if there is no gamma function in the crtc display path, don't add gamma property for crtc Signed-off-by: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx> --- drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c index ca4fc47..9a8e1d4 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c @@ -734,6 +734,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev, int pipe = priv->num_pipes; int ret; int i; + uint gamma_lut_size = 0; if (!path) return 0; @@ -785,6 +786,9 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev, } mtk_crtc->ddp_comp[i] = comp; + + if (comp->funcs->gamma_set) + gamma_lut_size = MTK_LUT_SIZE; } for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) @@ -805,8 +809,10 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev, NULL, pipe); if (ret < 0) return ret; - drm_mode_crtc_set_gamma_size(&mtk_crtc->base, MTK_LUT_SIZE); - drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, MTK_LUT_SIZE); + + if (gamma_lut_size) + drm_mode_crtc_set_gamma_size(&mtk_crtc->base, gamma_lut_size); + drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, gamma_lut_size); priv->num_pipes++; mutex_init(&mtk_crtc->hw_lock); -- 1.8.1.1.dirty
