From: Sharat Masetty Date: Fri, 14 Sep 2018 08:38:55 +0000 (+0530) Subject: drm/msm/a5xx: Skip hardware preemption init if no preemption X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=fc6510ac4900db98851cabfd44a4a510b2d22db3;p=openwrt%2Fstaging%2Fblogic.git drm/msm/a5xx: Skip hardware preemption init if no preemption In the case where preemption is not enabled, this patch simply skips preemption related initialization in hardware init sequence. Signed-off-by: Sharat Masetty Reviewed-by: Jordan Crouse Signed-off-by: Rob Clark --- diff --git a/drivers/gpu/drm/msm/adreno/a5xx_preempt.c b/drivers/gpu/drm/msm/adreno/a5xx_preempt.c index 970c7963ae29..6a3c560ba5c3 100644 --- a/drivers/gpu/drm/msm/adreno/a5xx_preempt.c +++ b/drivers/gpu/drm/msm/adreno/a5xx_preempt.c @@ -208,6 +208,13 @@ void a5xx_preempt_hw_init(struct msm_gpu *gpu) struct a5xx_gpu *a5xx_gpu = to_a5xx_gpu(adreno_gpu); int i; + /* Always come up on rb 0 */ + a5xx_gpu->cur_ring = gpu->rb[0]; + + /* No preemption if we only have one ring */ + if (gpu->nr_rings == 1) + return; + for (i = 0; i < gpu->nr_rings; i++) { a5xx_gpu->preempt[i]->wptr = 0; a5xx_gpu->preempt[i]->rptr = 0; @@ -220,9 +227,6 @@ void a5xx_preempt_hw_init(struct msm_gpu *gpu) /* Reset the preemption state */ set_preempt_state(a5xx_gpu, PREEMPT_NONE); - - /* Always come up on rb 0 */ - a5xx_gpu->cur_ring = gpu->rb[0]; } static int preempt_init_ring(struct a5xx_gpu *a5xx_gpu,