linux-kernel - [PATCH RFC 07/13] drm: bridge: inno_hdmi: Add .disable platform operation

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Message-Id: <20251108-jh7110-clean-send-v1-7-06bf43bb76b1@samsung.com>
Date: Sat, 08 Nov 2025 02:04:41 +0100
From: Michal Wilczynski <m.wilczynski@...sung.com>
To: Michal Wilczynski <m.wilczynski@...sung.com>,  Conor Dooley
	<conor@...nel.org>, Rob Herring <robh@...nel.org>,  Krzysztof Kozlowski
	<krzk+dt@...nel.org>,  Emil Renner Berthing <kernel@...il.dk>,  Hal Feng
	<hal.feng@...rfivetech.com>,  Michael Turquette <mturquette@...libre.com>, 
	Stephen Boyd <sboyd@...nel.org>, Conor Dooley <conor+dt@...nel.org>,  Xingyu
	Wu <xingyu.wu@...rfivetech.com>, Vinod Koul <vkoul@...nel.org>,  Kishon
	Vijay Abraham I <kishon@...nel.org>,  Andrzej Hajda
	<andrzej.hajda@...el.com>,  Neil Armstrong <neil.armstrong@...aro.org>,
	Robert Foss <rfoss@...nel.org>,  Laurent Pinchart
	<Laurent.pinchart@...asonboard.com>,  Jonas Karlman <jonas@...boo.se>,
	Jernej Skrabec <jernej.skrabec@...il.com>,  David Airlie
	<airlied@...il.com>, Simona Vetter <simona@...ll.ch>,  Maarten Lankhorst
	<maarten.lankhorst@...ux.intel.com>,  Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,  Lee Jones <lee@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,  Paul Walmsley
	<paul.walmsley@...ive.com>,  Palmer Dabbelt <palmer@...belt.com>, Albert Ou
	<aou@...s.berkeley.edu>,  Alexandre Ghiti <alex@...ti.fr>,  Marek Szyprowski
	<m.szyprowski@...sung.com>, Icenowy Zheng <uwu@...nowy.me>,  Maud Spierings
	<maudspierings@...ontroll.com>, Andy Yan <andyshrk@....com>,  Heiko Stuebner
	<heiko@...ech.de>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-clk@...r.kernel.org, linux-phy@...ts.infradead.org, 
	dri-devel@...ts.freedesktop.org, linux-riscv@...ts.infradead.org
Subject: [PATCH RFC 07/13] drm: bridge: inno_hdmi: Add .disable platform
 operation

The Innosilicon HDMI driver supports platform-specific behavior through
the `inno_hdmi_plat_ops`. While it provides an `.enable` hook for
platform-specific power up sequences (like enabling PHYs), it lacks a
corresponding hook for power down.

This patch adds a new `.disable` op to the `inno_hdmi_plat_ops` struct
and calls it at the beginning of `inno_hdmi_bridge_atomic_disable()`.

This allows platform specific drivers, such as the StarFive JH7110,
to implement their own power down sequence (e.g., calling
phy_power_off() and clk_disable_unprepare()).

Signed-off-by: Michal Wilczynski <m.wilczynski@...sung.com>
---
 drivers/gpu/drm/bridge/inno-hdmi.c | 4 ++++
 include/drm/bridge/inno_hdmi.h     | 1 +
 2 files changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/bridge/inno-hdmi.c b/drivers/gpu/drm/bridge/inno-hdmi.c
index 9a2370ed2f208caf3dafb4a4d8884516d489263c..37ed7169bfce755cc5bddca16c78d4f112ea33e6 100644
--- a/drivers/gpu/drm/bridge/inno-hdmi.c
+++ b/drivers/gpu/drm/bridge/inno-hdmi.c
@@ -887,6 +887,10 @@ static void inno_hdmi_bridge_atomic_disable(struct drm_bridge *bridge,
 					    struct drm_atomic_state *state)
 {
 	struct inno_hdmi *hdmi = bridge_to_inno_hdmi(bridge);
+	const struct inno_hdmi_plat_ops *plat_ops = hdmi->plat_data->ops;
+
+	if (plat_ops && plat_ops->disable)
+		plat_ops->disable(hdmi->dev);
 
 	inno_hdmi_standby(hdmi);
 }
diff --git a/include/drm/bridge/inno_hdmi.h b/include/drm/bridge/inno_hdmi.h
index 019680622324197e046a1c606ec25aabe95537b4..ca554c525fd6bf63a4a8b9721e967bc473492f0a 100644
--- a/include/drm/bridge/inno_hdmi.h
+++ b/include/drm/bridge/inno_hdmi.h
@@ -16,6 +16,7 @@ struct inno_hdmi_i2c;
 
 struct inno_hdmi_plat_ops {
 	void (*enable)(struct device *pdev, struct drm_display_mode *mode);
+	void (*disable)(struct device *pdev);
 };
 
 struct inno_hdmi_phy_config {

-- 
2.34.1