Re: [PATCH] drm/rockchip: vop: fix vop vsync/hsync polarity

[Caesar Wang]

Mark,

å 2015å01æ22æ 11:15, Mark Yao åé:
> Vop set wrong vsync/hsync polarity, it may cause some
> display problem. known problem is that caused HDMI hdcp
> authenticate failed, caused pixel offset with hdmi display.
> the polarity description at RK3288 TRM doc:
>    dsp_vsync_pol
>      VSYNC polarity
>        1'b0 : negative
>        1'b1 : positive
>        dsp_hsync_pol
>      HSYNC polarity
>        1'b0 : negative
>        1'b1 : positive
>
> Signed-off-by: Mark Yao <mark.yao@xxxxxxxxxxxxxx>
> ---
>   drivers/gpu/drm/rockchip/rockchip_drm_vop.c |    4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> index 9a5c571..2b145ba5 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> @@ -874,8 +874,8 @@ static int vop_crtc_mode_set(struct drm_crtc *crtc,
>   	VOP_CTRL_SET(vop, out_mode, vop->connector_out_mode);
>   
>   	val = 0x8;
> -	val |= (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC) ? 1 : 0;
> -	val |= (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC) ? (1 << 1) : 0;
> +	val |= (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC) ? 0 : 1;
> +	val |= (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC) ? 0 : (1 << 1);
Tested-by: Caesar Wang <wxt@xxxxxxxxxxxxxx>
>   	VOP_CTRL_SET(vop, pin_pol, val);
>   
>   	VOP_CTRL_SET(vop, htotal_pw, (htotal << 16) | hsync_len);


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