Re: [PATCH v3 05/12] drm/bridge: ti-sn65dsi86: Move drm_panel_unprepare() to post_disable()

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Douglas Anderson <dianders@chromium.org>
Cc: Andrzej Hajda <a.hajda@samsung.com>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Jonas Karlman <jonas@kwiboo.se>,
	Jernej Skrabec <jernej.skrabec@siol.net>,
	Sam Ravnborg <sam@ravnborg.org>,
	Linus W <linus.walleij@linaro.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	robdclark@chromium.org, Stephen Boyd <swboyd@chromium.org>,
	Steev Klimaszewski <steev@kali.org>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	linux-arm-msm@vger.kernel.org,
	Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>,
	Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@linux.ie>,
	Robert Foss <robert.foss@linaro.org>,
	dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 05/12] drm/bridge: ti-sn65dsi86: Move drm_panel_unprepare() to post_disable()
Date: Mon, 5 Apr 2021 03:58:16 +0300	[thread overview]
Message-ID: <YGpgqJjpBPQ5//li@pendragon.ideasonboard.com> (raw)
In-Reply-To: <20210402152701.v3.5.Ia75c9ffe2a2582393a8532d244da86f18b4c9b21@changeid>

Hi Doug,

Thank you for the patch.

On Fri, Apr 02, 2021 at 03:28:39PM -0700, Douglas Anderson wrote:
> We prepared the panel in pre_enable() so we should unprepare it in
> post_disable() to match.
> 
> This becomes important once we start using pre_enable() and
> post_disable() to make sure things are powered on (and then off again)
> when reading the EDID.
> 
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> 
> (no changes since v1)
> 
>  drivers/gpu/drm/bridge/ti-sn65dsi86.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> index c006678c9921..e30460002c48 100644
> --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> @@ -452,8 +452,6 @@ static void ti_sn_bridge_disable(struct drm_bridge *bridge)
>  	regmap_write(pdata->regmap, SN_ML_TX_MODE_REG, 0);
>  	/* disable DP PLL */
>  	regmap_write(pdata->regmap, SN_PLL_ENABLE_REG, 0);
> -
> -	drm_panel_unprepare(pdata->panel);
>  }
>  
>  static u32 ti_sn_bridge_get_dsi_freq(struct ti_sn_bridge *pdata)
> @@ -869,6 +867,8 @@ static void ti_sn_bridge_post_disable(struct drm_bridge *bridge)
>  {
>  	struct ti_sn_bridge *pdata = bridge_to_ti_sn_bridge(bridge);
>  
> +	drm_panel_unprepare(pdata->panel);
> +
>  	clk_disable_unprepare(pdata->refclk);
>  
>  	pm_runtime_put_sync(pdata->dev);

-- 
Regards,

Laurent Pinchart