linux-kernel - [PATCH 8/8] ARM: S5PV210: example of CMA private area for FIMC device on Goni board

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Message-id: <1309851710-3828-9-git-send-email-m.szyprowski@samsung.com>
Date:	Tue, 05 Jul 2011 09:41:50 +0200
From:	Marek Szyprowski <m.szyprowski@...sung.com>
To:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-media@...r.kernel.org, linux-mm@...ck.org,
	linaro-mm-sig@...ts.linaro.org
Cc:	Michal Nazarewicz <mina86@...a86.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Ankita Garg <ankita@...ibm.com>,
	Daniel Walker <dwalker@...eaurora.org>,
	Mel Gorman <mel@....ul.ie>, Arnd Bergmann <arnd@...db.de>,
	Jesse Barker <jesse.barker@...aro.org>,
	Jonathan Corbet <corbet@....net>,
	Chunsang Jeong <chunsang.jeong@...aro.org>
Subject: [PATCH 8/8] ARM: S5PV210: example of CMA private area for FIMC device
 on Goni board

This patch is an example how device private CMA area can be activated.
It creates one CMA region and assigns it to the first s5p-fimc device on
Samsung Goni S5PC110 board.

Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
---
 arch/arm/mach-s5pv210/Kconfig     |    1 +
 arch/arm/mach-s5pv210/mach-goni.c |    8 ++++++++
 2 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-s5pv210/Kconfig b/arch/arm/mach-s5pv210/Kconfig
index 37b5a97..c09a92c 100644
--- a/arch/arm/mach-s5pv210/Kconfig
+++ b/arch/arm/mach-s5pv210/Kconfig
@@ -64,6 +64,7 @@ menu "S5PC110 Machines"
 config MACH_AQUILA
 	bool "Aquila"
 	select CPU_S5PV210
+	select CMA
 	select S3C_DEV_FB
 	select S5P_DEV_FIMC0
 	select S5P_DEV_FIMC1
diff --git a/arch/arm/mach-s5pv210/mach-goni.c b/arch/arm/mach-s5pv210/mach-goni.c
index 31d5aa7..d9e565d 100644
--- a/arch/arm/mach-s5pv210/mach-goni.c
+++ b/arch/arm/mach-s5pv210/mach-goni.c
@@ -26,6 +26,7 @@
 #include <linux/input.h>
 #include <linux/gpio.h>
 #include <linux/interrupt.h>
+#include <linux/dma-contiguous.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -886,6 +887,12 @@ static void __init goni_machine_init(void)
 	platform_add_devices(goni_devices, ARRAY_SIZE(goni_devices));
 }
 
+static void __init goni_reserve(void)
+{
+	/* Create private 16MiB contiguous memory area for s5p-fimc.0 device */
+	dma_declare_contiguous(&s5p_device_fimc0.dev, 16*SZ_1M, 0);
+}
+
 MACHINE_START(GONI, "GONI")
 	/* Maintainers: Kyungmin Park <kyungmin.park@...sung.com> */
 	.boot_params	= S5P_PA_SDRAM + 0x100,
@@ -893,4 +900,5 @@ MACHINE_START(GONI, "GONI")
 	.map_io		= goni_map_io,
 	.init_machine	= goni_machine_init,
 	.timer		= &s5p_timer,
+	.reserve	= goni_reserve,
 MACHINE_END
-- 
1.7.1.569.g6f426

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