[PATCH 2/4] drm/lima: power down ip blocks when pmu exit

[Qiang Yu <yuq825@xxxxxxxxx>]

Prepare resume/suspend PM.

Tested-by: Bhushan Shah <bshah@xxxxxxx>
Signed-off-by: Qiang Yu <yuq825@xxxxxxxxx>
---
 drivers/gpu/drm/lima/lima_device.h |  2 ++
 drivers/gpu/drm/lima/lima_pmu.c    | 43 ++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+)

diff --git a/drivers/gpu/drm/lima/lima_device.h b/drivers/gpu/drm/lima/lima_device.h
index 06fd9636dd72..1a5032b08883 100644
--- a/drivers/gpu/drm/lima/lima_device.h
+++ b/drivers/gpu/drm/lima/lima_device.h
@@ -64,6 +64,8 @@ struct lima_ip {
 		bool async_reset;
 		/* l2 cache */
 		spinlock_t lock;
+		/* pmu */
+		u32 mask;
 	} data;
 };
 
diff --git a/drivers/gpu/drm/lima/lima_pmu.c b/drivers/gpu/drm/lima/lima_pmu.c
index 571f6d661581..7f26bf384e15 100644
--- a/drivers/gpu/drm/lima/lima_pmu.c
+++ b/drivers/gpu/drm/lima/lima_pmu.c
@@ -29,6 +29,40 @@ static int lima_pmu_wait_cmd(struct lima_ip *ip)
 	return 0;
 }
 
+static u32 lima_pmu_get_ip_mask(struct lima_ip *ip)
+{
+	struct lima_device *dev = ip->dev;
+	u32 ret = 0;
+	int i;
+
+	ret |= LIMA_PMU_POWER_GP0_MASK;
+
+	if (dev->id == lima_gpu_mali400) {
+		ret |= LIMA_PMU_POWER_L2_MASK;
+		for (i = 0; i < 4; i++) {
+			if (dev->ip[lima_ip_pp0 + i].present)
+				ret |= LIMA_PMU_POWER_PP_MASK(i);
+		}
+	} else {
+		if (dev->ip[lima_ip_pp0].present)
+			ret |= LIMA450_PMU_POWER_PP0_MASK;
+		for (i = lima_ip_pp1; i <= lima_ip_pp3; i++) {
+			if (dev->ip[i].present) {
+				ret |= LIMA450_PMU_POWER_PP13_MASK;
+				break;
+			}
+		}
+		for (i = lima_ip_pp4; i <= lima_ip_pp7; i++) {
+			if (dev->ip[i].present) {
+				ret |= LIMA450_PMU_POWER_PP47_MASK;
+				break;
+			}
+		}
+	}
+
+	return ret;
+}
+
 int lima_pmu_init(struct lima_ip *ip)
 {
 	int err;
@@ -56,5 +90,14 @@ int lima_pmu_init(struct lima_ip *ip)
 
 void lima_pmu_fini(struct lima_ip *ip)
 {
+	u32 stat;
 
+	if (!ip->data.mask)
+		ip->data.mask = lima_pmu_get_ip_mask(ip);
+
+	stat = ~pmu_read(LIMA_PMU_STATUS) & ip->data.mask;
+	if (stat) {
+		pmu_write(LIMA_PMU_POWER_DOWN, stat);
+		lima_pmu_wait_cmd(ip);
+	}
 }
-- 
2.17.1

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