提交 e692da4d 编写于 作者: S Sascha Hauer 提交者: Greg Kroah-Hartman

staging: drm/imx: Add i.MX drm core support

This patch adds the i.MX glue stuff between i.MX and drm.
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
上级 f34170c7
......@@ -140,4 +140,6 @@ source "drivers/staging/silicom/Kconfig"
source "drivers/staging/ced1401/Kconfig"
source "drivers/staging/imx-drm/Kconfig"
endif # STAGING
......@@ -62,3 +62,4 @@ obj-$(CONFIG_OMAP_BANDGAP) += omap-thermal/
obj-$(CONFIG_ZCACHE2) += ramster/
obj-$(CONFIG_NET_VENDOR_SILICOM) += silicom/
obj-$(CONFIG_CED1401) += ced1401/
obj-$(CONFIG_DRM_IMX) += imx-drm/
config DRM_IMX
tristate "DRM Support for Freescale i.MX"
select DRM_KMS_HELPER
select DRM_GEM_CMA_HELPER
select DRM_KMS_CMA_HELPER
depends on DRM && ARCH_MXC
help
enable i.MX graphics support
config DRM_IMX_FB_HELPER
tristate "provide legacy framebuffer /dev/fb0"
select DRM_KMS_CMA_HELPER
depends on DRM_IMX
help
The DRM framework can provide a legacy /dev/fb0 framebuffer
for your device. This is necessary to get a framebuffer console
and also for appplications using the legacy framebuffer API
imxdrm-objs := imx-drm-core.o imx-fb.o
obj-$(CONFIG_DRM_IMX) += imxdrm.o
obj-$(CONFIG_DRM_IMX_FB_HELPER) += imx-fbdev.o
此差异已折叠。
#ifndef _IMX_DRM_H_
#define _IMX_DRM_H_
struct imx_drm_crtc;
struct drm_fbdev_cma;
struct imx_drm_crtc_helper_funcs {
int (*enable_vblank)(struct drm_crtc *crtc);
void (*disable_vblank)(struct drm_crtc *crtc);
int (*set_interface_pix_fmt)(struct drm_crtc *crtc, u32 encoder_type,
u32 pix_fmt);
const struct drm_crtc_helper_funcs *crtc_helper_funcs;
const struct drm_crtc_funcs *crtc_funcs;
};
int imx_drm_add_crtc(struct drm_crtc *crtc,
struct imx_drm_crtc **new_crtc,
const struct imx_drm_crtc_helper_funcs *imx_helper_funcs,
struct module *owner, void *cookie, int id);
int imx_drm_remove_crtc(struct imx_drm_crtc *);
int imx_drm_init_drm(struct platform_device *pdev,
int preferred_bpp);
int imx_drm_exit_drm(void);
int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc);
void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc);
void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc);
struct imx_drm_encoder;
int imx_drm_add_encoder(struct drm_encoder *encoder,
struct imx_drm_encoder **new_enc,
struct module *owner);
int imx_drm_remove_encoder(struct imx_drm_encoder *);
struct imx_drm_connector;
int imx_drm_add_connector(struct drm_connector *connector,
struct imx_drm_connector **new_con,
struct module *owner);
int imx_drm_remove_connector(struct imx_drm_connector *);
void imx_drm_mode_config_init(struct drm_device *drm);
struct drm_gem_cma_object *imx_drm_fb_get_obj(struct drm_framebuffer *fb);
struct drm_device *imx_drm_device_get(void);
void imx_drm_device_put(void);
int imx_drm_crtc_panel_format(struct drm_crtc *crtc, u32 encoder_type,
u32 interface_pix_fmt);
void imx_drm_fb_helper_set(struct drm_fbdev_cma *fbdev_helper);
struct device_node;
int imx_drm_encoder_get_mux_id(struct imx_drm_encoder *imx_drm_encoder,
struct drm_crtc *crtc);
int imx_drm_encoder_add_possible_crtcs(struct imx_drm_encoder *imx_drm_encoder,
struct device_node *np);
#endif /* _IMX_DRM_H_ */
/*
* i.MX drm driver
*
* Copyright (C) 2012 Sascha Hauer, Pengutronix
*
* Based on Samsung Exynos code
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
*
* 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.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/module.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include "imx-drm.h"
static struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
.fb_create = drm_fb_cma_create,
};
void imx_drm_mode_config_init(struct drm_device *dev)
{
dev->mode_config.min_width = 64;
dev->mode_config.min_height = 64;
/*
* set max width and height as default value(4096x4096).
* this value would be used to check framebuffer size limitation
* at drm_mode_addfb().
*/
dev->mode_config.max_width = 4096;
dev->mode_config.max_height = 4096;
dev->mode_config.funcs = &imx_drm_mode_config_funcs;
}
/*
* i.MX drm driver
*
* Copyright (C) 2012 Sascha Hauer, Pengutronix
*
* Based on Samsung Exynos code
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
*
* 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.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/module.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include "imx-drm.h"
#define MAX_CONNECTOR 4
#define PREFERRED_BPP 16
static struct drm_fbdev_cma *fbdev_cma;
static int legacyfb_depth = 16;
module_param(legacyfb_depth, int, 0444);
static int __init imx_fb_helper_init(void)
{
struct drm_device *drm = imx_drm_device_get();
if (!drm)
return -EINVAL;
if (legacyfb_depth != 16 && legacyfb_depth != 32) {
pr_warn("i.MX legacyfb: invalid legacyfb_depth setting. defaulting to 16bpp\n");
legacyfb_depth = 16;
}
fbdev_cma = drm_fbdev_cma_init(drm, legacyfb_depth,
drm->mode_config.num_crtc, MAX_CONNECTOR);
if (IS_ERR(fbdev_cma)) {
imx_drm_device_put();
return PTR_ERR(fbdev_cma);
}
imx_drm_fb_helper_set(fbdev_cma);
return 0;
}
static void __exit imx_fb_helper_exit(void)
{
imx_drm_fb_helper_set(NULL);
drm_fbdev_cma_fini(fbdev_cma);
imx_drm_device_put();
}
late_initcall(imx_fb_helper_init);
module_exit(imx_fb_helper_exit);
MODULE_DESCRIPTION("Freescale i.MX legacy fb driver");
MODULE_AUTHOR("Sascha Hauer, Pengutronix");
MODULE_LICENSE("GPL");
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