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backend/drm: fail instead of stripping a modifier 

We shouldn't strip a modifiers from buffers, because the will make
the kernel re-interpret the data as LINEAR on most drivers,
resulting in an incorrect output on screen.
This commit is contained in:
Simon Ser 2021-04-23 16:05:16 +02:00 committed by Kenny Levinsen
parent 1a5530d14d
commit f9f90b4173
1 changed files with 8 additions and 0 deletions
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8
backend/drm/util.c
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@ -228,6 +228,14 @@ uint32_t get_fb_for_bo(struct gbm_bo *bo, bool with_modifiers) {
wlr_log_errno(WLR_ERROR, "Unable to add DRM framebuffer");
}
} else {
if (gbm_bo_get_modifier(bo) != DRM_FORMAT_MOD_INVALID &&
gbm_bo_get_modifier(bo) != DRM_FORMAT_MOD_LINEAR) {
wlr_log(WLR_ERROR, "Failed to add DRM frame-buffer: "
"BO has modifier 0x%"PRIX64" but KMS doesn't support modifiers",
gbm_bo_get_modifier(bo));
return 0;
}
if (drmModeAddFB2(fd, width, height, format, handles, strides,
offsets, &id, 0)) {
wlr_log_errno(WLR_DEBUG,