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From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date: Wed, 22 May 2024 13:50:59 +0300
Subject: [PATCH v2 07/14] drm/msm/hdmi: switch to
 pm_runtime_resume_and_get()
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Message-Id: <20240522-fd-hdmi-hpd-v2-7-c30bdb7c5c7e@linaro.org>
References: <20240522-fd-hdmi-hpd-v2-0-c30bdb7c5c7e@linaro.org>
In-Reply-To: <20240522-fd-hdmi-hpd-v2-0-c30bdb7c5c7e@linaro.org>
To: Rob Clark <robdclark@gmail.com>, 
 Abhinav Kumar <quic_abhinavk@quicinc.com>, 
 Dmitry Baryshkov <dmitry.baryshkov@linaro.org>, Sean Paul <sean@poorly.run>, 
 Marijn Suijten <marijn.suijten@somainline.org>, 
 David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>
Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, 
 freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org

The pm_runtime_get_sync() function is a bad choise for runtime power
management. Switch HDMI driver to pm_runtime_resume_and_get() and add
proper error handling, while we are at it.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/hdmi/hdmi_bridge.c |  2 +-
 drivers/gpu/drm/msm/hdmi/hdmi_hpd.c    | 12 ++++++++++--
 drivers/gpu/drm/msm/hdmi/hdmi_phy.c    |  6 +++++-
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index fb99328107dd..d1b35328b6e8 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -19,7 +19,7 @@ static void msm_hdmi_power_on(struct drm_bridge *bridge)
 	const struct hdmi_platform_config *config = hdmi->config;
 	int ret;
 
-	pm_runtime_get_sync(&hdmi->pdev->dev);
+	pm_runtime_resume_and_get(&hdmi->pdev->dev);
 
 	ret = regulator_bulk_enable(config->pwr_reg_cnt, hdmi->pwr_regs);
 	if (ret)
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
index 36266aa626dc..fc21ad3b01dc 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c
@@ -85,7 +85,12 @@ int msm_hdmi_hpd_enable(struct drm_bridge *bridge)
 	if (hdmi->hpd_gpiod)
 		gpiod_set_value_cansleep(hdmi->hpd_gpiod, 1);
 
-	pm_runtime_get_sync(dev);
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "runtime resume failed: %d\n", ret);
+		goto fail;
+	}
+
 	ret = clk_bulk_prepare_enable(config->hpd_clk_cnt, hdmi->hpd_clks);
 	if (ret)
 		goto fail;
@@ -178,7 +183,10 @@ static enum drm_connector_status detect_reg(struct hdmi *hdmi)
 	uint32_t hpd_int_status = 0;
 	int ret;
 
-	pm_runtime_get_sync(&hdmi->pdev->dev);
+	ret = pm_runtime_resume_and_get(&hdmi->pdev->dev);
+	if (ret)
+		goto out;
+
 	ret = clk_bulk_prepare_enable(config->hpd_clk_cnt, hdmi->hpd_clks);
 	if (ret)
 		goto out;
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_phy.c b/drivers/gpu/drm/msm/hdmi/hdmi_phy.c
index 88a3423b7f24..d5acae752300 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_phy.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_phy.c
@@ -58,7 +58,11 @@ int msm_hdmi_phy_resource_enable(struct hdmi_phy *phy)
 	struct device *dev = &phy->pdev->dev;
 	int i, ret = 0;
 
-	pm_runtime_get_sync(dev);
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "runtime resume failed: %d\n", ret);
+		return ret;
+	}
 
 	ret = regulator_bulk_enable(cfg->num_regs, phy->regs);
 	if (ret) {

-- 
2.39.2