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Merge branch 'sand128' into 'main'

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Draft: backend-drm: Implement DRM_FORMAT_MOD_BROADCOM_SAND128 support

See merge request wayland/weston!1640
This commit is contained in:
Robert Mader 2026-04-30 12:37:43 +02:00
commit a2638e04a4
1 changed files with 21 additions and 2 deletions
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23
libweston/backend-drm/fb.c
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@ -244,13 +244,32 @@ drm_fb_addfb(struct drm_device *device, struct drm_fb *fb)
/* If we have a modifier set, we must only use the WithModifiers
* entrypoint; we cannot import it through legacy ioctls. */
if (device->fb_modifiers && fb->modifier != DRM_FORMAT_MOD_INVALID) {
uint32_t strides[4] = { };
uint64_t modifier;
modifier = fb->modifier;
for (i = 0; i < ARRAY_LENGTH(strides) && fb->handles[i]; i++)
strides[i] = fb->strides[i];
if (fourcc_mod_broadcom_mod(modifier) == DRM_FORMAT_MOD_BROADCOM_SAND128) {
uint32_t stride_multiplicator;
modifier =
DRM_FORMAT_MOD_BROADCOM_SAND128_COL_HEIGHT (strides[0]);
stride_multiplicator =
fb->format->format == DRM_FORMAT_NV12 ? 1 : 2;
for (i = 0; i < ARRAY_LENGTH(strides) && strides[i]; i++)
strides[i] = fb->width * stride_multiplicator;
}
/* KMS demands that if a modifier is set, it must be the same
* for all planes. */
for (i = 0; i < ARRAY_LENGTH(mods) && fb->handles[i]; i++)
mods[i] = fb->modifier;
mods[i] = modifier;
ret = drmModeAddFB2WithModifiers(fb->fd, fb->width, fb->height,
fb->format->format,
fb->handles, fb->strides,
fb->handles, strides,
fb->offsets, mods, &fb->fb_id,
DRM_MODE_FB_MODIFIERS);
return ret;