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drm/hisilicon/hibmc: Use GEM VRAM's prepare_fb() and cleanup_fb() helpers 

This patch implements prepare_fb() and cleanup_fb() in hibmc with the
GEM VRAM helpers. In the current code, pinning the BO is performed by
hibmc_plane_atomic_update(), where the operation does not belong.

This patch also fixes a bug where the pinned BO was never unpinned.
Pinning multiple BOs would have exhaused the available VRAM and further
pin operations would have failed, leaving the display in a corrupt
state.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20191024081404.6978-4-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2019-10-24 10:14:03 +02:00
parent eddc0acfed
commit ecad80f086
1 changed files with 4 additions and 10 deletions
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14
drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
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@ -96,7 +96,6 @@ static void hibmc_plane_atomic_update(struct drm_plane *plane,
{
struct drm_plane_state *state = plane->state;
u32 reg;
int ret;
s64 gpu_addr = 0;
unsigned int line_l;
struct hibmc_drm_private *priv = plane->dev->dev_private;
@ -109,16 +108,9 @@ static void hibmc_plane_atomic_update(struct drm_plane *plane,
hibmc_fb = to_hibmc_framebuffer(state->fb);
gbo = drm_gem_vram_of_gem(hibmc_fb->obj);
ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM);
if (ret) {
DRM_ERROR("failed to pin bo: %d", ret);
return;
}
gpu_addr = drm_gem_vram_offset(gbo);
if (gpu_addr < 0) {
drm_gem_vram_unpin(gbo);
return;
}
if (WARN_ON_ONCE(gpu_addr < 0))
return; /* Bug: we didn't pin the BO to VRAM in prepare_fb. */
writel(gpu_addr, priv->mmio + HIBMC_CRT_FB_ADDRESS);
@ -157,6 +149,8 @@ static struct drm_plane_funcs hibmc_plane_funcs = {
};
static const struct drm_plane_helper_funcs hibmc_plane_helper_funcs = {
.prepare_fb = drm_gem_vram_plane_helper_prepare_fb,
.cleanup_fb = drm_gem_vram_plane_helper_cleanup_fb,
.atomic_check = hibmc_plane_atomic_check,
.atomic_update = hibmc_plane_atomic_update,
};