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drm/nouveau: 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. Align the pitch to a multiple of 256.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Cc: Karol Herbst <kherbst@redhat.com>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Link: https://lore.kernel.org/r/20250821081918.79786-15-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2025-08-21 10:17:21 +02:00
parent 538fa012cb
commit 7aff3a6be7
1 changed files with 4 additions and 3 deletions
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7
drivers/gpu/drm/nouveau/nouveau_display.c
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@ -30,6 +30,7 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_client_event.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_dumb_buffers.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_probe_helper.h>
@ -807,9 +808,9 @@ nouveau_display_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
uint32_t domain;
int ret;
args->pitch = roundup(args->width * (args->bpp / 8), 256);
args->size = args->pitch * args->height;
args->size = roundup(args->size, PAGE_SIZE);
ret = drm_mode_size_dumb(dev, args, SZ_256, 0);
if (ret)
return ret;
/* Use VRAM if there is any ; otherwise fallback to system memory */
if (nouveau_drm(dev)->client.device.info.ram_size != 0)