omapdrm supports gamma via GAMMA_LUT property. However, the HW we have is:
gamma -> ctm -> out
instead of what the model DRM framework uses:
ctm -> gamma -> out
As the following patches add CTM support for omapdrm, lets first fix the gamma.
This patch changes the property from GAMMA_LUT to DEGAMMA_LUT, and uses drm_atomic_helper_legacy_degamma_set for gamma_set helper. Thus we will have:
degamma -> ctm -> out
and the legacy ioctl will continue working as before.
Signed-off-by: Tomi Valkeinen tomi.valkeinen@ti.com Reviewed-by: Pekka Paalanen pekka.paalanen@collabora.com --- drivers/gpu/drm/omapdrm/omap_crtc.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c index d7442aa55f89..d40220b2f312 100644 --- a/drivers/gpu/drm/omapdrm/omap_crtc.c +++ b/drivers/gpu/drm/omapdrm/omap_crtc.c @@ -575,8 +575,8 @@ static int omap_crtc_atomic_check(struct drm_crtc *crtc, crtc); struct drm_plane_state *pri_state;
- if (crtc_state->color_mgmt_changed && crtc_state->gamma_lut) { - unsigned int length = crtc_state->gamma_lut->length / + if (crtc_state->color_mgmt_changed && crtc_state->degamma_lut) { + unsigned int length = crtc_state->degamma_lut->length / sizeof(struct drm_color_lut);
if (length < 2) @@ -617,10 +617,10 @@ static void omap_crtc_atomic_flush(struct drm_crtc *crtc, struct drm_color_lut *lut = NULL; unsigned int length = 0;
- if (crtc->state->gamma_lut) { + if (crtc->state->degamma_lut) { lut = (struct drm_color_lut *) - crtc->state->gamma_lut->data; - length = crtc->state->gamma_lut->length / + crtc->state->degamma_lut->data; + length = crtc->state->degamma_lut->length / sizeof(*lut); } priv->dispc_ops->mgr_set_gamma(priv->dispc, omap_crtc->channel, @@ -741,7 +741,7 @@ static const struct drm_crtc_funcs omap_crtc_funcs = { .set_config = drm_atomic_helper_set_config, .destroy = omap_crtc_destroy, .page_flip = drm_atomic_helper_page_flip, - .gamma_set = drm_atomic_helper_legacy_gamma_set, + .gamma_set = drm_atomic_helper_legacy_degamma_set, .atomic_duplicate_state = omap_crtc_duplicate_state, .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, .atomic_set_property = omap_crtc_atomic_set_property, @@ -842,7 +842,7 @@ struct drm_crtc *omap_crtc_init(struct drm_device *dev, if (priv->dispc_ops->mgr_gamma_size(priv->dispc, channel)) { unsigned int gamma_lut_size = 256;
- drm_crtc_enable_color_mgmt(crtc, 0, false, gamma_lut_size); + drm_crtc_enable_color_mgmt(crtc, gamma_lut_size, false, 0); drm_mode_crtc_set_gamma_size(crtc, gamma_lut_size); }