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drm/fsl-dcu: do not transfer registers on plane init

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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 <stefan@agner.ch>
Tested-By: Meng Yi <meng.yi@nxp.com>
This commit is contained in:
Stefan Agner 2016-10-04 16:56:38 -07:00
parent 8dedefbc38
commit b6ead864ea
1 changed files with 0 additions and 5 deletions
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5
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c
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@ -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)