From b6ead864ea893ef55828be0ec0d6c10f7c1c4e30 Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Tue, 4 Oct 2016 16:56:38 -0700 Subject: [PATCH] drm/fsl-dcu: do not transfer registers on plane init There is no need to explicitly initiate a register transfer and turn off the DCU after initializing the plane registers. In fact, this is harmful and leads to unnecessary flickers if the DCU has been left on by the bootloader. Signed-off-by: Stefan Agner Tested-By: Meng Yi --- drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c index a7e5486bd1e9..9e6f7d8112b3 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c @@ -211,11 +211,6 @@ void fsl_dcu_drm_init_planes(struct drm_device *dev) for (j = 1; j <= fsl_dev->soc->layer_regs; j++) regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(i, j), 0); } - regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE, - DCU_MODE_DCU_MODE_MASK, - DCU_MODE_DCU_MODE(DCU_MODE_OFF)); - regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, - DCU_UPDATE_MODE_READREG); } struct drm_plane *fsl_dcu_drm_primary_create_plane(struct drm_device *dev) -- 2.20.1