From: Lucas Stach l.stach@pengutronix.de
commit 8f3eea9d01d7b0f95b0fe04187c0059019ada85b upstream.
The MMU state may be kept across a runtime suspend/resume cycle, as we avoid a full hardware reset to keep the latency of the runtime PM small.
Don't pretend that the MMU state is lost in driver state. The MMU context is pushed out when new HW jobs with a different context are coming in. The only exception to this is when the GPU is unbound, in which case we need to make sure to also free the last active context.
Cc: stable@vger.kernel.org # 5.4 Reported-by: Michael Walle michael@walle.cc Signed-off-by: Lucas Stach l.stach@pengutronix.de Tested-by: Michael Walle michael@walle.cc Tested-by: Marek Vasut marex@denx.de Reviewed-by: Christian Gmeiner christian.gmeiner@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -1578,9 +1578,6 @@ static int etnaviv_gpu_hw_suspend(struct */ etnaviv_gpu_wait_idle(gpu, 100);
- etnaviv_iommu_context_put(gpu->mmu_context); - gpu->mmu_context = NULL; - gpu->fe_running = false; }
@@ -1729,6 +1726,9 @@ static void etnaviv_gpu_unbind(struct de etnaviv_gpu_hw_suspend(gpu); #endif
+ if (gpu->mmu_context) + etnaviv_iommu_context_put(gpu->mmu_context); + if (gpu->initialized) { etnaviv_cmdbuf_free(&gpu->buffer); etnaviv_iommu_global_fini(gpu);