linux-kernel - [PATCH v2 05/12] drm/bridge/synopsys: dw-hdmi: Add deinit callback

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Message-Id: <20180110192512.19684-6-jernej.skrabec@siol.net>
Date:   Wed, 10 Jan 2018 20:25:05 +0100
From:   Jernej Skrabec <jernej.skrabec@...l.net>
To:     maxime.ripard@...e-electrons.com, airlied@...ux.ie,
        robh+dt@...nel.org, mark.rutland@....com, wens@...e.org,
        architt@...eaurora.org, a.hajda@...sung.com,
        Laurent.pinchart@...asonboard.com
Cc:     mturquette@...libre.com, sboyd@...eaurora.org,
        Jose.Abreu@...opsys.com, narmstrong@...libre.com,
        jernej.skrabec@...l.net, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: [PATCH v2 05/12] drm/bridge/synopsys: dw-hdmi: Add deinit callback

Some SoCs, like Allwinner A83T, have to do additional cleanup when
HDMI driver unloads. When using DW HDMI through DRM bridge API, there is
no place to store driver's private data so it can be accessed in unbind
function. Because of that, add deinit function which is called at the
very end, so drivers can do a proper cleanup.

Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 3 +++
 include/drm/bridge/dw_hdmi.h              | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 7d80f4b56683..1b7650f2b425 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2589,6 +2589,9 @@ static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
 		i2c_del_adapter(&hdmi->i2c->adap);
 	else
 		i2c_put_adapter(hdmi->ddc);
+
+	if (hdmi->plat_data->deinit)
+		hdmi->plat_data->deinit(hdmi->plat_data);
 }
 
 /* -----------------------------------------------------------------------------
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index 4a35e5065f6f..9ad83054a5dd 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -124,6 +124,7 @@ struct dw_hdmi_phy_ops {
 
 struct dw_hdmi_plat_data {
 	struct regmap *regm;
+	void (*deinit)(const struct dw_hdmi_plat_data *pdata);
 	enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
 					   const struct drm_display_mode *mode);
 	unsigned long input_bus_format;
-- 
2.15.1