linux-kernel - [PATCH v2 3/5] drm/fsl-dcu: do not transfer registers in mode_set

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Date:   Wed,  5 Oct 2016 14:47:01 -0700
From:   Stefan Agner <stefan@...er.ch>
To:     meng.yi@....com, dri-devel@...ts.freedesktop.org
Cc:     alison.wang@...escale.com, jianwei.wang.chn@...il.com,
        linux-kernel@...r.kernel.org, Stefan Agner <stefan@...er.ch>
Subject: [PATCH v2 3/5] drm/fsl-dcu: do not transfer registers in mode_set_nofb

Do not schedule a transfer of mode settings early. Modes should
get applied on on CRTC enable where we also enable the pixel clock.

Signed-off-by: Stefan Agner <stefan@...er.ch>
---
 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
index 3371635..5ad1d68 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
@@ -116,8 +116,6 @@ static void fsl_dcu_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
 		     DCU_THRESHOLD_LS_BF_VS(BF_VS_VAL) |
 		     DCU_THRESHOLD_OUT_BUF_HIGH(BUF_MAX_VAL) |
 		     DCU_THRESHOLD_OUT_BUF_LOW(BUF_MIN_VAL));
-	regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
-		     DCU_UPDATE_MODE_READREG);
 	return;
 }
 
-- 
2.10.0