linux-kernel - [PATCH 2/2] dma-buf/sync_file: improve Kconfig description for Sync Files

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Date:	Tue, 31 May 2016 11:33:16 -0300
From:	Gustavo Padovan <gustavo@...ovan.org>
To:	Sumit Semwal <sumit.semwal@...aro.org>
Cc:	linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>,
	Dave Jones <davej@...emonkey.org.uk>
Subject: [PATCH 2/2] dma-buf/sync_file: improve Kconfig description for Sync Files

From: Gustavo Padovan <gustavo.padovan@...labora.co.uk>

We've got a complaint saying that the description was quite obtuse and
indeed it was. This patch tries to improve it.

Cc: Dave Jones <davej@...emonkey.org.uk>
Signed-off-by: Gustavo Padovan <gustavo.padovan@...labora.co.uk>
---
 drivers/dma-buf/Kconfig | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/dma-buf/Kconfig b/drivers/dma-buf/Kconfig
index 9824bc4..7e2d2c4 100644
--- a/drivers/dma-buf/Kconfig
+++ b/drivers/dma-buf/Kconfig
@@ -1,11 +1,20 @@
 menu "DMABUF options"
 
 config SYNC_FILE
-	bool "sync_file support for fences"
+	bool "Explicit Synchronization Framework"
 	default n
 	select ANON_INODES
 	select DMA_SHARED_BUFFER
 	---help---
-	  This option enables the fence framework synchronization to export
-	  sync_files to userspace that can represent one or more fences.
+	  The Sync File Framework adds explicit syncronization via
+	  userspace. It enables send/receive 'struct fence' objects to/from
+	  userspace via Sync File fds for synchronization between drivers via
+	  userspace components. It has been ported from Android.
+
+	  The first and main user for this is graphics in which a fence is
+	  associated with a buffer. When a job is submitted to the GPU a fence
+	  is attached to the buffer and is transfered via userspace, using Sync
+	  Files fds, to the DRM driver for example. More details at
+	  Documentation/sync_file.txt.
+
 endmenu
-- 
2.5.5