linux-kernel - [PATCH v2] drm/msm/a6xx: request memory region

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Message-Id: <20240511-msm-adreno-memory-region-v2-1-9f33f42e7b99@gmail.com>
Date: Sat, 11 May 2024 15:56:21 -0400
From: Kiarash Hajian <kiarash8112hajian@...il.com>
To: Rob Clark <robdclark@...il.com>, 
 Abhinav Kumar <quic_abhinavk@...cinc.com>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Sean Paul <sean@...rly.run>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
 freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Kiarash Hajian <kiarash8112hajian@...il.com>
Subject: [PATCH v2] drm/msm/a6xx: request memory region

The driver's memory regions are currently just ioremap()ed, but not
reserved through a request. That's not a bug, but having the request is
a little more robust.

Implement the region-request through the corresponding managed
devres-function.

Signed-off-by: Kiarash Hajian <kiarash8112hajian@...il.com>
---
Changes in v2:
- update the subject prefix to "drm/msm/a6xx:", to match the majority of other changes to this file.
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index 8bea8ef26f77..aa83cb461a75 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -636,9 +636,9 @@ static void a6xx_gmu_rpmh_init(struct a6xx_gmu *gmu)
 
 err:
 	if (!IS_ERR_OR_NULL(pdcptr))
-		iounmap(pdcptr);
+		devm_iounmap(&pdev->dev,pdcptr);
 	if (!IS_ERR_OR_NULL(seqptr))
-		iounmap(seqptr);
+		devm_iounmap(&pdev->dev,seqptr);
 }
 
 /*
@@ -1503,7 +1503,7 @@ static void __iomem *a6xx_gmu_get_mmio(struct platform_device *pdev,
 		return ERR_PTR(-EINVAL);
 	}
 
-	ret = ioremap(res->start, resource_size(res));
+	ret = devm_ioremap_resource(&pdev->dev, res);
 	if (!ret) {
 		DRM_DEV_ERROR(&pdev->dev, "Unable to map the %s registers\n", name);
 		return ERR_PTR(-EINVAL);
@@ -1646,7 +1646,7 @@ int a6xx_gmu_wrapper_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
 	dev_pm_domain_detach(gmu->cxpd, false);
 
 err_mmio:
-	iounmap(gmu->mmio);
+	devm_iounmap(gmu->dev ,gmu->mmio);
 
 	/* Drop reference taken in of_find_device_by_node */
 	put_device(gmu->dev);
@@ -1825,9 +1825,9 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
 	dev_pm_domain_detach(gmu->cxpd, false);
 
 err_mmio:
-	iounmap(gmu->mmio);
+	devm_iounmap(gmu->dev ,gmu->mmio);
 	if (platform_get_resource_byname(pdev, IORESOURCE_MEM, "rscc"))
-		iounmap(gmu->rscc);
+		devm_iounmap(gmu->dev ,gmu->rscc);
 	free_irq(gmu->gmu_irq, gmu);
 	free_irq(gmu->hfi_irq, gmu);
 

---
base-commit: cf87f46fd34d6c19283d9625a7822f20d90b64a4
change-id: 20240511-msm-adreno-memory-region-2bcb1c958621

Best regards,
-- 
Kiarash Hajian <kiarash8112hajian@...il.com>