From 8c3c818c23a5bbce6ff180dd2ee04415241df77c Mon Sep 17 00:00:00 2001
From: Steven Price <steven.price@arm.com>
Date: Wed, 9 Sep 2020 13:29:57 +0100
Subject: [PATCH] drm/panfrost: Ensure GPU quirks are always initialised
The GPU 'CONFIG' registers used to work around hardware issues are
cleared on reset so need to be programmed every time the GPU is reset.
However panfrost_device_reset() failed to do this.
To avoid this in future instead move the call to
panfrost_gpu_init_quirks() to panfrost_gpu_power_on() so that the
regsiters are always programmed just before the cores are powered.
Fixes: f3ba91228e8e ("drm/panfrost: Add initial panfrost driver")
Signed-off-by: Steven Price <steven.price@arm.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200909122957.51667-1-steven.price@arm.com
---
drivers/gpu/drm/panfrost/panfrost_gpu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c
index eea049c640a6..c7c5da5a31d4 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gpu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c
@@ -305,6 +305,8 @@ void panfrost_gpu_power_on(struct panfrost_device *pfdev)
int ret;
u32 val;
+ panfrost_gpu_init_quirks(pfdev);
+
/* Just turn on everything for now */
gpu_write(pfdev, L2_PWRON_LO, pfdev->features.l2_present);
ret = readl_relaxed_poll_timeout(pfdev->iomem + L2_READY_LO,
@@ -357,7 +359,6 @@ int panfrost_gpu_init(struct panfrost_device *pfdev)
return err;
}
- panfrost_gpu_init_quirks(pfdev);
panfrost_gpu_power_on(pfdev);
return 0;