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drm: add fallback drmModeAddFB for drivers which do not support drmModeAddFB2 

This makes wlroots able to run on some big-endian machines like G4 and
G5 systems with ATI Radeon 7500 AGP graphics.
This commit is contained in:
Ariadne Conill 2020-12-23 07:44:42 -07:00 committed by Simon Ser
parent c012d770f7
commit 23b6f3e3f5
1 changed files with 35 additions and 1 deletions
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36
backend/drm/util.c
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@ -170,6 +170,35 @@ const char *conn_get_name(uint32_t type_id) {
}
}
static uint32_t get_fb_for_bo_legacy(struct gbm_bo *bo) {
struct gbm_device *gbm = gbm_bo_get_device(bo);
/* We only support this as a fallback of last resort for ARGB8888 visuals,
* like xf86-video-modesetting does. This is necessary on BE machines. */
if (gbm_bo_get_format(bo) != GBM_FORMAT_ARGB8888 ||
gbm_bo_get_plane_count(bo) != 1) {
wlr_log(WLR_DEBUG,
"Invalid visual %x (%d planes) requested for legacy DRM framebuffer",
gbm_bo_get_format(bo), gbm_bo_get_plane_count(bo));
return 0;
}
int fd = gbm_device_get_fd(gbm);
uint32_t width = gbm_bo_get_width(bo);
uint32_t height = gbm_bo_get_height(bo);
uint32_t depth = 32;
uint32_t bpp = gbm_bo_get_bpp(bo);
uint32_t pitch = gbm_bo_get_stride(bo);
uint32_t handle = gbm_bo_get_handle(bo).u32;
uint32_t id = 0;
if (drmModeAddFB(fd, width, height, depth, bpp, pitch, handle, &id)) {
wlr_log_errno(WLR_ERROR, "Unable to add DRM framebuffer");
}
return id;
}
uint32_t get_fb_for_bo(struct gbm_bo *bo, bool with_modifiers) {
struct gbm_device *gbm = gbm_bo_get_device(bo);
@ -199,7 +228,12 @@ uint32_t get_fb_for_bo(struct gbm_bo *bo, bool with_modifiers) {
} else {
if (drmModeAddFB2(fd, width, height, format, handles, strides,
offsets, &id, 0)) {
wlr_log_errno(WLR_ERROR, "Unable to add DRM framebuffer");
wlr_log_errno(WLR_DEBUG,
"Unable to add DRM framebuffer, trying legacy method");
id = get_fb_for_bo_legacy(bo);
if (id == 0) {
wlr_log(WLR_ERROR, "Unable to add DRM framebuffer");
}
}
}