As HW cursor BOs never move, we can store the offset in VRAM in the cursor-plane's HWC state. This removes the last possible source of runtime errors from atomic_update.
Signed-off-by: Thomas Zimmermann tzimmermann@suse.de --- drivers/gpu/drm/ast/ast_drv.h | 1 + drivers/gpu/drm/ast/ast_mode.c | 21 +++++++++++---------- 2 files changed, 12 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h index 22193cfde255..e82ab8628770 100644 --- a/drivers/gpu/drm/ast/ast_drv.h +++ b/drivers/gpu/drm/ast/ast_drv.h @@ -108,6 +108,7 @@ struct ast_cursor_plane { struct { struct drm_gem_vram_object *gbo; struct dma_buf_map map; + u64 off; } hwc[AST_DEFAULT_HWC_NUM];
unsigned int next_hwc_index; diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c index b9b9badcee00..e8de86d23805 100644 --- a/drivers/gpu/drm/ast/ast_mode.c +++ b/drivers/gpu/drm/ast/ast_mode.c @@ -823,26 +823,19 @@ ast_cursor_plane_helper_atomic_update(struct drm_plane *plane, struct drm_plane_state *state = plane->state; struct drm_framebuffer *fb = state->fb; struct ast_private *ast = to_ast_private(plane->dev); - struct drm_device *dev = &ast->base; - struct drm_gem_vram_object *gbo = - ast_cursor_plane->hwc[ast_cursor_plane->next_hwc_index].gbo; + u64 dst_off = + ast_cursor_plane->hwc[ast_cursor_plane->next_hwc_index].off; unsigned int offset_x, offset_y; - s64 off; struct dma_buf_map map; u16 x, y; u8 x_offset, y_offset; u8 __iomem *dst; u8 __iomem *sig;
- gbo = ast_cursor_plane->hwc[ast_cursor_plane->next_hwc_index].gbo; map = ast_cursor_plane->hwc[ast_cursor_plane->next_hwc_index].map;
if (state->fb != old_state->fb) { - /* A new cursor image was installed. */ - off = drm_gem_vram_offset(gbo); - if (drm_WARN_ON_ONCE(dev, off < 0)) - return; /* Bug: we didn't pin the cursor HW BO to VRAM. */ - ast_set_cursor_base(ast, off); + ast_set_cursor_base(ast, dst_off);
++ast_cursor_plane->next_hwc_index; ast_cursor_plane->next_hwc_index %= ARRAY_SIZE(ast_cursor_plane->hwc); @@ -931,6 +924,7 @@ static int ast_cursor_plane_init(struct ast_private *ast) struct drm_gem_vram_object *gbo; struct dma_buf_map map; int ret; + s64 off;
/* * Allocate backing storage for cursors. The BOs are permanently @@ -952,8 +946,14 @@ static int ast_cursor_plane_init(struct ast_private *ast) ret = drm_gem_vram_vmap(gbo, &map); if (ret) goto err_drm_gem_vram_unpin; + off = drm_gem_vram_offset(gbo); + if (off < 0) { + ret = off; + goto err_drm_gem_vram_vunmap; + } ast_cursor_plane->hwc[i].gbo = gbo; ast_cursor_plane->hwc[i].map = map; + ast_cursor_plane->hwc[i].off = off; }
/* @@ -979,6 +979,7 @@ static int ast_cursor_plane_init(struct ast_private *ast) --i; gbo = ast_cursor_plane->hwc[i].gbo; map = ast_cursor_plane->hwc[i].map; +err_drm_gem_vram_vunmap: drm_gem_vram_vunmap(gbo, &map); err_drm_gem_vram_unpin: drm_gem_vram_unpin(gbo);