linux-kernel - [PATCH 09/25] drm: kirin: Move request irq handle in ade hw ctx alloc

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Message-Id: <1556061656-1733-10-git-send-email-john.stultz@linaro.org>
Date:   Tue, 23 Apr 2019 16:20:40 -0700
From:   John Stultz <john.stultz@...aro.org>
To:     lkml <linux-kernel@...r.kernel.org>
Cc:     Xu YiPing <xuyiping@...ilicon.com>,
        Xinliang Liu <z.liuxinliang@...ilicon.com>,
        Rongrong Zou <zourongrong@...il.com>,
        Xinwei Kong <kong.kongxinwei@...ilicon.com>,
        Chen Feng <puck.chen@...ilicon.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        John Stultz <john.stultz@...aro.org>
Subject: [PATCH 09/25] drm: kirin: Move request irq handle in ade hw ctx alloc

From: Xu YiPing <xuyiping@...ilicon.com>

As part of refactoring the kirin driver to better support
different hardware revisions, this patch modifies the
initialization routines so the devm_request_irq() function
is called as part of the allocation function.

This will be needed in the future when we will have different
allocation functions to allocate hardware specific hw_ctx
structures, which will setup the vblank irq differently.

Cc: Xinliang Liu <z.liuxinliang@...ilicon.com>
Cc: Rongrong Zou <zourongrong@...il.com>
Cc: Xinwei Kong <kong.kongxinwei@...ilicon.com>
Cc: Chen Feng <puck.chen@...ilicon.com>
Cc: David Airlie <airlied@...ux.ie>
Cc: Daniel Vetter <daniel@...ll.ch>
Cc: dri-devel <dri-devel@...ts.freedesktop.org>
Signed-off-by: Xu YiPing <xuyiping@...ilicon.com>
[jstultz: reworded commit message]
Signed-off-by: John Stultz <john.stultz@...aro.org>
---
 drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c | 29 +++++++++++++++----------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
index 0aa716e..94dcad0 100644
--- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
+++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
@@ -54,6 +54,8 @@ struct ade_hw_ctx {
 	struct reset_control *reset;
 	bool power_on;
 	int irq;
+
+	struct drm_crtc *crtc;
 };
 
 struct kirin_crtc {
@@ -358,9 +360,9 @@ static void drm_underflow_wq(struct work_struct *work)
 
 static irqreturn_t ade_irq_handler(int irq, void *data)
 {
-	struct kirin_crtc *kcrtc = data;
-	struct ade_hw_ctx *ctx = kcrtc->hw_ctx;
-	struct drm_crtc *crtc = &kcrtc->base;
+	struct ade_hw_ctx *ctx = data;
+	struct drm_crtc *crtc = ctx->crtc;
+	struct kirin_crtc *kcrtc = to_kirin_crtc(crtc);
 	void __iomem *base = ctx->base;
 	u32 status;
 
@@ -951,12 +953,14 @@ static int ade_plane_init(struct drm_device *dev, struct kirin_plane *kplane,
 	return 0;
 }
 
-static void *ade_hw_ctx_alloc(struct platform_device *pdev)
+static void *ade_hw_ctx_alloc(struct platform_device *pdev,
+							  struct drm_crtc *crtc)
 {
 	struct resource *res;
 	struct device *dev = &pdev->dev;
 	struct device_node *np = pdev->dev.of_node;
 	struct ade_hw_ctx *ctx = NULL;
+	int ret;
 
 	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
 	if (!ctx) {
@@ -1006,6 +1010,14 @@ static void *ade_hw_ctx_alloc(struct platform_device *pdev)
 		return ERR_PTR(-ENODEV);
 	}
 
+	/* vblank irq init */
+	ret = devm_request_irq(dev, ctx->irq, ade_irq_handler,
+			       IRQF_SHARED, dev->driver->name, ctx);
+	if (ret)
+		return ERR_PTR(-EIO);
+
+	ctx->crtc = crtc;
+
 	return ctx;
 }
 
@@ -1027,7 +1039,7 @@ static int ade_drm_init(struct platform_device *pdev)
 	}
 	platform_set_drvdata(pdev, ade);
 
-	ctx = ade_hw_ctx_alloc(pdev);
+	ctx = ade_hw_ctx_alloc(pdev, &ade->crtc.base);
 	if (IS_ERR(ctx)) {
 		DRM_ERROR("failed to initialize kirin_priv hw ctx\n");
 		return -EINVAL;
@@ -1059,15 +1071,8 @@ static int ade_drm_init(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	/* vblank irq init */
-	ret = devm_request_irq(dev->dev, ctx->irq, ade_irq_handler,
-			       IRQF_SHARED, dev->driver->name, kcrtc);
-
 	INIT_WORK(&kcrtc->drm_device_wq, drm_underflow_wq);
 
-	if (ret)
-		return ret;
-
 	return 0;
 }
 
-- 
2.7.4