On Tue, Jan 03, 2023 at 03:12:15PM +0100, Thomas Zimmermann wrote: > > > Am 03.01.23 um 14:59 schrieb Maíra Canal: > > Currently, drm_gem_fb_create() doesn't check if the pixel format is > > supported, which can lead to the acceptance of invalid pixel formats > > e.g. the acceptance of invalid modifiers. Therefore, add a check for > > valid formats on drm_gem_fb_create(). > > > > Moreover, note that this check is only valid for atomic drivers, > > because, for non-atomic drivers, checking drm_any_plane_has_format() is > > not possible since the format list for the primary plane is fake, and > > we'd therefor reject valid formats. > > > > Suggested-by: Thomas Zimmermann <tzimmermann@xxxxxxx> > > Signed-off-by: Maíra Canal <mcanal@xxxxxxxxxx> > > Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx> See my previous replies, this is the wrong version :-) -Daniel > > > --- > > > > v1 -> v2: https://lore.kernel.org/dri-devel/20230103125322.855089-1-mcanal@xxxxxxxxxx/T/ > > - Check the modifier for each pixel plane in multi-plane formats (Thomas Zimmermann). > > - Use drm_dbg_kms() instead of drm_dbg() (Thomas Zimmermann). > > > > --- > > Documentation/gpu/todo.rst | 7 ++----- > > drivers/gpu/drm/drm_gem_framebuffer_helper.c | 13 +++++++++++++ > > 2 files changed, 15 insertions(+), 5 deletions(-) > > > > diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst > > index 1f8a5ebe188e..68bdafa0284f 100644 > > --- a/Documentation/gpu/todo.rst > > +++ b/Documentation/gpu/todo.rst > > @@ -276,11 +276,8 @@ Various hold-ups: > > - Need to switch to drm_fbdev_generic_setup(), otherwise a lot of the custom fb > > setup code can't be deleted. > > > > -- Many drivers wrap drm_gem_fb_create() only to check for valid formats. For > > - atomic drivers we could check for valid formats by calling > > - drm_plane_check_pixel_format() against all planes, and pass if any plane > > - supports the format. For non-atomic that's not possible since like the format > > - list for the primary plane is fake and we'd therefor reject valid formats. > > +- Need to switch to drm_gem_fb_create(), as now drm_gem_fb_create() checks for > > + valid formats for atomic drivers. > > > > - Many drivers subclass drm_framebuffer, we'd need a embedding compatible > > version of the varios drm_gem_fb_create functions. Maybe called > > diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c > > index e93533b86037..92d748f8553f 100644 > > --- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c > > +++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c > > @@ -9,6 +9,7 @@ > > #include <linux/module.h> > > > > #include <drm/drm_damage_helper.h> > > +#include <drm/drm_drv.h> > > #include <drm/drm_fourcc.h> > > #include <drm/drm_framebuffer.h> > > #include <drm/drm_gem.h> > > @@ -164,6 +165,18 @@ int drm_gem_fb_init_with_funcs(struct drm_device *dev, > > return -EINVAL; > > } > > > > + if (drm_drv_uses_atomic_modeset(dev)) { > > + for (i = 0; i < info->num_planes; i++) { > > + if (!drm_any_plane_has_format(dev, mode_cmd->pixel_format, > > + mode_cmd->modifier[i])) { > > + drm_dbg_kms(dev, > > + "Unsupported pixel format %p4cc / modifier 0x%llx\n", > > + &mode_cmd->pixel_format, mode_cmd->modifier[i]); > > + return -EINVAL; > > + } > > + } > > + } > > + > > for (i = 0; i < info->num_planes; i++) { > > unsigned int width = mode_cmd->width / (i ? info->hsub : 1); > > unsigned int height = mode_cmd->height / (i ? info->vsub : 1); > > -- > > 2.38.1 > > > > -- > Thomas Zimmermann > Graphics Driver Developer > SUSE Software Solutions Germany GmbH > Maxfeldstr. 5, 90409 Nürnberg, Germany > (HRB 36809, AG Nürnberg) > Geschäftsführer: Ivo Totev -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
