Update sw usage flags handling

Inspired by Rob Herring suggestion and gbm_gralloc implementation

Add missing support for GRALLOC_USAGE_SW_READ_OFTEN,
GRALLOC_USAGE_SW_WRITE_OFTEN usage flags
mapping them to PIPE_BIND_LINEAR

Fixes the mouse cursor and message panes artifacts
happening with gralloc_drm_pipe, tested with amdgpudrmfb
No observed regression on swrast llvmpipe

diff --git a/gralloc_drm_pipe.c b/gralloc_drm_pipe.c
index 16de013..dda4705 100644 (file)
--- a/gralloc_drm_pipe.c
+++ b/gralloc_drm_pipe.c
@@ -98,6 +98,8 @@ static unsigned get_pipe_bind(int usage)
 {
        unsigned bind = PIPE_BIND_SHARED;
 
+       if (usage & (GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN))
+               bind |= PIPE_BIND_LINEAR;
        if (usage & GRALLOC_USAGE_HW_TEXTURE)
                bind |= PIPE_BIND_SAMPLER_VIEW;
        if (usage & GRALLOC_USAGE_HW_RENDER)