From: Lucas Stach <l.stach@pengutronix.de>
Date: Fri, 17 Nov 2017 16:19:50 +0000 (+0100)
Subject: drm/etnaviv: remove switch_context member from etnaviv_gpu
X-Git-Tag: v4.19~1610^2~18^2~19
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4375ffffbf099f14815380a3d9e5784ffc55bf31;p=platform%2Fkernel%2Flinux-rpi3.git

drm/etnaviv: remove switch_context member from etnaviv_gpu

There is no need to store this in the gpu struct. MMU flushes are triggered
correctly in reaction to MMU maps and unmaps, independent of the current ctx.
Any required pipe switches can be infered from the current and the desired
GPU exec state.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
---

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
index 9e7098e..6ad8972 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c
@@ -294,6 +294,7 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event,
 	unsigned int waitlink_offset = buffer->user_size - 16;
 	u32 return_target, return_dwords;
 	u32 link_target, link_dwords;
+	bool switch_context = gpu->exec_state != cmdbuf->exec_state;
 
 	if (drm_debug & DRM_UT_DRIVER)
 		etnaviv_buffer_dump(gpu, buffer, 0, 0x50);
@@ -306,7 +307,7 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event,
 	 * need to append a mmu flush load state, followed by a new
 	 * link to this buffer - a total of four additional words.
 	 */
-	if (gpu->mmu->need_flush || gpu->switch_context) {
+	if (gpu->mmu->need_flush || switch_context) {
 		u32 target, extra_dwords;
 
 		/* link command */
@@ -321,7 +322,7 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event,
 		}
 
 		/* pipe switch commands */
-		if (gpu->switch_context)
+		if (switch_context)
 			extra_dwords += 4;
 
 		target = etnaviv_buffer_reserve(gpu, buffer, extra_dwords);
@@ -349,10 +350,9 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event,
 			gpu->mmu->need_flush = false;
 		}
 
-		if (gpu->switch_context) {
+		if (switch_context) {
 			etnaviv_cmd_select_pipe(gpu, buffer, cmdbuf->exec_state);
 			gpu->exec_state = cmdbuf->exec_state;
-			gpu->switch_context = false;
 		}
 
 		/* And the link to the submitted buffer */
@@ -421,4 +421,6 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event,
 
 	if (drm_debug & DRM_UT_DRIVER)
 		etnaviv_buffer_dump(gpu, buffer, 0, 0x50);
+
+	gpu->lastctx = cmdbuf->ctx;
 }
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index 3738383..6ce4b9d 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -1416,12 +1416,6 @@ int etnaviv_gpu_submit(struct etnaviv_gpu *gpu,
 	submit->fence = dma_fence_get(fence);
 	gpu->active_fence = submit->fence->seqno;
 
-	if (gpu->lastctx != cmdbuf->ctx) {
-		gpu->mmu->need_flush = true;
-		gpu->switch_context = true;
-		gpu->lastctx = cmdbuf->ctx;
-	}
-
 	if (cmdbuf->nr_pmrs) {
 		gpu->event[event[1]].sync_point = &sync_point_perfmon_sample_pre;
 		gpu->event[event[1]].cmdbuf = cmdbuf;
@@ -1662,7 +1656,7 @@ static int etnaviv_gpu_hw_resume(struct etnaviv_gpu *gpu)
 	etnaviv_gpu_update_clock(gpu);
 	etnaviv_gpu_hw_init(gpu);
 
-	gpu->switch_context = true;
+	gpu->lastctx = NULL;
 	gpu->exec_state = -1;
 
 	mutex_unlock(&gpu->lock);
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
index 4f10f14..15090bb 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
@@ -106,7 +106,6 @@ struct etnaviv_gpu {
 	struct mutex lock;
 	struct etnaviv_chip_identity identity;
 	struct etnaviv_file_private *lastctx;
-	bool switch_context;
 
 	/* 'ring'-buffer: */
 	struct etnaviv_cmdbuf *buffer;