drm/lima: power down ip blocks when pmu exit

Prepare resume/suspend PM.

v2:
Fix lima_pmu_wait_cmd timeout when mali400 case.

Tested-by: Bhushan Shah <bshah@kde.org>
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200421133551.31481-7-yuq825@gmail.com

diff --git a/drivers/gpu/drm/lima/lima_device.h b/drivers/gpu/drm/lima/lima_device.h
index 99b1fb1..9cd2718 100644 (file)
--- 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 571f6d6..d476569 100644 (file)
--- a/drivers/gpu/drm/lima/lima_pmu.c
+++ b/drivers/gpu/drm/lima/lima_pmu.c
@@ -21,7 +21,7 @@ static int lima_pmu_wait_cmd(struct lima_ip *ip)
                                 v, v & LIMA_PMU_INT_CMD_MASK,
                                 100, 100000);
        if (err) {
-               dev_err(dev->dev, "timeout wait pmd cmd\n");
+               dev_err(dev->dev, "timeout wait pmu cmd\n");
                return err;
        }
 
@@ -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 +90,22 @@ 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);
+
+               /* Don't wait for interrupt on Mali400 if all domains are
+                * powered off because the HW won't generate an interrupt
+                * in this case.
+                */
+               if (ip->dev->id == lima_gpu_mali400)
+                       pmu_write(LIMA_PMU_INT_CLEAR, LIMA_PMU_INT_CMD_MASK);
+               else
+                       lima_pmu_wait_cmd(ip);
+       }
 }