The kernel shouldn't accept invalid modes, just say No.
Signed-off-by: Damien Lespiau damien.lespiau@intel.com --- drivers/gpu/drm/drm_crtc.c | 3 +++ include/drm/drm_crtc.h | 2 ++ include/uapi/drm/drm_mode.h | 4 ++++ 3 files changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 2ce80ed..d7a8370 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -1319,6 +1319,9 @@ static int drm_crtc_convert_umode(struct drm_display_mode *out, if (in->clock > INT_MAX || in->vrefresh > INT_MAX) return -ERANGE;
+ if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) + return -EINVAL; + out->clock = in->clock; out->hdisplay = in->hdisplay; out->hsync_start = in->hsync_start; diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index eb6b8dc..50cedad 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -128,6 +128,8 @@ enum drm_mode_status { #define CRTC_INTERLACE_HALVE_V (1 << 0) /* halve V values for interlacing */ #define CRTC_STEREO_DOUBLE (1 << 1) /* adjust timings for stereo modes */
+#define DRM_MODE_FLAG_3D_MAX DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF + struct drm_display_mode { /* Header */ struct list_head head; diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index 7980f89..c2c4ace 100644 --- a/include/uapi/drm/drm_mode.h +++ b/include/uapi/drm/drm_mode.h @@ -58,6 +58,10 @@ #define DRM_MODE_FLAG_PIXMUX (1<<11) #define DRM_MODE_FLAG_DBLCLK (1<<12) #define DRM_MODE_FLAG_CLKDIV2 (1<<13) + /* + * When adding a new stereo mode don't forget to adjust DRM_MODE_FLAGS_3D_MAX + * (define not exposed to user space). + */ #define DRM_MODE_FLAG_3D_MASK (0x1f<<14) #define DRM_MODE_FLAG_3D_NONE (0<<14) #define DRM_MODE_FLAG_3D_FRAME_PACKING (1<<14)