linux-kernel - [PATCH 3/8] drm/arm/malidp: Split malidp_de_irq

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Date:   Mon, 26 Mar 2018 18:03:15 +0100
From:   Ayan Kumar Halder <ayan.halder@....com>
To:     ayan.halder@....com, liviu.dudau@....com, brian.starkey@....com,
        malidp@...s.arm.com, airlied@...ux.ie,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     nd@....com
Subject: [PATCH 3/8] drm/arm/malidp: Split malidp_de_irq_init

Extract the hardware initialisation part from malidp_de_irq_init() into the
malidp_de_irq_hw_init() which will be later invoked from runtime_pm_resume
function when it needs to re-enable the interrupts.

Change-Id: If8bdb0e246653cb7d7b7d6d63919c45b01350c10
Signed-off-by: Ayan Kumar Halder <ayan.halder@....com>
---
 drivers/gpu/drm/arm/malidp_hw.c | 25 ++++++++++++++++++-------
 drivers/gpu/drm/arm/malidp_hw.h |  1 +
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c
index 8fb02f3..3e73370 100644
--- a/drivers/gpu/drm/arm/malidp_hw.c
+++ b/drivers/gpu/drm/arm/malidp_hw.c
@@ -869,6 +869,23 @@ static irqreturn_t malidp_de_irq_thread_handler(int irq, void *arg)
 	return IRQ_HANDLED;
 }
 
+void malidp_de_irq_hw_init(struct malidp_hw_device *hwdev)
+{
+	/* ensure interrupts are disabled */
+	malidp_hw_disable_irq(hwdev, MALIDP_DE_BLOCK, 0xffffffff);
+	malidp_hw_clear_irq(hwdev, MALIDP_DE_BLOCK, 0xffffffff);
+	malidp_hw_disable_irq(hwdev, MALIDP_DC_BLOCK, 0xffffffff);
+	malidp_hw_clear_irq(hwdev, MALIDP_DC_BLOCK, 0xffffffff);
+
+	/* first enable the DC block IRQs */
+	malidp_hw_enable_irq(hwdev, MALIDP_DC_BLOCK,
+			     hwdev->hw->map.dc_irq_map.irq_mask);
+
+	/* now enable the DE block IRQs */
+	malidp_hw_enable_irq(hwdev, MALIDP_DE_BLOCK,
+			     hwdev->hw->map.de_irq_map.irq_mask);
+}
+
 int malidp_de_irq_init(struct drm_device *drm, int irq)
 {
 	struct malidp_drm *malidp = drm->dev_private;
@@ -889,13 +906,7 @@ int malidp_de_irq_init(struct drm_device *drm, int irq)
 		return ret;
 	}
 
-	/* first enable the DC block IRQs */
-	malidp_hw_enable_irq(hwdev, MALIDP_DC_BLOCK,
-			     hwdev->hw->map.dc_irq_map.irq_mask);
-
-	/* now enable the DE block IRQs */
-	malidp_hw_enable_irq(hwdev, MALIDP_DE_BLOCK,
-			     hwdev->hw->map.de_irq_map.irq_mask);
+	malidp_de_irq_hw_init(hwdev);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/arm/malidp_hw.h b/drivers/gpu/drm/arm/malidp_hw.h
index 6607aba..3b049d0 100644
--- a/drivers/gpu/drm/arm/malidp_hw.h
+++ b/drivers/gpu/drm/arm/malidp_hw.h
@@ -297,6 +297,7 @@ static inline void malidp_hw_enable_irq(struct malidp_hw_device *hwdev,
 }
 
 int malidp_de_irq_init(struct drm_device *drm, int irq);
+void malidp_de_irq_hw_init(struct malidp_hw_device *hwdev);
 void malidp_de_irq_fini(struct malidp_hw_device *hwdev);
 int malidp_se_irq_init(struct drm_device *drm, int irq);
 void malidp_se_irq_fini(struct malidp_hw_device *hwdev);
-- 
2.7.4