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From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
To: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>,
	Tomasz Figa <tfiga@chromium.org>,
	linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
	Sergey Senozhatsky <senozhatsky@chromium.org>
Subject: [PATCHv5 08/13] videobuf2: do not sync caches when we are allowed not to
Date: Fri, 24 Apr 2020 18:29:15 +0900	[thread overview]
Message-ID: <20200424092920.4801-9-sergey.senozhatsky@gmail.com> (raw)
In-Reply-To: <20200424092920.4801-1-sergey.senozhatsky@gmail.com>

From: Sergey Senozhatsky <senozhatsky@chromium.org>

Skip ->prepare() or/and ->finish() cache synchronisation if
user-space requested us to do so (or when queue dma direction
permits us to skip cache syncs).

Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
---
 drivers/media/common/videobuf2/videobuf2-core.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
index 0be31a11c913..5409e15b6af4 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -304,8 +304,11 @@ static void __vb2_buf_mem_prepare(struct vb2_buffer *vb)
 {
 	unsigned int plane;
 
-	for (plane = 0; plane < vb->num_planes; ++plane)
-		call_void_memop(vb, prepare, vb->planes[plane].mem_priv);
+	if (vb->need_cache_sync_on_prepare) {
+		for (plane = 0; plane < vb->num_planes; ++plane)
+			call_void_memop(vb, prepare,
+					vb->planes[plane].mem_priv);
+	}
 	vb->synced = 1;
 }
 
@@ -317,8 +320,11 @@ static void __vb2_buf_mem_finish(struct vb2_buffer *vb)
 {
 	unsigned int plane;
 
-	for (plane = 0; plane < vb->num_planes; ++plane)
-		call_void_memop(vb, finish, vb->planes[plane].mem_priv);
+	if (vb->need_cache_sync_on_finish) {
+		for (plane = 0; plane < vb->num_planes; ++plane)
+			call_void_memop(vb, finish,
+					vb->planes[plane].mem_priv);
+	}
 	vb->synced = 0;
 }
 
-- 
2.26.2


  parent reply	other threads:[~2020-04-24  9:31 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-24  9:29 [PATCHv5 00/13] Implement V4L2_BUF_FLAG_NO_CACHE_* flags Sergey Senozhatsky
2020-04-24  9:29 ` [PATCHv5 01/13] videobuf2: use explicit unsigned int in vb2_queue Sergey Senozhatsky
2020-04-24  9:29 ` [PATCHv5 02/13] videobuf2: add cache management members Sergey Senozhatsky
2020-04-24  9:29 ` [PATCHv5 03/13] videobuf2: handle V4L2 buffer cache flags Sergey Senozhatsky
2020-04-24  9:29 ` [PATCHv5 04/13] videobuf2: add V4L2_FLAG_MEMORY_NON_CONSISTENT flag Sergey Senozhatsky
2020-04-24  9:29 ` [PATCHv5 05/13] videobuf2: add queue memory consistency parameter Sergey Senozhatsky
2020-04-24  9:29 ` [PATCHv5 06/13] videobuf2: handle V4L2_FLAG_MEMORY_NON_CONSISTENT flag Sergey Senozhatsky
2020-04-24  9:29 ` [PATCHv5 07/13] videobuf2: factor out planes prepare/finish functions Sergey Senozhatsky
2020-04-24  9:29 ` Sergey Senozhatsky [this message]
2020-04-24  9:29 ` [PATCHv5 09/13] videobuf2: check ->synced flag in prepare() and finish() Sergey Senozhatsky
2020-04-24  9:29 ` [PATCHv5 10/13] videobuf2: add begin/end cpu_access callbacks to dma-contig Sergey Senozhatsky
2020-04-24  9:29 ` [PATCHv5 11/13] videobuf2: add begin/end cpu_access callbacks to dma-sg Sergey Senozhatsky
2020-04-24  9:29 ` [PATCHv5 12/13] videobuf2: don't test db_attach in dma-contig prepare and finish Sergey Senozhatsky
2020-04-24  9:29 ` [PATCHv5 13/13] media: vivid: add cache_hints module param Sergey Senozhatsky
2020-04-28 14:47 ` [PATCHv5 00/13] Implement V4L2_BUF_FLAG_NO_CACHE_* flags Hans Verkuil
2020-05-14 15:36   ` Sergey Senozhatsky

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