linux-kernel - [PATCH v9 1/7] drm/msm/dp: tie dp_display_irq

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Date:   Fri, 1 Dec 2023 15:19:43 -0800
From:   Kuogee Hsieh <quic_khsieh@...cinc.com>
To:     <dri-devel@...ts.freedesktop.org>, <robdclark@...il.com>,
        <sean@...rly.run>, <swboyd@...omium.org>, <dianders@...omium.org>,
        <vkoul@...nel.org>, <daniel@...ll.ch>, <airlied@...il.com>,
        <agross@...nel.org>, <dmitry.baryshkov@...aro.org>,
        <andersson@...nel.org>
CC:     Kuogee Hsieh <quic_khsieh@...cinc.com>,
        <quic_abhinavk@...cinc.com>, <quic_jesszhan@...cinc.com>,
        <quic_sbillaka@...cinc.com>, <marijn.suijten@...ainline.org>,
        <freedreno@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v9 1/7] drm/msm/dp: tie dp_display_irq_handler() with dp driver

Currently the dp_display_request_irq() is executed at
msm_dp_modeset_init() which ties irq registering to the DPU device's
life cycle, while depending on resources that are released as the DP
device is torn down. Move register DP driver irq handler to
dp_display_probe() to have dp_display_irq_handler() IRQ tied with DP
device. In addition, use platform_get_irq() to retrieve irq number
from platform device directly.

Changes in v5:
-- reworded commit text as review comments at change #4
-- tear down component if failed at dp_display_request_irq()

Changes in v4:
-- delete dp->irq check at dp_display_request_irq()

Changes in v3:
-- move calling dp_display_irq_handler() to probe

Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 32 +++++++++++++-------------------
 drivers/gpu/drm/msm/dp/dp_display.h |  1 -
 2 files changed, 13 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index e329e03..2110862 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1184,26 +1184,18 @@ static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
 	return ret;
 }
 
-int dp_display_request_irq(struct msm_dp *dp_display)
+static int dp_display_request_irq(struct dp_display_private *dp)
 {
 	int rc = 0;
-	struct dp_display_private *dp;
-
-	if (!dp_display) {
-		DRM_ERROR("invalid input\n");
-		return -EINVAL;
-	}
-
-	dp = container_of(dp_display, struct dp_display_private, dp_display);
+	struct platform_device *pdev = dp->dp_display.pdev;
 
-	dp->irq = irq_of_parse_and_map(dp->dp_display.pdev->dev.of_node, 0);
+	dp->irq = platform_get_irq(pdev, 0);
 	if (!dp->irq) {
 		DRM_ERROR("failed to get irq\n");
 		return -EINVAL;
 	}
 
-	rc = devm_request_irq(dp_display->drm_dev->dev, dp->irq,
-			dp_display_irq_handler,
+	rc = devm_request_irq(&pdev->dev, dp->irq, dp_display_irq_handler,
 			IRQF_TRIGGER_HIGH, "dp_display_isr", dp);
 	if (rc < 0) {
 		DRM_ERROR("failed to request IRQ%u: %d\n",
@@ -1278,13 +1270,21 @@ static int dp_display_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, &dp->dp_display);
 
+	rc = dp_display_request_irq(dp);
+	if (rc)
+		goto err;
+
 	rc = component_add(&pdev->dev, &dp_display_comp_ops);
 	if (rc) {
 		DRM_ERROR("component add failed, rc=%d\n", rc);
-		dp_display_deinit_sub_modules(dp);
+		goto err;
 	}
 
 	return rc;
+
+err:
+	dp_display_deinit_sub_modules(dp);
+	return rc;
 }
 
 static void dp_display_remove(struct platform_device *pdev)
@@ -1537,12 +1537,6 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
 
 	dp_priv = container_of(dp_display, struct dp_display_private, dp_display);
 
-	ret = dp_display_request_irq(dp_display);
-	if (ret) {
-		DRM_ERROR("request_irq failed, ret=%d\n", ret);
-		return ret;
-	}
-
 	ret = dp_display_get_next_bridge(dp_display);
 	if (ret)
 		return ret;
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index f66cdbc..15dbd2f 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -36,7 +36,6 @@ struct msm_dp {
 int dp_display_set_plugged_cb(struct msm_dp *dp_display,
 		hdmi_codec_plugged_cb fn, struct device *codec_dev);
 int dp_display_get_modes(struct msm_dp *dp_display);
-int dp_display_request_irq(struct msm_dp *dp_display);
 bool dp_display_check_video_test(struct msm_dp *dp_display);
 int dp_display_get_test_bpp(struct msm_dp *dp_display);
 void dp_display_signal_audio_start(struct msm_dp *dp_display);
-- 
2.7.4