[PATCH v5 13/36] drm/bridge: analogix_dp: Ensure edp is disabled when shutting down the panel

[Archit Taneja]

On Saturday 10 March 2018 03:53 AM, Enric Balletbo i Serra wrote:
> From: Lin Huang <hl at rock-chips.com>
> 
> When panel is shut down, we should make sure edp can be disabled to avoid
> undefined behavior.

Reviewed-by: Archit Taneja <architt at codeaurora.org>

Thanks,
Archit

> 
> Cc: Stéphane Marchesin <marcheu at chromium.org>
> Signed-off-by: Lin Huang <hl at rock-chips.com>
> Signed-off-by: zain wang <wzz at rock-chips.com>
> Signed-off-by: Sean Paul <seanpaul at chromium.org>
> Signed-off-by: Thierry Escande <thierry.escande at collabora.com>
> Reviewed-by: Andrzej Hajda <a.hajda at samsung.com>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo at collabora.com>
> Tested-by: Marek Szyprowski <m.szyprowski at samsung.com>
> ---
> 
>   drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 11 +++++++++++
>   1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> index 92fb9a072cb6..3a222e7e46ee 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -1160,6 +1160,12 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp)
>   
>   	pm_runtime_get_sync(dp->dev);
>   
> +	ret = clk_prepare_enable(dp->clock);
> +	if (ret < 0) {
> +		DRM_ERROR("Failed to prepare_enable the clock clk [%d]\n", ret);
> +		goto out_dp_clk_pre;
> +	}
> +
>   	if (dp->plat_data->power_on)
>   		dp->plat_data->power_on(dp->plat_data);
>   
> @@ -1191,6 +1197,8 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp)
>   	phy_power_off(dp->phy);
>   	if (dp->plat_data->power_off)
>   		dp->plat_data->power_off(dp->plat_data);
> +	clk_disable_unprepare(dp->clock);
> +out_dp_clk_pre:
>   	pm_runtime_put_sync(dp->dev);
>   
>   	return ret;
> @@ -1233,11 +1241,14 @@ static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
>   	}
>   
>   	disable_irq(dp->irq);
> +	analogix_dp_set_analog_power_down(dp, POWER_ALL, 1);
>   	phy_power_off(dp->phy);
>   
>   	if (dp->plat_data->power_off)
>   		dp->plat_data->power_off(dp->plat_data);
>   
> +	clk_disable_unprepare(dp->clock);
> +
>   	pm_runtime_put_sync(dp->dev);
>   
>   	ret = analogix_dp_prepare_panel(dp, false, true);
>