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Commit b7245cc5 authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

drm/uapi: Deprecate nonsense kms mode types 



BUILTIN, CRTC_C, CLOCK_C, and DEFULT mode types are unused. Let's
refuse to generate them or accept them from userspace either. A
cursory check didn't reveal any userspace code that would depend
on these.

v2: Recommend DRIVER instead of BUILTIN (ajax)

Cc: Jose Abreu <Jose.Abreu@synopsys.com>
Cc: Adam Jackson <ajax@redhat.com>
Cc: Keith Packard <keithp@keithp.com>
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: default avatarAdam Jackson <ajax@redhat.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171115154504.14338-1-ville.syrjala@linux.intel.com


Reviewed-by: default avatarJose Abreu <joabreu@synopsys.com>
parent 538af6cb

include/drm/drm_modes.h

+4 −3
Original line number Diff line number Diff line
@@ -242,8 +242,6 @@ struct drm_display_mode { 
	 * A bitmask of flags, mostly about the source of a mode. Possible flags

	 * are:

	 *

	 *  - DRM_MODE_TYPE_BUILTIN: Meant for hard-coded modes, effectively

	 *    unused.

	 *  - DRM_MODE_TYPE_PREFERRED: Preferred mode, usually the native

	 *    resolution of an LCD panel. There should only be one preferred

	 *    mode per connector at any given time.
@@ -253,8 +251,11 @@ struct drm_display_mode { 
	 *  - DRM_MODE_TYPE_USERDEF: Mode defined via kernel command line

	 *

	 * Plus a big list of flags which shouldn't be used at all, but are

	 * still around since these flags are also used in the userspace ABI:

	 * still around since these flags are also used in the userspace ABI.

	 * We no longer accept modes with these types though:

	 *

	 *  - DRM_MODE_TYPE_BUILTIN: Meant for hard-coded modes, unused.

	 *    Use DRM_MODE_TYPE_DRIVER instead.

	 *  - DRM_MODE_TYPE_DEFAULT: Again a leftover, use

	 *    DRM_MODE_TYPE_PREFERRED instead.

	 *  - DRM_MODE_TYPE_CLOCK_C and DRM_MODE_TYPE_CRTC_C: Define leftovers

include/uapi/drm/drm_mode.h

+5 −9
Original line number Diff line number Diff line
@@ -38,19 +38,15 @@ extern "C" { 
#define DRM_DISPLAY_MODE_LEN	32

#define DRM_PROP_NAME_LEN	32



#define DRM_MODE_TYPE_BUILTIN	(1<<0)

#define DRM_MODE_TYPE_CLOCK_C	((1<<1) | DRM_MODE_TYPE_BUILTIN)

#define DRM_MODE_TYPE_CRTC_C	((1<<2) | DRM_MODE_TYPE_BUILTIN)

#define DRM_MODE_TYPE_BUILTIN	(1<<0) /* deprecated */

#define DRM_MODE_TYPE_CLOCK_C	((1<<1) | DRM_MODE_TYPE_BUILTIN) /* deprecated */

#define DRM_MODE_TYPE_CRTC_C	((1<<2) | DRM_MODE_TYPE_BUILTIN) /* deprecated */

#define DRM_MODE_TYPE_PREFERRED	(1<<3)

#define DRM_MODE_TYPE_DEFAULT	(1<<4)

#define DRM_MODE_TYPE_DEFAULT	(1<<4) /* deprecated */

#define DRM_MODE_TYPE_USERDEF	(1<<5)

#define DRM_MODE_TYPE_DRIVER	(1<<6)



#define DRM_MODE_TYPE_ALL	(DRM_MODE_TYPE_BUILTIN |	\

				 DRM_MODE_TYPE_CLOCK_C |	\

				 DRM_MODE_TYPE_CRTC_C |		\

				 DRM_MODE_TYPE_PREFERRED |	\

				 DRM_MODE_TYPE_DEFAULT |	\

#define DRM_MODE_TYPE_ALL	(DRM_MODE_TYPE_PREFERRED |	\

				 DRM_MODE_TYPE_USERDEF |	\

				 DRM_MODE_TYPE_DRIVER)