[PATCH 10/41] drm/bridge: analogix_dp: Don't change psr while bridge is disabled

[Andrzej Hajda]

On 10.03.2017 05:32, Sean Paul wrote:
> From: zain wang <wzz at rock-chips.com>
>
> There is a race between AUX CH bring-up and enabling bridge which will
> cause link training to fail. To avoid hitting it, don't change psr state
> while enabling the bridge.
>
> Cc: Tomeu Vizoso <tomeu.vizoso at collabora.com>
> Cc: Sean Paul <seanpaul at chromium.org>
> Signed-off-by: zain wang <wzz at rock-chips.com>
> Signed-off-by: Caesar Wang <wxt at rock-chips.com>
> [seanpaul fixed up the commit message a bit and renamed *_supported to *_enabled]
> Signed-off-by: Sean Paul <seanpaul at chromium.org>

Hmm, beside resetting psr_enable in analogix_dp_bridge_disable I do not
see functional change, or am I blind?

Regards
Andrzej

> ---
>  drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 15 ++++++++-------
>  drivers/gpu/drm/bridge/analogix/analogix_dp_core.h |  2 +-
>  drivers/gpu/drm/rockchip/analogix_dp-rockchip.c    |  2 +-
>  include/drm/bridge/analogix_dp.h                   |  2 +-
>  4 files changed, 11 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> index 8a8f05fe9da3..64d94a34874d 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -98,20 +98,20 @@ static int analogix_dp_detect_hpd(struct analogix_dp_device *dp)
>  	return 0;
>  }
>  
> -int analogix_dp_psr_supported(struct device *dev)
> +int analogix_dp_psr_enabled(struct device *dev)
>  {
>  	struct analogix_dp_device *dp = dev_get_drvdata(dev);
>  
> -	return dp->psr_support;
> +	return dp->psr_enable;
>  }
> -EXPORT_SYMBOL_GPL(analogix_dp_psr_supported);
> +EXPORT_SYMBOL_GPL(analogix_dp_psr_enabled);
>  
>  int analogix_dp_enable_psr(struct device *dev)
>  {
>  	struct analogix_dp_device *dp = dev_get_drvdata(dev);
>  	struct edp_vsc_psr psr_vsc;
>  
> -	if (!dp->psr_support)
> +	if (!dp->psr_enable)
>  		return 0;
>  
>  	/* Prepare VSC packet as per EDP 1.4 spec, Table 6.9 */
> @@ -134,7 +134,7 @@ int analogix_dp_disable_psr(struct device *dev)
>  	struct edp_vsc_psr psr_vsc;
>  	int ret;
>  
> -	if (!dp->psr_support)
> +	if (!dp->psr_enable)
>  		return 0;
>  
>  	/* Prepare VSC packet as per EDP 1.4 spec, Table 6.9 */
> @@ -878,8 +878,8 @@ static void analogix_dp_commit(struct analogix_dp_device *dp)
>  	/* Enable video */
>  	analogix_dp_start_video(dp);
>  
> -	dp->psr_support = analogix_dp_detect_sink_psr(dp);
> -	if (dp->psr_support)
> +	dp->psr_enable = analogix_dp_detect_sink_psr(dp);
> +	if (dp->psr_enable)
>  		analogix_dp_enable_sink_psr(dp);
>  }
>  
> @@ -1120,6 +1120,7 @@ static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
>  	if (ret)
>  		DRM_ERROR("failed to setup the panel ret = %d\n", ret);
>  
> +	dp->psr_enable = false;
>  	dp->dpms_mode = DRM_MODE_DPMS_OFF;
>  }
>  
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
> index b039b28d8fcc..e135a42cb19e 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
> @@ -170,7 +170,7 @@ struct analogix_dp_device {
>  	int			dpms_mode;
>  	int			hpd_gpio;
>  	bool                    force_hpd;
> -	bool			psr_support;
> +	bool			psr_enable;
>  
>  	struct mutex		panel_lock;
>  	bool			panel_is_modeset;
> diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> index 64e7e2c0bc58..f44756029478 100644
> --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> @@ -83,7 +83,7 @@ static void analogix_dp_psr_set(struct drm_encoder *encoder, bool enabled)
>  	int vact_end;
>  	int ret;
>  
> -	if (!analogix_dp_psr_supported(dp->dev))
> +	if (!analogix_dp_psr_enabled(dp->dev))
>  		return;
>  
>  	dev_dbg(dp->dev, "%s PSR...\n", enabled ? "enable" : "disable");
> diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h
> index c99d6eaef1ac..4fc0165ed3f5 100644
> --- a/include/drm/bridge/analogix_dp.h
> +++ b/include/drm/bridge/analogix_dp.h
> @@ -38,7 +38,7 @@ struct analogix_dp_plat_data {
>  			 struct drm_connector *);
>  };
>  
> -int analogix_dp_psr_supported(struct device *dev);
> +int analogix_dp_psr_enabled(struct device *dev);
>  int analogix_dp_enable_psr(struct device *dev);
>  int analogix_dp_disable_psr(struct device *dev);
>