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drm/ast: Support cursor buffers objects in I/O memory

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Copy the ARGB4444 cursor buffer to system memory if it is located in
I/O memory. While this cannot happen with ast's native GEM objects, an
imported buffer object might be on the external device's I/O memory.

If the cursor buffer is located in system memory continue to use it
directly.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>>
Link: https://patch.msgid.link/20251126094626.41985-3-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2025-11-26 10:40:09 +01:00
parent 1e759ed22a
commit ef4ed8621a
1 changed files with 14 additions and 1 deletions
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15
drivers/gpu/drm/ast/ast_cursor.c
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@ -191,7 +191,20 @@ static const u8 *ast_cursor_plane_get_argb4444(struct ast_cursor_plane *ast_curs
switch (fb->format->format) {
case DRM_FORMAT_ARGB4444:
argb4444 = shadow_plane_state->data[0].vaddr;
if (shadow_plane_state->data[0].is_iomem) {
struct iosys_map argb4444_dst[DRM_FORMAT_MAX_PLANES] = {
IOSYS_MAP_INIT_VADDR(ast_cursor_plane->argb4444),
};
unsigned int argb4444_dst_pitch[DRM_FORMAT_MAX_PLANES] = {
AST_HWC_PITCH,
};
drm_fb_memcpy(argb4444_dst, argb4444_dst_pitch,
shadow_plane_state->data, fb, clip);
argb4444 = argb4444_dst[0].vaddr;
} else {
argb4444 = shadow_plane_state->data[0].vaddr;
}
break;
case DRM_FORMAT_ARGB8888:
{