTRL_INPUT_MASK		0x10000
+
+#define HIBMC_PLL_CTRL_POD(x)			((x) << 14)
+#define HIBMC_PLL_CTRL_POD_MASK			0xC000
+
+#define HIBMC_PLL_CTRL_OD(x)			((x) << 12)
+#define HIBMC_PLL_CTRL_OD_MASK			0x3000
+
+#define HIBMC_PLL_CTRL_N(x)			((x) << 8)
+#define HIBMC_PLL_CTRL_N_MASK			0xF00
+
+#define HIBMC_PLL_CTRL_M(x)			((x) << 0)
+#define HIBMC_PLL_CTRL_M_MASK			0xFF
+
+#define HIBMC_CRT_DISP_CTL			0x80200
+
+#define HIBMC_CRT_DISP_CTL_CRTSELECT(x)		((x) << 25)
+#define HIBMC_CRT_DISP_CTL_CRTSELECT_MASK	0x2000000
+
+#define HIBMC_CRTSELECT_CRT			1
+
+#define HIBMC_CRT_DISP_CTL_CLOCK_PHASE(x)	((x) << 14)
+#define HIBMC_CRT_DISP_CTL_CLOCK_PHASE_MASK	0x4000
+
+#define HIBMC_CRT_DISP_CTL_VSYNC_PHASE(x)	((x) << 13)
+#define HIBMC_CRT_DISP_CTL_VSYNC_PHASE_MASK	0x2000
+
+#define HIBMC_CRT_DISP_CTL_HSYNC_PHASE(x)	((x) << 12)
+#define HIBMC_CRT_DISP_CTL_HSYNC_PHASE_MASK	0x1000
+
+#define HIBMC_CRT_DISP_CTL_TIMING(x)		((x) << 8)
+#define HIBMC_CRT_DISP_CTL_TIMING_MASK		0x100
+
+#define HIBMC_CRT_DISP_CTL_PLANE(x)		((x) << 2)
+#define HIBMC_CRT_DISP_CTL_PLANE_MASK		4
+
+#define HIBMC_CRT_DISP_CTL_FORMAT(x)		((x) << 0)
+#define HIBMC_CRT_DISP_CTL_FORMAT_MASK		0x03
+
+#define HIBMC_CRT_FB_ADDRESS			0x080204
+
+#define HIBMC_CRT_FB_WIDTH			0x080208
+#define HIBMC_CRT_FB_WIDTH_WIDTH(x)		((x) << 16)
+#define HIBMC_CRT_FB_WIDTH_WIDTH_MASK		0x3FFF0000
+#define HIBMC_CRT_FB_WIDTH_OFFS(x)		((x) << 0)
+#define HIBMC_CRT_FB_WIDTH_OFFS_MASK		0x3FFF
+
+#define HIBMC_CRT_HORZ_TOTAL			0x08020C
+#define HIBMC_CRT_HORZ_TOTAL_TOTAL(x)		((x) << 16)
+#define HIBMC_CRT_HORZ_TOTAL_TOTAL_MASK		0xFFF0000
+
+#define HIBMC_CRT_HORZ_TOTAL_DISP_END(x)	((x) << 0)
+#define HIBMC_CRT_HORZ_TOTAL_DISP_END_MASK	0xFFF
+
+#define HIBMC_CRT_HORZ_SYNC			0x080210
+#define HIBMC_CRT_HORZ_SYNC_WIDTH(x)		((x) << 16)
+#define HIBMC_CRT_HORZ_SYNC_WIDTH_MASK		0xFF0000
+
+#define HIBMC_CRT_HORZ_SYNC_START(x)		((x) << 0)
+#define HIBMC_CRT_HORZ_SYNC_START_MASK		0xFFF
+
+#define HIBMC_CRT_VERT_TOTAL			0x080214
+#define HIBMC_CRT_VERT_TOTAL_TOTAL(x)		((x) << 16)
+#define HIBMC_CRT_VERT_TOTAL_TOTAL_MASK		0x7FFF0000
+
+#define HIBMC_CRT_VERT_TOTAL_DISP_END(x)	((x) << 0)
+#define HIBMC_CRT_VERT_TOTAL_DISP_END_MASK	0x7FF
+
+#define HIBMC_CRT_VERT_SYNC			0x080218
+#define HIBMC_CRT_VERT_SYNC_HEIGHT(x)		((x) << 16)
+#define HIBMC_CRT_VERT_SYNC_HEIGHT_MASK		0x3F0000
+
+#define HIBMC_CRT_VERT_SYNC_START(x)		((x) << 0)
+#define HIBMC_CRT_VERT_SYNC_START_MASK		0x7FF
+
+/* Auto Centering */
+#define HIBMC_CRT_AUTO_CENTERING_TL		0x080280
+#define HIBMC_CRT_AUTO_CENTERING_TL_TOP(x)	((x) << 16)
+#define HIBMC_CRT_AUTO_CENTERING_TL_TOP_MASK	0x7FF0000
+
+#define HIBMC_CRT_AUTO_CENTERING_TL_LEFT(x)	((x) << 0)
+#define HIBMC_CRT_AUTO_CENTERING_TL_LEFT_MASK	0x7FF
+
+#define HIBMC_CRT_AUTO_CENTERING_BR		0x080284
+#define HIBMC_CRT_AUTO_CENTERING_BR_BOTTOM(x)	((x) << 16)
+#define HIBMC_CRT_AUTO_CENTERING_BR_BOTTOM_MASK	0x7FF0000
+
+#define HIBMC_CRT_AUTO_CENTERING_BR_RIGHT(x)	((x) << 0)
+#define HIBMC_CRT_AUTO_CENTERING_BR_RIGHT_MASK	0x7FF
+
+/* register to control panel output */
+#define HIBMC_DISPLAY_CONTROL_HISILE		0x80288
+#define HIBMC_DISPLAY_CONTROL_FPVDDEN(x)	((x) << 0)
+#define HIBMC_DISPLAY_CONTROL_PANELDATE(x)	((x) << 1)
+#define HIBMC_DISPLAY_CONTROL_FPEN(x)		((x) << 2)
+#define HIBMC_DISPLAY_CONTROL_VBIASEN(x)	((x) << 3)
+
+#define HIBMC_RAW_INTERRUPT			0x80290
+#define HIBMC_RAW_INTERRUPT_VBLANK(x)		((x) << 2)
+#define HIBMC_RAW_INTERRUPT_VBLANK_MASK		0x4
+
+#define HIBMC_RAW_INTERRUPT_EN			0x80298
+#define HIBMC_RAW_INTERRUPT_EN_VBLANK(x)	((x) << 2)
+#define HIBMC_RAW_INTERRUPT_EN_VBLANK_MASK	0x4
+
+/* register and values for PLL control */
+#define CRT_PLL1_HS				0x802a8
+#define CRT_PLL1_HS_OUTER_BYPASS(x)		((x) << 30)
+#define CRT_PLL1_HS_INTER_BYPASS(x)		((x) << 29)
+#define CRT_PLL1_HS_POWERON(x)			((x) << 24)
+
+#define CRT_PLL1_HS_25MHZ			0x23d40f02
+#define CRT_PLL1_HS_40MHZ			0x23940801
+#define CRT_PLL1_HS_65MHZ			0x23940d01
+#define CRT_PLL1_HS_78MHZ			0x23540F82
+#define CRT_PLL1_HS_74MHZ			0x23941dc2
+#define CRT_PLL1_HS_80MHZ			0x23941001
+#define CRT_PLL1_HS_80MHZ_1152			0x23540fc2
+#define CRT_PLL1_HS_108MHZ			0x23b41b01
+#define CRT_PLL1_HS_162MHZ			0x23480681
+#define CRT_PLL1_HS_148MHZ			0x23541dc2
+#define CRT_PLL1_HS_193MHZ			0x234807c1
+
+#define CRT_PLL2_HS				0x802ac
+#define CRT_PLL2_HS_25MHZ			0x206B851E
+#define CRT_PLL2_HS_40MHZ			0x30000000
+#define CRT_PLL2_HS_65MHZ			0x40000000
+#define CRT_PLL2_HS_78MHZ			0x50E147AE
+#define CRT_PLL2_HS_74MHZ			0x602B6AE7
+#define CRT_PLL2_HS_80MHZ			0x70000000
+#define CRT_PLL2_HS_108MHZ			0x80000000
+#define CRT_PLL2_HS_162MHZ			0xA0000000
+#define CRT_PLL2_HS_148MHZ			0xB0CCCCCD
+#define CRT_PLL2_HS_193MHZ			0xC0872B02
+
+#define HIBMC_FIELD(field, value) (field(value) & field##_MASK)
+#endif

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c

+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "hibmc_drm_drv.h"
+#include "hibmc_drm_regs.h"
+
+static int hibmc_connector_get_modes(struct drm_connector *connector)
+{
+	return drm_add_modes_noedid(connector, 800, 600);
+}
+
+static int hibmc_connector_mode_valid(struct drm_connector *connector,
+				      struct drm_display_mode *mode)
+{
+	return MODE_OK;
+}
+
+static struct drm_encoder *
+hibmc_connector_best_encoder(struct drm_connector *connector)
+{
+	return drm_encoder_find(connector->dev, connector->encoder_ids[0]);
+}
+
+static enum drm_connector_status hibmc_connector_detect(struct drm_connector
+						 *connector, bool force)
+{
+	return connector_status_connected;
+}
+
+static const struct drm_connector_helper_funcs
+	hibmc_connector_helper_funcs = {
+	.get_modes = hibmc_connector_get_modes,
+	.mode_valid = hibmc_connector_mode_valid,
+	.best_encoder = hibmc_connector_best_encoder,
+};
+
+static const struct drm_connector_funcs hibmc_connector_funcs = {
+	.dpms = drm_atomic_helper_connector_dpms,
+	.detect = hibmc_connector_detect,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = drm_connector_cleanup,
+	.reset = drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static struct drm_connector *
+hibmc_connector_init(struct hibmc_drm_private *priv)
+{
+	struct drm_device *dev = priv->dev;
+	struct drm_connector *connector;
+	int ret;
+
+	connector = devm_kzalloc(dev->dev, sizeof(*connector), GFP_KERNEL);
+	if (!connector) {
+		DRM_ERROR("failed to alloc memory when init connector\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	ret = drm_connector_init(dev, connector,
+				 &hibmc_connector_funcs,
+				 DRM_MODE_CONNECTOR_VGA);
+	if (ret) {
+		DRM_ERROR("failed to init connector: %d\n", ret);
+		return ERR_PTR(ret);
+	}
+	drm_connector_helper_add(connector,
+				 &hibmc_connector_helper_funcs);
+
+	return connector;
+}
+
+static void hibmc_encoder_mode_set(struct drm_encoder *encoder,
+				   struct drm_display_mode *mode,
+				   struct drm_display_mode *adj_mode)
+{
+	u32 reg;
+	struct drm_device *dev = encoder->dev;
+	struct hibmc_drm_private *priv = dev->dev_private;
+
+	reg = readl(priv->mmio + HIBMC_DISPLAY_CONTROL_HISILE);
+	reg |= HIBMC_DISPLAY_CONTROL_FPVDDEN(1);
+	reg |= HIBMC_DISPLAY_CONTROL_PANELDATE(1);
+	reg |= HIBMC_DISPLAY_CONTROL_FPEN(1);
+	reg |= HIBMC_DISPLAY_CONTROL_VBIASEN(1);
+	writel(reg, priv->mmio + HIBMC_DISPLAY_CONTROL_HISILE);
+}
+
+static const struct drm_encoder_helper_funcs hibmc_encoder_helper_funcs = {
+	.mode_set = hibmc_encoder_mode_set,
+};
+
+static const struct drm_encoder_funcs hibmc_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+int hibmc_vdac_init(struct hibmc_drm_private *priv)
+{
+	struct drm_device *dev = priv->dev;
+	struct drm_encoder *encoder;
+	struct drm_connector *connector;
+	int ret;
+
+	connector = hibmc_connector_init(priv);
+	if (IS_ERR(connector)) {
+		DRM_ERROR("failed to create connector: %ld\n",
+			  PTR_ERR(connector));
+		return PTR_ERR(connector);
+	}
+
+	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
+	if (!encoder) {
+		DRM_ERROR("failed to alloc memory when init encoder\n");
+		return -ENOMEM;
+	}
+
+	encoder->possible_crtcs = 0x1;
+	ret = drm_encoder_init(dev, encoder, &hibmc_encoder_funcs,
+			       DRM_MODE_ENCODER_DAC, NULL);
+	if (ret) {
+		DRM_ERROR("failed to init encoder: %d\n", ret);
+		return ret;
+	}
+
+	drm_encoder_helper_add(encoder, &hibmc_encoder_helper_funcs);
+	drm_mode_connector_attach_encoder(connector, encoder);
+
+	return 0;
+}

drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c

+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <ttm/ttm_page_alloc.h>
+
+#include "hibmc_drm_drv.h"
+
+#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
+
+static inline struct hibmc_drm_private *
+hibmc_bdev(struct ttm_bo_device *bd)
+{
+	return container_of(bd, struct hibmc_drm_private, bdev);
+}
+
+static int
+hibmc_ttm_mem_global_init(struct drm_global_reference *ref)
+{
+	return ttm_mem_global_init(ref->object);
+}
+
+static void
+hibmc_ttm_mem_global_release(struct drm_global_reference *ref)
+{
+	ttm_mem_global_release(ref->object);
+}
+
+static int hibmc_ttm_global_init(struct hibmc_drm_private *hibmc)
+{
+	int ret;
+
+	hibmc->mem_global_ref.global_type = DRM_GLOBAL_TTM_MEM;
+	hibmc->mem_global_ref.size = sizeof(struct ttm_mem_global);
+	hibmc->mem_global_ref.init = &hibmc_ttm_mem_global_init;
+	hibmc->mem_global_ref.release = &hibmc_ttm_mem_global_release;
+	ret = drm_global_item_ref(&hibmc->mem_global_ref);
+	if (ret) {
+		DRM_ERROR("could not get ref on ttm global: %d\n", ret);
+		return ret;
+	}
+
+	hibmc->bo_global_ref.mem_glob =
+		hibmc->mem_global_ref.object;
+	hibmc->bo_global_ref.ref.global_type = DRM_GLOBAL_TTM_BO;
+	hibmc->bo_global_ref.ref.size = sizeof(struct ttm_bo_global);
+	hibmc->bo_global_ref.ref.init = &ttm_bo_global_init;
+	hibmc->bo_global_ref.ref.release = &ttm_bo_global_release;
+	ret = drm_global_item_ref(&hibmc->bo_global_ref.ref);
+	if (ret) {
+		DRM_ERROR("failed setting up TTM BO subsystem: %d\n", ret);
+		drm_global_item_unref(&hibmc->mem_global_ref);
+		return ret;
+	}
+	return 0;
+}
+
+static void
+hibmc_ttm_global_release(struct hibmc_drm_private *hibmc)
+{
+	drm_global_item_unref(&hibmc->bo_global_ref.ref);
+	drm_global_item_unref(&hibmc->mem_global_ref);
+	hibmc->mem_global_ref.release = NULL;
+}
+
+static void hibmc_bo_ttm_destroy(struct ttm_buffer_object *tbo)
+{
+	struct hibmc_bo *bo = container_of(tbo, struct hibmc_bo, bo);
+
+	drm_gem_object_release(&bo->gem);
+	kfree(bo);
+}
+
+static bool hibmc_ttm_bo_is_hibmc_bo(struct ttm_buffer_object *bo)
+{
+	return bo->destroy == &hibmc_bo_ttm_destroy;
+}
+
+static int
+hibmc_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type,
+		       struct ttm_mem_type_manager *man)
+{
+	switch (type) {
+	case TTM_PL_SYSTEM:
+		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
+		man->available_caching = TTM_PL_MASK_CACHING;
+		man->default_caching = TTM_PL_FLAG_CACHED;
+		break;
+	case TTM_PL_VRAM:
+		man->func = &ttm_bo_manager_func;
+		man->flags = TTM_MEMTYPE_FLAG_FIXED |
+			TTM_MEMTYPE_FLAG_MAPPABLE;
+		man->available_caching = TTM_PL_FLAG_UNCACHED |
+			TTM_PL_FLAG_WC;
+		man->default_caching = TTM_PL_FLAG_WC;
+		break;
+	default:
+		DRM_ERROR("unsupported memory type %u\n", type);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+void hibmc_ttm_placement(struct hibmc_bo *bo, int domain)
+{
+	u32 count = 0;
+	u32 i;
+
+	bo->placement.placement = bo->placements;
+	bo->placement.busy_placement = bo->placements;
+	if (domain & TTM_PL_FLAG_VRAM)
+		bo->placements[count++].flags = TTM_PL_FLAG_WC |
+			TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
+	if (domain & TTM_PL_FLAG_SYSTEM)
+		bo->placements[count++].flags = TTM_PL_MASK_CACHING |
+			TTM_PL_FLAG_SYSTEM;
+	if (!count)
+		bo->placements[count++].flags = TTM_PL_MASK_CACHING |
+			TTM_PL_FLAG_SYSTEM;
+
+	bo->placement.num_placement = count;
+	bo->placement.num_busy_placement = count;
+	for (i = 0; i < count; i++) {
+		bo->placements[i].fpfn = 0;
+		bo->placements[i].lpfn = 0;
+	}
+}
+
+static void
+hibmc_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
+{
+	struct hibmc_bo *hibmcbo = hibmc_bo(bo);
+
+	if (!hibmc_ttm_bo_is_hibmc_bo(bo))
+		return;
+
+	hibmc_ttm_placement(hibmcbo, TTM_PL_FLAG_SYSTEM);
+	*pl = hibmcbo->placement;
+}
+
+static int hibmc_bo_verify_access(struct ttm_buffer_object *bo,
+				  struct file *filp)
+{
+	struct hibmc_bo *hibmcbo = hibmc_bo(bo);
+
+	return drm_vma_node_verify_access(&hibmcbo->gem.vma_node,
+					  filp->private_data);
+}
+
+static int hibmc_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
+				    struct ttm_mem_reg *mem)
+{
+	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
+	struct hibmc_drm_private *hibmc = hibmc_bdev(bdev);
+
+	mem->bus.addr = NULL;
+	mem->bus.offset = 0;
+	mem->bus.size = mem->num_pages << PAGE_SHIFT;
+	mem->bus.base = 0;
+	mem->bus.is_iomem = false;
+	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
+		return -EINVAL;
+	switch (mem->mem_type) {
+	case TTM_PL_SYSTEM:
+		/* system memory */
+		return 0;
+	case TTM_PL_VRAM:
+		mem->bus.offset = mem->start << PAGE_SHIFT;
+		mem->bus.base = pci_resource_start(hibmc->dev->pdev, 0);
+		mem->bus.is_iomem = true;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static void hibmc_ttm_backend_destroy(struct ttm_tt *tt)
+{
+	ttm_tt_fini(tt);
+	kfree(tt);
+}
+
+static struct ttm_backend_func hibmc_tt_backend_func = {
+	.destroy = &hibmc_ttm_backend_destroy,
+};
+
+static struct ttm_tt *hibmc_ttm_tt_create(struct ttm_bo_device *bdev,
+					  unsigned long size,
+					  u32 page_flags,
+					  struct page *dummy_read_page)
+{
+	struct ttm_tt *tt;
+	int ret;
+
+	tt = kzalloc(sizeof(*tt), GFP_KERNEL);
+	if (!tt) {
+		DRM_ERROR("failed to allocate ttm_tt\n");
+		return NULL;
+	}
+	tt->func = &hibmc_tt_backend_func;
+	ret = ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page);
+	if (ret) {
+		DRM_ERROR("failed to initialize ttm_tt: %d\n", ret);
+		kfree(tt);
+		return NULL;
+	}
+	return tt;
+}
+
+static int hibmc_ttm_tt_populate(struct ttm_tt *ttm)
+{
+	return ttm_pool_populate(ttm);
+}
+
+static void hibmc_ttm_tt_unpopulate(struct ttm_tt *ttm)
+{
+	ttm_pool_unpopulate(ttm);
+}
+
+struct ttm_bo_driver hibmc_bo_driver = {
+	.ttm_tt_create		= hibmc_ttm_tt_create,
+	.ttm_tt_populate	= hibmc_ttm_tt_populate,
+	.ttm_tt_unpopulate	= hibmc_ttm_tt_unpopulate,
+	.init_mem_type		= hibmc_bo_init_mem_type,
+	.evict_flags		= hibmc_bo_evict_flags,
+	.move			= NULL,
+	.verify_access		= hibmc_bo_verify_access,
+	.io_mem_reserve		= &hibmc_ttm_io_mem_reserve,
+	.io_mem_free		= NULL,
+	.lru_tail		= &ttm_bo_default_lru_tail,
+	.swap_lru_tail		= &ttm_bo_default_swap_lru_tail,
+};
+
+int hibmc_mm_init(struct hibmc_drm_private *hibmc)
+{
+	int ret;
+	struct drm_device *dev = hibmc->dev;
+	struct ttm_bo_device *bdev = &hibmc->bdev;
+
+	ret = hibmc_ttm_global_init(hibmc);
+	if (ret)
+		return ret;
+
+	ret = ttm_bo_device_init(&hibmc->bdev,
+				 hibmc->bo_global_ref.ref.object,
+				 &hibmc_bo_driver,
+				 dev->anon_inode->i_mapping,
+				 DRM_FILE_PAGE_OFFSET,
+				 true);
+	if (ret) {
+		hibmc_ttm_global_release(hibmc);
+		DRM_ERROR("error initializing bo driver: %d\n", ret);
+		return ret;
+	}
+
+	ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
+			     hibmc->fb_size >> PAGE_SHIFT);
+	if (ret) {
+		hibmc_ttm_global_release(hibmc);
+		DRM_ERROR("failed ttm VRAM init: %d\n", ret);
+		return ret;
+	}
+
+	hibmc->mm_inited = true;
+	return 0;
+}
+
+void hibmc_mm_fini(struct hibmc_drm_private *hibmc)
+{
+	if (!hibmc->mm_inited)
+		return;
+
+	ttm_bo_device_release(&hibmc->bdev);
+	hibmc_ttm_global_release(hibmc);
+	hibmc->mm_inited = false;
+}
+
+static void hibmc_bo_unref(struct hibmc_bo **bo)
+{
+	struct ttm_buffer_object *tbo;
+
+	if ((*bo) == NULL)
+		return;
+
+	tbo = &((*bo)->bo);
+	ttm_bo_unref(&tbo);
+	*bo = NULL;
+}
+
+int hibmc_bo_create(struct drm_device *dev, int size, int align,
+		    u32 flags, struct hibmc_bo **phibmcbo)
+{
+	struct hibmc_drm_private *hibmc = dev->dev_private;
+	struct hibmc_bo *hibmcbo;
+	size_t acc_size;
+	int ret;
+
+	hibmcbo = kzalloc(sizeof(*hibmcbo), GFP_KERNEL);
+	if (!hibmcbo) {
+		DRM_ERROR("failed to allocate hibmcbo\n");
+		return -ENOMEM;
+	}
+	ret = drm_gem_object_init(dev, &hibmcbo->gem, size);
+	if (ret) {
+		DRM_ERROR("failed to initialize drm gem object: %d\n", ret);
+		kfree(hibmcbo);
+		return ret;
+	}
+
+	hibmcbo->bo.bdev = &hibmc->bdev;
+
+	hibmc_ttm_placement(hibmcbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
+
+	acc_size = ttm_bo_dma_acc_size(&hibmc->bdev, size,
+				       sizeof(struct hibmc_bo));
+
+	ret = ttm_bo_init(&hibmc->bdev, &hibmcbo->bo, size,
+			  ttm_bo_type_device, &hibmcbo->placement,
+			  align >> PAGE_SHIFT, false, NULL, acc_size,
+			  NULL, NULL, hibmc_bo_ttm_destroy);
+	if (ret) {
+		hibmc_bo_unref(&hibmcbo);
+		DRM_ERROR("failed to initialize ttm_bo: %d\n", ret);
+		return ret;
+	}
+
+	*phibmcbo = hibmcbo;
+	return 0;
+}
+
+int hibmc_bo_pin(struct hibmc_bo *bo, u32 pl_flag, u64 *gpu_addr)
+{
+	int i, ret;
+
+	if (bo->pin_count) {
+		bo->pin_count++;
+		if (gpu_addr)
+			*gpu_addr = bo->bo.offset;
+		return 0;
+	}
+
+	hibmc_ttm_placement(bo, pl_flag);
+	for (i = 0; i < bo->placement.num_placement; i++)
+		bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
+	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
+	if (ret)
+		return ret;
+
+	bo->pin_count = 1;
+	if (gpu_addr)
+		*gpu_addr = bo->bo.offset;
+	return 0;
+}
+
+int hibmc_bo_unpin(struct hibmc_bo *bo)
+{
+	int i, ret;
+
+	if (!bo->pin_count) {
+		DRM_ERROR("unpin bad %p\n", bo);
+		return 0;
+	}
+	bo->pin_count--;
+	if (bo->pin_count)
+		return 0;
+
+	for (i = 0; i < bo->placement.num_placement ; i++)
+		bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
+	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
+	if (ret) {
+		DRM_ERROR("validate failed for unpin: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int hibmc_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+	struct drm_file *file_priv;
+	struct hibmc_drm_private *hibmc;
+
+	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
+		return -EINVAL;
+
+	file_priv = filp->private_data;
+	hibmc = file_priv->minor->dev->dev_private;
+	return ttm_bo_mmap(filp, vma, &hibmc->bdev);
+}
+
+int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
+		     struct drm_gem_object **obj)
+{
+	struct hibmc_bo *hibmcbo;
+	int ret;
+
+	*obj = NULL;
+
+	size = PAGE_ALIGN(size);
+	if (size == 0) {
+		DRM_ERROR("error: zero size\n");
+		return -EINVAL;
+	}
+
+	ret = hibmc_bo_create(dev, size, 0, 0, &hibmcbo);
+	if (ret) {
+		if (ret != -ERESTARTSYS)
+			DRM_ERROR("failed to allocate GEM object: %d\n", ret);
+		return ret;
+	}
+	*obj = &hibmcbo->gem;
+	return 0;
+}
+
+int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
+		      struct drm_mode_create_dumb *args)
+{
+	struct drm_gem_object *gobj;
+	u32 handle;
+	int ret;
+
+	args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 16);
+	args->size = args->pitch * args->height;
+
+	ret = hibmc_gem_create(dev, args->size, false,
+			       &gobj);
+	if (ret) {
+		DRM_ERROR("failed to create GEM object: %d\n", ret);
+		return ret;
+	}
+
+	ret = drm_gem_handle_create(file, gobj, &handle);
+	drm_gem_object_unreference_unlocked(gobj);
+	if (ret) {
+		DRM_ERROR("failed to unreference GEM object: %d\n", ret);
+		return ret;
+	}
+
+	args->handle = handle;
+	return 0;
+}
+
+void hibmc_gem_free_object(struct drm_gem_object *obj)
+{
+	struct hibmc_bo *hibmcbo = gem_to_hibmc_bo(obj);
+
+	hibmc_bo_unref(&hibmcbo);
+}
+
+static u64 hibmc_bo_mmap_offset(struct hibmc_bo *bo)
+{
+	return drm_vma_node_offset_addr(&bo->bo.vma_node);
+}
+
+int hibmc_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
+			   u32 handle, u64 *offset)
+{
+	struct drm_gem_object *obj;
+	struct hibmc_bo *bo;
+
+	obj = drm_gem_object_lookup(file, handle);
+	if (!obj)
+		return -ENOENT;
+
+	bo = gem_to_hibmc_bo(obj);
+	*offset = hibmc_bo_mmap_offset(bo);
+
+	drm_gem_object_unreference_unlocked(obj);
+	return 0;
+}
+
+static void hibmc_user_framebuffer_destroy(struct drm_framebuffer *fb)
+{
+	struct hibmc_framebuffer *hibmc_fb = to_hibmc_framebuffer(fb);
+
+	drm_gem_object_unreference_unlocked(hibmc_fb->obj);
+	drm_framebuffer_cleanup(fb);
+	kfree(hibmc_fb);
+}
+
+static const struct drm_framebuffer_funcs hibmc_fb_funcs = {
+	.destroy = hibmc_user_framebuffer_destroy,
+};
+
+struct hibmc_framebuffer *
+hibmc_framebuffer_init(struct drm_device *dev,
+		       const struct drm_mode_fb_cmd2 *mode_cmd,
+		       struct drm_gem_object *obj)
+{
+	struct hibmc_framebuffer *hibmc_fb;
+	int ret;
+
+	hibmc_fb = kzalloc(sizeof(*hibmc_fb), GFP_KERNEL);
+	if (!hibmc_fb) {
+		DRM_ERROR("failed to allocate hibmc_fb\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	drm_helper_mode_fill_fb_struct(&hibmc_fb->fb, mode_cmd);
+	hibmc_fb->obj = obj;
+	ret = drm_framebuffer_init(dev, &hibmc_fb->fb, &hibmc_fb_funcs);
+	if (ret) {
+		DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
+		kfree(hibmc_fb);
+		return ERR_PTR(ret);
+	}
+
+	return hibmc_fb;
+}
+
+static struct drm_framebuffer *
+hibmc_user_framebuffer_create(struct drm_device *dev,
+			      struct drm_file *filp,
+			      const struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	struct drm_gem_object *obj;
+	struct hibmc_framebuffer *hibmc_fb;
+
+	DRM_DEBUG_DRIVER("%dx%d, format %c%c%c%c\n",
+			 mode_cmd->width, mode_cmd->height,
+			 (mode_cmd->pixel_format) & 0xff,
+			 (mode_cmd->pixel_format >> 8)  & 0xff,
+			 (mode_cmd->pixel_format >> 16) & 0xff,
+			 (mode_cmd->pixel_format >> 24) & 0xff);
+
+	obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
+	if (!obj)
+		return ERR_PTR(-ENOENT);
+
+	hibmc_fb = hibmc_framebuffer_init(dev, mode_cmd, obj);
+	if (IS_ERR(hibmc_fb)) {
+		drm_gem_object_unreference_unlocked(obj);
+		return ERR_PTR((long)hibmc_fb);
+	}
+	return &hibmc_fb->fb;
+}
+
+const struct drm_mode_config_funcs hibmc_mode_funcs = {
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+	.fb_create = hibmc_user_framebuffer_create,
+};