From 6262f547ca9f5ffd6e43494c9c3098687e2e390d Mon Sep 17 00:00:00 2001
From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Wed, 22 Dec 2021 19:01:32 +0000
Subject: drm/exynos/exynos_drm_fimd: Use platform_get_irq_byname() to get the
 interrupt
Git-commit: b342c1f335981ebc442127efe03524d2331a273c
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_byname(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_byname().

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_drm_fimd.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index c735e53939d8..7d5a483a54de 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -1133,7 +1133,6 @@ static int fimd_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct fimd_context *ctx;
 	struct device_node *i80_if_timings;
-	struct resource *res;
 	int ret;
 
 	if (!dev->of_node)
@@ -1206,15 +1205,11 @@ static int fimd_probe(struct platform_device *pdev)
 	if (IS_ERR(ctx->regs))
 		return PTR_ERR(ctx->regs);
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
-					   ctx->i80_if ? "lcd_sys" : "vsync");
-	if (!res) {
-		dev_err(dev, "irq request failed.\n");
-		return -ENXIO;
-	}
+	ret = platform_get_irq_byname(pdev, ctx->i80_if ? "lcd_sys" : "vsync");
+	if (ret < 0)
+		return ret;
 
-	ret = devm_request_irq(dev, res->start, fimd_irq_handler,
-							0, "drm_fimd", ctx);
+	ret = devm_request_irq(dev, ret, fimd_irq_handler, 0, "drm_fimd", ctx);
 	if (ret) {
 		dev_err(dev, "irq request failed.\n");
 		return ret;
-- 
2.38.1