openwrtv4/target/linux/layerscape/patches-4.9/807-gpu-support-layerscape.patch

From 177f92a14d8177124f37db0fafc11182e2dcdd62 Mon Sep 17 00:00:00 2001
From: Yangbo Lu <yangbo.lu@nxp.com>
Date: Wed, 17 Jan 2018 15:33:05 +0800
Subject: [PATCH 19/30] gpu: support layerscape

This is an integrated patch for layerscape dcu support.

Signed-off-by: Alison Wang <b18965@freescale.com>
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
---
 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
@@ -225,7 +225,6 @@ static int fsl_dcu_drm_pm_suspend(struct
 	if (!fsl_dev)
 		return 0;
 
-	disable_irq(fsl_dev->irq);
 	drm_kms_helper_poll_disable(fsl_dev->drm);
 
 	console_lock();
@@ -243,6 +242,8 @@ static int fsl_dcu_drm_pm_suspend(struct
 		return PTR_ERR(fsl_dev->state);
 	}
 
+	disable_irq(fsl_dev->irq);
+
 	clk_disable_unprepare(fsl_dev->clk);
 
 	return 0;
@@ -262,6 +263,12 @@ static int fsl_dcu_drm_pm_resume(struct
 		return ret;
 	}
 
+	ret = clk_prepare_enable(fsl_dev->pix_clk);
+	if (ret < 0) {
+		dev_err(dev, "failed to enable dcu pix clk\n");
+		return ret;
+	}
+
 	if (fsl_dev->tcon)
 		fsl_tcon_bypass_enable(fsl_dev->tcon);
 	fsl_dcu_drm_init_planes(fsl_dev->drm);
@@ -388,6 +395,12 @@ static int fsl_dcu_drm_probe(struct plat
 		goto disable_clk;
 	}
 
+	ret = clk_prepare_enable(fsl_dev->pix_clk);
+	if (ret < 0) {
+		dev_err(dev, "failed to enable dcu pix clk\n");
+		return ret;
+	}
+
 	fsl_dev->tcon = fsl_tcon_init(dev);
 
 	drm = drm_dev_alloc(driver, dev);