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drm/hibmc: Verify the framebuffer pitch to be a multiple of 128

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The hibmc hardware requires the framebuffer pitch to be aligned to
a multiple of 128. Dumb-buffer creation already guarantees this for
the created GEM buffer object. Also verify this contraint during
framebuffer creation.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Yongbang Shi <shiyongbang@huawei.com>
Link: https://patch.msgid.link/20260618123142.92298-6-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2026-06-18 14:28:43 +02:00
parent defd8ba932
commit 37690839f8
1 changed files with 17 additions and 1 deletions
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18
drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
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@ -14,6 +14,7 @@
#include <linux/aperture.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/sizes.h>
#include <drm/clients/drm_client_setup.h>
#include <drm/drm_atomic_helper.h>
@ -106,11 +107,26 @@ static const struct dev_pm_ops hibmc_pm_ops = {
hibmc_pm_resume)
};
static struct drm_framebuffer *hibmc_mode_config_fb_create(struct drm_device *dev,
struct drm_file *file_priv,
const struct drm_format_info *info,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
int i;
for (i = 0; i < info->num_planes; ++i) {
if (mode_cmd->pitches[i] % SZ_128)
return ERR_PTR(-EINVAL);
}
return drm_gem_fb_create(dev, file_priv, info, mode_cmd);
}
static const struct drm_mode_config_funcs hibmc_mode_funcs = {
.mode_valid = drm_vram_helper_mode_valid,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
.fb_create = drm_gem_fb_create,
.fb_create = hibmc_mode_config_fb_create,
};
static int hibmc_kms_init(struct hibmc_drm_private *priv)