On Thu, Feb 15, 2018 at 12:32:56AM -0500, Daniele Castagna wrote: > From: "uma.shankar at intel.com (Uma Shankar)" <uma.shankar@xxxxxxxxx> > > Define a helper function to set legacy gamma table > size for planes. > > (am from https://patchwork.kernel.org/patch/9971343/) I don't see this used in the rest of the series. When it was originally introduced, it was accompanied by drm/i915: Enable plane color features, which seems to have been dropped. Sean > > Change-Id: I3d0c3e71d92300259cdfcebed4349207f64e4083 > Signed-off-by: Uma Shankar <uma.shankar at intel.com> > --- > drivers/gpu/drm/drm_color_mgmt.c | 41 ++++++++++++++++++++++++++++++++ > include/drm/drm_color_mgmt.h | 3 +++ > include/drm/drm_plane.h | 4 ++++ > 3 files changed, 48 insertions(+) > > diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c > index 0d002b045bd26..8f360b3ae0f24 100644 > --- a/drivers/gpu/drm/drm_color_mgmt.c > +++ b/drivers/gpu/drm/drm_color_mgmt.c > @@ -203,6 +203,47 @@ int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, > } > EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); > > +/** > + * drm_mode_plane_set_gamma_size - set the gamma table size > + * @plane: Plane to set the gamma table size for > + * @gamma_size: size of the gamma table > + * > + * Drivers which support gamma tables should set this to the supported gamma > + * table size when initializing the Plane. Currently the drm core only supports > + * a fixed gamma table size. > + * > + * Returns: > + * Zero on success, negative errno on failure. > + */ > +int drm_mode_plane_set_gamma_size(struct drm_plane *plane, > + int gamma_size) > +{ > + uint16_t *r_base, *g_base, *b_base; > + int i; > + > + plane->gamma_size = gamma_size; > + > + plane->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, > + GFP_KERNEL); > + if (!plane->gamma_store) { > + plane->gamma_size = 0; > + return -ENOMEM; > + } > + > + r_base = plane->gamma_store; > + g_base = r_base + gamma_size; > + b_base = g_base + gamma_size; > + for (i = 0; i < gamma_size; i++) { > + r_base[i] = i << 8; > + g_base[i] = i << 8; > + b_base[i] = i << 8; > + } > + > + > + return 0; > +} > +EXPORT_SYMBOL(drm_mode_plane_set_gamma_size); > + > /** > * drm_mode_gamma_set_ioctl - set the gamma table > * @dev: DRM device > diff --git a/include/drm/drm_color_mgmt.h b/include/drm/drm_color_mgmt.h > index 155a9ba38471c..2f59c820e148c 100644 > --- a/include/drm/drm_color_mgmt.h > +++ b/include/drm/drm_color_mgmt.h > @@ -42,4 +42,7 @@ void drm_plane_enable_color_mgmt(struct drm_plane *plane, > bool plane_has_ctm, > uint plane_gamma_lut_size); > > +int drm_mode_plane_set_gamma_size(struct drm_plane *plane, > + int plane_gamma_size); > + > #endif > diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h > index acabb85009a14..18d09eacbcd7d 100644 > --- a/include/drm/drm_plane.h > +++ b/include/drm/drm_plane.h > @@ -585,6 +585,10 @@ struct drm_plane { > > struct drm_property *zpos_property; > struct drm_property *rotation_property; > + > + /* Legacy FB Plane gamma size for reporting to userspace */ > + uint32_t gamma_size; > + uint16_t *gamma_store; > }; > > #define obj_to_plane(x) container_of(x, struct drm_plane, base) > -- > 2.16.1.291.g4437f3f132-goog > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Sean Paul, Software Engineer, Google / Chromium OS _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
