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

Archit Taneja
2018-03-14T06:14:09Z

On Saturday 10 March 2018 03:53 AM, Enric Balletbo i Serra wrote:
> From: Lin Huang <hl@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@codeaurora.org>

Thanks,
Archit

>
> Cc: Stéphane Marchesin <marcheu@chromium.org>
> Signed-off-by: Lin Huang <hl@rock-chips.com>
> Signed-off-by: zain wang <wzz@rock-chips.com>
> Signed-off-by: Sean Paul <seanpaul@chromium.org>
> Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
> Tested-by: Marek Szyprowski <m.szyprowski@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);
>
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