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 --- 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 e0f190e43813..6d17d3cbd1df 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, @@ -356,7 +358,6 @@ int panfrost_gpu_init(struct panfrost_device *pfdev) return err; }

- panfrost_gpu_init_quirks(pfdev); panfrost_gpu_power_on(pfdev);

return 0;