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drm/vmwgfx: Compute dumb-buffer sizes with drm_mode_size_dumb()

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Call drm_mode_size_dumb() to compute dumb-buffer scanline pitch
and buffer size. No alignment required.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Zack Rusin <zack.rusin@broadcom.com>
Cc: Zack Rusin <zack.rusin@broadcom.com>
Cc: Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
Link: https://lore.kernel.org/r/20250821081918.79786-23-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2025-08-21 10:17:29 +02:00
parent 6fd37c99b8
commit 1a4a527f9d
1 changed files with 4 additions and 17 deletions
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21
drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
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@ -15,6 +15,7 @@
#include "vmw_surface_cache.h"
#include "device_include/svga3d_surfacedefs.h"
#include <drm/drm_dumb_buffers.h>
#include <drm/ttm/ttm_placement.h>
#define SVGA3D_FLAGS_64(upper32, lower32) (((uint64_t)upper32 << 32) | lower32)
@ -2267,23 +2268,9 @@ int vmw_dumb_create(struct drm_file *file_priv,
* contents is going to be rendered guest side.
*/
if (!dev_priv->has_mob || !vmw_supports_3d(dev_priv)) {
int cpp = DIV_ROUND_UP(args->bpp, 8);
switch (cpp) {
case 1: /* DRM_FORMAT_C8 */
case 2: /* DRM_FORMAT_RGB565 */
case 4: /* DRM_FORMAT_XRGB8888 */
break;
default:
/*
* Dumb buffers don't allow anything else.
* This is tested via IGT's dumb_buffers
*/
return -EINVAL;
}
args->pitch = args->width * cpp;
args->size = ALIGN(args->pitch * args->height, PAGE_SIZE);
ret = drm_mode_size_dumb(dev, args, 0, 0);
if (ret)
return ret;
ret = vmw_gem_object_create_with_handle(dev_priv, file_priv,
args->size, &args->handle,