From c67547a00130aef13b13b3a258e86eff98afa7a4 Mon Sep 17 00:00:00 2001
From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Wed, 22 Dec 2021 19:01:31 +0000
Subject: drm/exynos: mixer: Use platform_get_irq() to get the interrupt
Git-commit: be52abd4d2b7ea343373cc116a99699a3e3c5573
Patch-mainline: v5.17-rc7
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypassed the hierarchical setup and messed up the
irq chaining.

In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq().

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/exynos/exynos_mixer.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 41c54f1f60bc..e5204be86093 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -809,19 +809,17 @@ static int mixer_resources_init(struct mixer_context *mixer_ctx)
 		return -ENXIO;
 	}
 
-	res = platform_get_resource(mixer_ctx->pdev, IORESOURCE_IRQ, 0);
-	if (res == NULL) {
-		dev_err(dev, "get interrupt resource failed.\n");
-		return -ENXIO;
-	}
+	ret = platform_get_irq(mixer_ctx->pdev, 0);
+	if (ret < 0)
+		return ret;
+	mixer_ctx->irq = ret;
 
-	ret = devm_request_irq(dev, res->start, mixer_irq_handler,
-						0, "drm_mixer", mixer_ctx);
+	ret = devm_request_irq(dev, mixer_ctx->irq, mixer_irq_handler,
+			       0, "drm_mixer", mixer_ctx);
 	if (ret) {
 		dev_err(dev, "request interrupt failed.\n");
 		return ret;
 	}
-	mixer_ctx->irq = res->start;
 
 	return 0;
 }
-- 
2.38.1