linux-kernel - [PATCH 4/4] drm/mediatek: dsi: Enable runtime PM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250407133138.22449-5-bincai.liu@mediatek.com>
Date: Mon, 7 Apr 2025 21:31:25 +0800
From: Bincai Liu <bincai.liu@...iatek.com>
To: Chun-Kuang Hu <chunkuang.hu@...nel.org>, Philipp Zabel
	<p.zabel@...gutronix.de>, 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>,
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Chunfeng Yun <chunfeng.yun@...iatek.com>,
	Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, Jitao Shi <jitao.shi@...iatek.com>
CC: <dri-devel@...ts.freedesktop.org>, <linux-mediatek@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-phy@...ts.infradead.org>,
	Bincai Liu <bincai.liu@...iatek.com>
Subject: [PATCH 4/4] drm/mediatek: dsi: Enable runtime PM

This power is new added in MT8196. So runtime PM is enable
to turn off dsi power to reduce power consumption.

Signed-off-by: Bincai Liu <bincai.liu@...iatek.com>
---
 drivers/gpu/drm/mediatek/mtk_dsi.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index b1467d6bed06..21cfba1f9b89 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -12,6 +12,7 @@
 #include <linux/of_platform.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
 #include <linux/reset.h>
 #include <linux/units.h>
 
@@ -715,6 +716,7 @@ static int mtk_dsi_poweron(struct mtk_dsi *dsi)
 	dsi->data_rate = DIV_ROUND_UP_ULL(dsi->vm.pixelclock * bit_per_pixel,
 					  dsi->lanes);
 
+	pm_runtime_get_sync(dsi->host.dev);
 	ret = clk_set_rate(dsi->hs_clk, dsi->data_rate);
 	if (ret < 0) {
 		dev_err(dev, "Failed to set data rate: %d\n", ret);
@@ -789,6 +791,7 @@ static void mtk_dsi_poweroff(struct mtk_dsi *dsi)
 	clk_disable_unprepare(dsi->digital_clk);
 
 	phy_power_off(dsi->phy);
+	pm_runtime_put_sync(dsi->host.dev);
 
 	dsi->lanes_ready = false;
 }
@@ -1272,6 +1275,7 @@ static int mtk_dsi_probe(struct platform_device *pdev)
 	dsi->bridge.funcs = &mtk_dsi_bridge_funcs;
 	dsi->bridge.of_node = dev->of_node;
 	dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
+	pm_runtime_enable(dev);
 
 	return 0;
 }
@@ -1282,6 +1286,7 @@ static void mtk_dsi_remove(struct platform_device *pdev)
 
 	mtk_output_dsi_disable(dsi);
 	mipi_dsi_host_unregister(&dsi->host);
+	pm_runtime_disable(&pdev->dev);
 }
 
 static const struct mtk_dsi_driver_data mt8173_dsi_driver_data = {
-- 
2.45.2