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drm/gud: Get offset-adjusted mapping from drm_gem_fb_vmap() 

Pass the data parameter to drm_gem_fb_vmap() to retrieve pointers
to the data. This address is different from the mapping addresses
for framebuffers with non-zero offsets. Replaces gud's internal
computation.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-4-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2021-08-03 14:59:20 +02:00
parent add8b6a9a5
commit 6d463aaf56
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/gud/gud_pipe.c
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@ -153,6 +153,7 @@ static int gud_prep_flush(struct gud_device *gdrm, struct drm_framebuffer *fb,
struct dma_buf_attachment *import_attach = fb->obj[0]->import_attach; struct dma_buf_attachment *import_attach = fb->obj[0]->import_attach;
u8 compression = gdrm->compression; u8 compression = gdrm->compression;
struct dma_buf_map map[DRM_FORMAT_MAX_PLANES]; struct dma_buf_map map[DRM_FORMAT_MAX_PLANES];
struct dma_buf_map map_data[DRM_FORMAT_MAX_PLANES];
void *vaddr, *buf; void *vaddr, *buf;
size_t pitch, len; size_t pitch, len;
int ret = 0; int ret = 0;
@ -162,11 +163,11 @@ static int gud_prep_flush(struct gud_device *gdrm, struct drm_framebuffer *fb,
if (len > gdrm->bulk_len) if (len > gdrm->bulk_len)
return -E2BIG; return -E2BIG;
ret = drm_gem_fb_vmap(fb, map, NULL); ret = drm_gem_fb_vmap(fb, map, map_data);
if (ret) if (ret)
return ret; return ret;
vaddr = map[0].vaddr + fb->offsets[0]; vaddr = map_data[0].vaddr;
ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE); ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
if (ret) if (ret)