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| author | Javier Martinez Canillas <javierm@redhat.com> | 2022-09-27 11:52:49 +0200 |
|---|---|---|
| committer | Javier Martinez Canillas <javierm@redhat.com> | 2022-09-27 13:26:39 +0200 |
| commit | 09d6838f377e273e112bb20eba1e569c62e1ceb4 (patch) | |
| tree | 18f50df8558e9e5b4a7404308a704114899fb795 /drivers/gpu/drm/solomon | |
| parent | 30b1a0797e0bad14f95d349b43e3df3a157b83b6 (diff) | |
| download | lwn-09d6838f377e273e112bb20eba1e569c62e1ceb4.tar.gz lwn-09d6838f377e273e112bb20eba1e569c62e1ceb4.zip | |
drm/ssd130x: Synchronize access to dma-buf imported GEM BOs
Synchronize CPU access to GEM BOs with other drivers when updating the
screen buffer. Imported DMA buffers might otherwise contain stale data.
Suggested-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220927095249.1919385-1-javierm@redhat.com
Diffstat (limited to 'drivers/gpu/drm/solomon')
| -rw-r--r-- | drivers/gpu/drm/solomon/ssd130x.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/solomon/ssd130x.c b/drivers/gpu/drm/solomon/ssd130x.c index a537692100d1..bc41a5ae810a 100644 --- a/drivers/gpu/drm/solomon/ssd130x.c +++ b/drivers/gpu/drm/solomon/ssd130x.c @@ -555,11 +555,18 @@ static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb, const struct iosys_m if (!buf) return -ENOMEM; + ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE); + if (ret) + goto out_free; + iosys_map_set_vaddr(&dst, buf); drm_fb_xrgb8888_to_mono(&dst, &dst_pitch, vmap, fb, rect); + drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE); + ssd130x_update_rect(ssd130x, buf, rect); +out_free: kfree(buf); return ret; |