diff options
author | Edmund Dea <edmund.j.dea@intel.com> | 2021-10-07 02:03:48 +0300 |
---|---|---|
committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2021-10-21 12:08:08 +0300 |
commit | 982f8ad666a1123028a077b6b009871a0dc9df26 (patch) | |
tree | 8844dc2a9756d783bd16d773a2b15e7825309630 /drivers/gpu/drm/kmb/kmb_plane.c | |
parent | 13047a092c6d3f23b7d684b5b3fe46b2b50423b9 (diff) | |
download | linux-982f8ad666a1123028a077b6b009871a0dc9df26.tar.xz |
drm/kmb: Disable change of plane parameters
Due to HW limitations, KMB cannot change height, width, or
pixel format after initial plane configuration.
v2: removed memset disp_cfg as it is already zero.
Fixes: 7f7b96a8a0a1 ("drm/kmb: Add support for KeemBay Display")
Signed-off-by: Edmund Dea <edmund.j.dea@intel.com>
Signed-off-by: Anitha Chrisanthus <anitha.chrisanthus@intel.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20211013233632.471892-4-anitha.chrisanthus@intel.com
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/kmb/kmb_plane.c')
-rw-r--r-- | drivers/gpu/drm/kmb/kmb_plane.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/drivers/gpu/drm/kmb/kmb_plane.c b/drivers/gpu/drm/kmb/kmb_plane.c index 06b0c42c9e91..00404ba4126d 100644 --- a/drivers/gpu/drm/kmb/kmb_plane.c +++ b/drivers/gpu/drm/kmb/kmb_plane.c @@ -67,8 +67,21 @@ static const u32 kmb_formats_v[] = { static unsigned int check_pixel_format(struct drm_plane *plane, u32 format) { + struct kmb_drm_private *kmb; + struct kmb_plane *kmb_plane = to_kmb_plane(plane); int i; + int plane_id = kmb_plane->id; + struct disp_cfg init_disp_cfg; + kmb = to_kmb(plane->dev); + init_disp_cfg = kmb->init_disp_cfg[plane_id]; + /* Due to HW limitations, changing pixel format after initial + * plane configuration is not supported. + */ + if (init_disp_cfg.format && init_disp_cfg.format != format) { + drm_dbg(&kmb->drm, "Cannot change format after initial plane configuration"); + return -EINVAL; + } for (i = 0; i < plane->format_count; i++) { if (plane->format_types[i] == format) return 0; @@ -81,11 +94,17 @@ static int kmb_plane_atomic_check(struct drm_plane *plane, { struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane); + struct kmb_drm_private *kmb; + struct kmb_plane *kmb_plane = to_kmb_plane(plane); + int plane_id = kmb_plane->id; + struct disp_cfg init_disp_cfg; struct drm_framebuffer *fb; int ret; struct drm_crtc_state *crtc_state; bool can_position; + kmb = to_kmb(plane->dev); + init_disp_cfg = kmb->init_disp_cfg[plane_id]; fb = new_plane_state->fb; if (!fb || !new_plane_state->crtc) return 0; @@ -99,6 +118,16 @@ static int kmb_plane_atomic_check(struct drm_plane *plane, new_plane_state->crtc_w < KMB_FB_MIN_WIDTH || new_plane_state->crtc_h < KMB_FB_MIN_HEIGHT) return -EINVAL; + + /* Due to HW limitations, changing plane height or width after + * initial plane configuration is not supported. + */ + if ((init_disp_cfg.width && init_disp_cfg.height) && + (init_disp_cfg.width != fb->width || + init_disp_cfg.height != fb->height)) { + drm_dbg(&kmb->drm, "Cannot change plane height or width after initial configuration"); + return -EINVAL; + } can_position = (plane->type == DRM_PLANE_TYPE_OVERLAY); crtc_state = drm_atomic_get_existing_crtc_state(state, @@ -335,6 +364,7 @@ static void kmb_plane_atomic_update(struct drm_plane *plane, unsigned char plane_id; int num_planes; static dma_addr_t addr[MAX_SUB_PLANES]; + struct disp_cfg *init_disp_cfg; if (!plane || !new_plane_state || !old_plane_state) return; @@ -357,7 +387,8 @@ static void kmb_plane_atomic_update(struct drm_plane *plane, } spin_unlock_irq(&kmb->irq_lock); - src_w = (new_plane_state->src_w >> 16); + init_disp_cfg = &kmb->init_disp_cfg[plane_id]; + src_w = new_plane_state->src_w >> 16; src_h = new_plane_state->src_h >> 16; crtc_x = new_plane_state->crtc_x; crtc_y = new_plane_state->crtc_y; @@ -500,6 +531,16 @@ static void kmb_plane_atomic_update(struct drm_plane *plane, /* Enable DMA */ kmb_write_lcd(kmb, LCD_LAYERn_DMA_CFG(plane_id), dma_cfg); + + /* Save initial display config */ + if (!init_disp_cfg->width || + !init_disp_cfg->height || + !init_disp_cfg->format) { + init_disp_cfg->width = width; + init_disp_cfg->height = height; + init_disp_cfg->format = fb->format->format; + } + drm_dbg(&kmb->drm, "dma_cfg=0x%x LCD_DMA_CFG=0x%x\n", dma_cfg, kmb_read_lcd(kmb, LCD_LAYERn_DMA_CFG(plane_id))); |