drm/exynos: mixer: Use platform_get_irq() to get the interrupt

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>

diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 41c54f1f60bc0f8fed1240ce725aa3a3622b4d85..e5204be86093273de2f46ab049efa36f0aef8f88 100644 (file)
--- 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;
 }