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drm/kms/fb: check for depth changes from userspace for resizing. 

If userspace (plymouth in this case) asks for a deeper depth,
refuse it as well due to lack of resizing.

This fixes an issue since < 32MB cards went to 8bpp and plymouth
crashes on startup.

Signed-off-by: Dave Airlie <airlied@redhat.com>
hifive-unleashed-5.1
Dave Airlie 2010-01-08 09:27:08 +10:00
parent 89347bb8ef
commit 509c7d83c3
1 changed files with 4 additions and 5 deletions
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9
drivers/gpu/drm/drm_fb_helper.c
View File

@ -606,11 +606,10 @@ int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
return -EINVAL;
/* Need to resize the fb object !!! */
if (var->xres > fb->width || var->yres > fb->height) {
DRM_ERROR("Requested width/height is greater than current fb "
"object %dx%d > %dx%d\n", var->xres, var->yres,
fb->width, fb->height);
DRM_ERROR("Need resizing code.\n");
if (var->bits_per_pixel > fb->bits_per_pixel || var->xres > fb->width || var->yres > fb->height) {
DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
"object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel,
fb->width, fb->height, fb->bits_per_pixel);
return -EINVAL;
}