/* * ARC PGU DRM driver. * * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * 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 #include #include #include #include #include #include #include "arcpgu.h" #include "arcpgu_regs.h" #define ENCODE_PGU_XY(x, y) ((((x) - 1) << 16) | ((y) - 1)) static struct simplefb_format supported_formats[] = { { "r5g6b5", 16, {11, 5}, {5, 6}, {0, 5}, {0, 0}, DRM_FORMAT_RGB565 }, { "r8g8b8", 24, {16, 8}, {8, 8}, {0, 8}, {0, 0}, DRM_FORMAT_RGB888 }, }; static void arc_pgu_set_pxl_fmt(struct drm_crtc *crtc) { struct arcpgu_drm_private *arcpgu = crtc_to_arcpgu_priv(crtc); const struct drm_framebuffer *fb = crtc->primary->state->fb; uint32_t pixel_format = fb->format->format; struct simplefb_format *format = NULL; int i; for (i = 0; i < ARRAY_SIZE(supported_formats); i++) { if (supported_formats[i].fourcc == pixel_format) format = &supported_formats[i]; } if (WARN_ON(!format)) return; if (format->fourcc == DRM_FORMAT_RGB888) arc_pgu_write(arcpgu, ARCPGU_REG_CTRL, arc_pgu_read(arcpgu, ARCPGU_REG_CTRL) | ARCPGU_MODE_RGB888_MASK); } static const struct drm_crtc_funcs arc_pgu_crtc_funcs = { .destroy = drm_crtc_cleanup, .set_config = drm_atomic_helper_set_config, .page_flip = drm_atomic_helper_page_flip, .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 enum drm_mode_status arc_pgu_crtc_mode_valid(struct drm_crtc *crtc, const struct drm_display_mode *mode) { struct arcpgu_drm_private *arcpgu = crtc_to_arcpgu_priv(crtc); long rate, clk_rate = mode->clock * 1000; rate = clk_round_rate(arcpgu->clk, clk_rate); if (rate != clk_rate) return MODE_NOCLOCK; return MODE_OK; } static void arc_pgu_crtc_mode_set_nofb(struct drm_crtc *crtc) { struct arcpgu_drm_private *arcpgu = crtc_to_arcpgu_priv(crtc); struct drm_display_mode *m = &crtc->state->adjusted_mode; u32 val; arc_pgu_write(arcpgu, ARCPGU_REG_FMT, ENCODE_PGU_XY(m->crtc_htotal, m->crtc_vtotal)); arc_pgu_write(arcpgu, ARCPGU_REG_HSYNC, ENCODE_PGU_XY(m->crtc_hsync_start - m->crtc_hdisplay, m->crtc_hsync_end - m->crtc_hdisplay)); arc_pgu_write(arcpgu, ARCPGU_REG_VSYNC, ENCODE_PGU_XY(m->crtc_vsync_start - m->crtc_vdisplay, m->crtc_vsync_end - m->crtc_vdisplay)); arc_pgu_write(arcpgu, ARCPGU_REG_ACTIVE, ENCODE_PGU_XY(m->crtc_hblank_end - m->crtc_hblank_start, m->crtc_vblank_end - m->crtc_vblank_start)); val = arc_pgu_read(arcpgu, ARCPGU_REG_CTRL); if (m->flags & DRM_MODE_FLAG_PVSYNC) val |= ARCPGU_CTRL_VS_POL_MASK << ARCPGU_CTRL_VS_POL_OFST; else val &= ~(ARCPGU_CTRL_VS_POL_MASK << ARCPGU_CTRL_VS_POL_OFST); if (m->flags & DRM_MODE_FLAG_PHSYNC) val |= ARCPGU_CTRL_HS_POL_MASK << ARCPGU_CTRL_HS_POL_OFST; else val &= ~(ARCPGU_CTRL_HS_POL_MASK << ARCPGU_CTRL_HS_POL_OFST); arc_pgu_write(arcpgu, ARCPGU_REG_CTRL, val); arc_pgu_write(arcpgu, ARCPGU_REG_STRIDE, 0); arc_pgu_write(arcpgu, ARCPGU_REG_START_SET, 1); arc_pgu_set_pxl_fmt(crtc); clk_set_rate(arcpgu->clk, m->crtc_clock * 1000); } static void arc_pgu_crtc_enable(struct drm_crtc *crtc) { struct arcpgu_drm_private *arcpgu = crtc_to_arcpgu_priv(crtc); clk_prepare_enable(arcpgu->clk); arc_pgu_write(arcpgu, ARCPGU_REG_CTRL, arc_pgu_read(arcpgu, ARCPGU_REG_CTRL) | ARCPGU_CTRL_ENABLE_MASK); } static void arc_pgu_crtc_disable(struct drm_crtc *crtc) { struct arcpgu_drm_private *arcpgu = crtc_to_arcpgu_priv(crtc); if (!crtc->primary->fb) return; clk_disable_unprepare(arcpgu->clk); arc_pgu_write(arcpgu, ARCPGU_REG_CTRL, arc_pgu_read(arcpgu, ARCPGU_REG_CTRL) & ~ARCPGU_CTRL_ENABLE_MASK); } static void arc_pgu_crtc_atomic_begin(struct drm_crtc *crtc, struct drm_crtc_state *state) { struct drm_pending_vblank_event *event = crtc->state->event; if (event) { crtc->state->event = NULL; spin_lock_irq(&crtc->dev->event_lock); drm_crtc_send_vblank_event(crtc, event); spin_unlock_irq(&crtc->dev->event_lock); } } static const struct drm_crtc_helper_funcs arc_pgu_crtc_helper_funcs = { .mode_valid = arc_pgu_crtc_mode_valid, .mode_set = drm_helper_crtc_mode_set, .mode_set_base = drm_helper_crtc_mode_set_base, .mode_set_nofb = arc_pgu_crtc_mode_set_nofb, .enable = arc_pgu_crtc_enable, .disable = arc_pgu_crtc_disable, .prepare = arc_pgu_crtc_disable, .atomic_begin = arc_pgu_crtc_atomic_begin, }; static void arc_pgu_plane_atomic_update(struct drm_plane *plane, struct drm_plane_state *state) { struct arcpgu_drm_private *arcpgu; struct drm_gem_cma_object *gem; if (!plane->state->crtc || !plane->state->fb) return; arcpgu = crtc_to_arcpgu_priv(plane->state->crtc); gem = drm_fb_cma_get_gem_obj(plane->state->fb, 0); arc_pgu_write(arcpgu, ARCPGU_REG_BUF0_ADDR, gem->paddr); } static const struct drm_plane_helper_funcs arc_pgu_plane_helper_funcs = { .atomic_update = arc_pgu_plane_atomic_update, }; static void arc_pgu_plane_destroy(struct drm_plane *plane) { drm_plane_helper_disable(plane); drm_plane_cleanup(plane); } static const struct drm_plane_funcs arc_pgu_plane_funcs = { .update_plane = drm_atomic_helper_update_plane, .disable_plane = drm_atomic_helper_disable_plane, .destroy = arc_pgu_plane_destroy, .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 struct drm_plane *arc_pgu_plane_init(struct drm_device *drm) { struct arcpgu_drm_private *arcpgu = drm->dev_private; struct drm_plane *plane = NULL; u32 formats[ARRAY_SIZE(supported_formats)], i; int ret; plane = devm_kzalloc(drm->dev, sizeof(*plane), GFP_KERNEL); if (!plane) return ERR_PTR(-ENOMEM); for (i = 0; i < ARRAY_SIZE(supported_formats); i++) formats[i] = supported_formats[i].fourcc; ret = drm_universal_plane_init(drm, plane, 0xff, &arc_pgu_plane_funcs, formats, ARRAY_SIZE(formats), DRM_PLANE_TYPE_PRIMARY, NULL); if (ret) return ERR_PTR(ret); drm_plane_helper_add(plane, &arc_pgu_plane_helper_funcs); arcpgu->plane = plane; return plane; } int arc_pgu_setup_crtc(struct drm_device *drm) { struct arcpgu_drm_private *arcpgu = drm->dev_private; struct drm_plane *primary; int ret; primary = arc_pgu_plane_init(drm); if (IS_ERR(primary)) return PTR_ERR(primary); ret = drm_crtc_init_with_planes(drm, &arcpgu->crtc, primary, NULL, &arc_pgu_crtc_funcs, NULL); if (ret) { arc_pgu_plane_destroy(primary); return ret; } drm_crtc_helper_add(&arcpgu->crtc, &arc_pgu_crtc_helper_funcs); return 0; }