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dri3: implement get_drawable_modifiers - per-drawable modifiers

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Takes a DrawablePtr, format, and returns modifiers via num_modifiers and modifiers parameters
Returns TRUE on success, FALSE on allocation failure
Selects modifiers based on GPU family (GC 12.0.0+, GFX10+, GFX9+, or older)
Returns AMD-specific tiled modifiers (64K_S, 64K_D, 64K_2D) plus LINEAR

(cherry picked from commit 69becd71c29c98d97aa69a66246ca6bf6eeaf74f)
This commit is contained in:
Joseph Crowell
2026-02-05 13:18:09 +10:00
parent 8b68bf6b29
commit 9d9d961e09
3 changed files with 31 additions and 9 deletions
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28
src/amdgpu_dri3.c
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@@ -566,17 +566,28 @@ amdgpu_dri3_get_modifiers(ScreenPtr screen, uint32_t format,
return count;
}
static int
static Bool
amdgpu_dri3_get_drawable_modifiers(DrawablePtr draw, uint32_t format,
uint32_t *num_modifiers, uint64_t **modifiers)
{
ScrnInfoPtr scrn = xf86ScreenToScrn(draw->pScreen);
AMDGPUInfoPtr info = AMDGPUPTR(scrn);
ScrnInfoPtr scrn;
AMDGPUInfoPtr info;
uint64_t *mods;
uint32_t count;
int asic_family;
/* Get the ASIC family to determine which modifiers to advertise */
/* Validate input parameters */
if (!draw || !draw->pScreen || !num_modifiers || !modifiers)
return FALSE;
scrn = xf86ScreenToScrn(draw->pScreen);
if (!scrn)
return FALSE;
info = AMDGPUPTR(scrn);
if (!info)
return FALSE;
asic_family = info->family;
/* Determine which set of modifiers to return based on ASIC family.
@@ -636,15 +647,14 @@ static dri3_screen_info_rec amdgpu_dri3_screen_info = {
.version = 2,
.open = amdgpu_dri3_open,
.pixmap_from_fd = amdgpu_dri3_pixmap_from_fd,
// Version 1.1
/* Version 1.1 */
.fd_from_pixmap = amdgpu_dri3_fd_from_pixmap,
// Version 1.2
/* Version 1.2 */
.pixmap_from_fds = amdgpu_dri3_pixmap_from_fds,
.fds_from_pixmap = amdgpu_dri3_fds_from_pixmap,
.get_formats = amdgpu_dri3_get_formats,
.get_modifiers = amdgpu_dri3_get_modifiers,
.get_drawable_modifiers = amdgpu_dri3_get_drawable_modifiers
// Version 1.4
.get_modifiers = amdgpu_dri3_get_modifiers
/* Version 1.4 - get_drawable_modifiers set via glamor callback */
};
Bool

8
src/amdgpu_glamor.h
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@@ -80,4 +80,12 @@ extern int glamor_fds_from_pixmap(ScreenPtr screen, PixmapPtr pixmap, int *fds,
uint64_t *modifier);
#endif
/* DRI3 drawable modifiers callback */
#ifdef GBM_BO_WITH_MODIFIERS
extern Bool amdgpu_dri3_get_drawable_modifiers(DrawablePtr draw,
uint32_t format,
uint32_t *num_modifiers,
uint64_t **modifiers);
#endif
#endif /* AMDGPU_GLAMOR_H */

4
src/amdgpu_kms.c
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@@ -2038,6 +2038,10 @@ Bool AMDGPUScreenInit_KMS(ScreenPtr pScreen, int argc, char **argv)
if (amdgpu_glamor_init(pScreen)) {
xf86DrvMsg(pScrn->scrnIndex, X_INFO,
"Acceleration enabled\n");
#ifdef GBM_BO_WITH_MODIFIERS
glamor_set_drawable_modifiers_func(pScreen,
amdgpu_dri3_get_drawable_modifiers);
#endif
} else {
xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
"Acceleration initialization failed\n");