linux-kernel - [PATCH 4/8] drm/arm/malidp: Split malidp_se_irq

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Date:   Mon, 26 Mar 2018 18:03:16 +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 4/8] drm/arm/malidp: Split malidp_se_irq_init

Extract the hardware initialisation part from malidp_se_irq_init() into the
malidp_se_irq_hw_init() which will be later invoked from
malidpxxx_enable_memwrite() when it needs to re-enable the interrupts.

Signed-off-by: Ayan Kumar Halder <ayan.halder@....com>
Change-Id: Ibb26e86b38141993539307705695e3f6a9e32caa
---
 drivers/gpu/drm/arm/malidp_hw.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c
index 3e73370..f5633bc 100644
--- a/drivers/gpu/drm/arm/malidp_hw.c
+++ b/drivers/gpu/drm/arm/malidp_hw.c
@@ -163,6 +163,7 @@ static const u16 dp500_se_scaling_coeffs[][SE_N_SCALING_COEFFS] = {
 };
 
 #define MALIDP_DE_DEFAULT_PREFETCH_START	5
+static void malidp_se_irq_hw_init(struct malidp_hw_device *hwdev);
 
 static int malidp500_query_hw(struct malidp_hw_device *hwdev)
 {
@@ -952,6 +953,16 @@ static irqreturn_t malidp_se_irq(int irq, void *arg)
 	return IRQ_HANDLED;
 }
 
+static void malidp_se_irq_hw_init(struct malidp_hw_device *hwdev)
+{
+	/* ensure interrupts are disabled */
+	malidp_hw_disable_irq(hwdev, MALIDP_SE_BLOCK, 0xffffffff);
+	malidp_hw_clear_irq(hwdev, MALIDP_SE_BLOCK, 0xffffffff);
+
+	malidp_hw_enable_irq(hwdev, MALIDP_SE_BLOCK,
+			     hwdev->hw->map.se_irq_map.irq_mask);
+}
+
 static irqreturn_t malidp_se_irq_thread_handler(int irq, void *arg)
 {
 	return IRQ_HANDLED;
@@ -975,8 +986,7 @@ int malidp_se_irq_init(struct drm_device *drm, int irq)
 		return ret;
 	}
 
-	malidp_hw_enable_irq(hwdev, MALIDP_SE_BLOCK,
-			     hwdev->hw->map.se_irq_map.irq_mask);
+	malidp_se_irq_hw_init(hwdev);
 
 	return 0;
 }
-- 
2.7.4