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modesetting: Create the front buffer with GBM_BO_USE_FRONT_RENDERING

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Also renamed `drmmode_create_bo` to `drmmode_create_front_bo`,
better reflecting how it is used.

According to the mesa docs: https://gitlab.freedesktop.org/mesa/mesa/-/blob/main/src/gbm/main/gbm.h :
```
   /**
    * The buffer will be used for front buffer rendering.  On some
    * platforms this may (for example) disable framebuffer compression
    * to avoid problems with compression flags data being out of sync
    * with pixel data.
    */
   GBM_BO_USE_FRONT_RENDERING = (1 << 6),
```

Signed-off-by: stefan11111 <stefan11111@shitposting.expert>
This commit is contained in:
stefan11111
2025-11-08 14:09:31 +02:00
committed by Enrico Weigelt
parent 7a8f12361d
commit 8bb2fc9d76
1 changed files with 15 additions and 8 deletions
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23
hw/xfree86/drivers/video/modesetting/drmmode_display.c
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@@ -1126,8 +1126,8 @@ drmmode_bo_import(drmmode_ptr drmmode, drmmode_bo *bo,
}
static Bool
drmmode_create_bo(drmmode_ptr drmmode, drmmode_bo *bo,
unsigned width, unsigned height, unsigned bpp)
drmmode_create_front_bo(drmmode_ptr drmmode, drmmode_bo *bo,
unsigned width, unsigned height, unsigned bpp)
{
bo->width = width;
bo->height = height;
@@ -1151,6 +1151,10 @@ drmmode_create_bo(drmmode_ptr drmmode, drmmode_bo *bo,
break;
}
#ifndef GBM_BO_USE_FRONT_RENDERING
#define GBM_BO_USE_FRONT_RENDERING 0
#endif
#ifdef GBM_BO_WITH_MODIFIERS
uint32_t num_modifiers;
uint64_t *modifiers = NULL;
@@ -1160,7 +1164,8 @@ drmmode_create_bo(drmmode_ptr drmmode, drmmode_bo *bo,
#ifdef GBM_BO_WITH_MODIFIERS2
bo->gbm = gbm_bo_create_with_modifiers2(drmmode->gbm, width, height,
format, modifiers, num_modifiers,
GBM_BO_USE_RENDERING | GBM_BO_USE_SCANOUT);
GBM_BO_USE_RENDERING | GBM_BO_USE_SCANOUT |
GBM_BO_USE_FRONT_RENDERING);
#else
bo->gbm = gbm_bo_create_with_modifiers(drmmode->gbm, width, height,
format, modifiers,
@@ -1175,7 +1180,8 @@ drmmode_create_bo(drmmode_ptr drmmode, drmmode_bo *bo,
#endif
bo->gbm = gbm_bo_create(drmmode->gbm, width, height, format,
GBM_BO_USE_RENDERING | GBM_BO_USE_SCANOUT);
GBM_BO_USE_RENDERING | GBM_BO_USE_SCANOUT |
GBM_BO_USE_FRONT_RENDERING);
bo->used_modifiers = FALSE;
return bo->gbm != NULL;
}
@@ -2238,7 +2244,8 @@ drmmode_shadow_fb_allocate(xf86CrtcPtr crtc, int width, int height,
drmmode_ptr drmmode = drmmode_crtc->drmmode;
int ret;
if (!drmmode_create_bo(drmmode, bo, width, height, drmmode->kbpp)) {
/* If we're using shadow fb, we're not using glamor, so no gbm bo's */
if (!drmmode_create_front_bo(drmmode, bo, width, height, drmmode->kbpp)) {
xf86DrvMsg(crtc->scrn->scrnIndex, X_ERROR,
"Couldn't allocate shadow memory for rotated CRTC\n");
return NULL;
@@ -3942,8 +3949,8 @@ drmmode_xf86crtc_resize(ScrnInfoPtr scrn, int width, int height)
old_fb_id = drmmode->fb_id;
drmmode->fb_id = 0;
if (!drmmode_create_bo(drmmode, &drmmode->front_bo,
width, height, drmmode->kbpp))
if (!drmmode_create_front_bo(drmmode, &drmmode->front_bo,
width, height, drmmode->kbpp))
goto fail;
pitch = drmmode_bo_get_pitch(&drmmode->front_bo);
@@ -4827,7 +4834,7 @@ drmmode_create_initial_bos(ScrnInfoPtr pScrn, drmmode_ptr drmmode)
width = pScrn->virtualX;
height = pScrn->virtualY;
if (!drmmode_create_bo(drmmode, &drmmode->front_bo, width, height, bpp))
if (!drmmode_create_front_bo(drmmode, &drmmode->front_bo, width, height, bpp))
return FALSE;
pScrn->displayWidth = drmmode_bo_get_pitch(&drmmode->front_bo) / cpp;