From 893898f583f0ce4415e1b74399a14632c43a7bbe Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Thu, 6 Apr 2017 23:01:07 +0800 Subject: [PATCH] drm: zte: do not enable clock auto-gating by default Some VOU modules do not work well with clock auto-gating. For example, VGA I2C bus will fail to read EDID data from monitor. Let's not enable this feature by default, and leave it to the possible future low-power optimization. Signed-off-by: Shawn Guo Reviewed-by: Sean Paul Acked-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1491490870-6330-2-git-send-email-shawnguo@kernel.org --- drivers/gpu/drm/zte/zx_vou.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/gpu/drm/zte/zx_vou.c b/drivers/gpu/drm/zte/zx_vou.c index b500c8dd0d9d..5145215b4600 100644 --- a/drivers/gpu/drm/zte/zx_vou.c +++ b/drivers/gpu/drm/zte/zx_vou.c @@ -705,9 +705,6 @@ static void vou_hw_init(struct zx_vou_hw *vou) /* Release reset for all VOU modules */ zx_writel(vou->vouctl + VOU_SOFT_RST, ~0); - /* Enable clock auto-gating for all VOU modules */ - zx_writel(vou->vouctl + VOU_CLK_REQEN, ~0); - /* Enable all VOU module clocks */ zx_writel(vou->vouctl + VOU_CLK_EN, ~0); -- 2.20.1