linux-kernel - RE: [PATCH 2/4] ARM: EXYNOS: PL330 MDMA1 fix for revision 0 of Exynos4210 SOC

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Date:	Fri, 09 Nov 2012 19:19:58 +0900
From:	Kukjin Kim <kgene.kim@...sung.com>
To:	'Bartlomiej Zolnierkiewicz' <b.zolnierkie@...sung.com>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, jassisinghbrar@...il.com,
	vinod.koul@...el.com, rob.herring@...xeda.com, dinguyen@...era.com,
	pawel.moll@....com, t.figa@...sung.com, kyungmin.park@...sung.com
Subject: RE: [PATCH 2/4] ARM: EXYNOS: PL330 MDMA1 fix for revision 0 of
 Exynos4210 SOC

Bartlomiej Zolnierkiewicz wrote:
> 
> Ah, okay.  Here is full simplified patch.
> 
> From: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
> Subject: [PATCH v2] ARM: EXYNOS: PL330 MDMA1 fix for revision 0 of
> Exynos4210 SOC
> 
> Commit 8214513 ("ARM: EXYNOS: fix address for EXYNOS4 MDMA1")
> changed EXYNOS specific setup of PL330 DMA engine to use 'non-secure'
> mdma1 address instead of 'secure' one (from 0x12840000 to 0x12850000)
> to fix issue with some Exynos4212 SOCs.  Unfortunately it brakes
> PL330 setup for revision 0 of Exynos4210 SOC (mdma1 device cannot
> be found at 'non-secure' address):
> 
> [    0.566245] dma-pl330 dma-pl330.2: PERIPH_ID 0x0, PCELL_ID 0x0 !
> [    0.566278] dma-pl330: probe of dma-pl330.2 failed with error -22
> 
> Fix it by using 'secure' mdma1 address on Exynos4210 revision 0 SOC.
> 
> Reviewed-by: Tomasz Figa <t.figa@...sung.com>
> Cc: Kukjin Kim <kgene.kim@...sung.com>
> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
> ---
>  arch/arm/mach-exynos/dma.c              |    3 +++
>  arch/arm/mach-exynos/include/mach/map.h |    1 +
>  2 files changed, 4 insertions(+)
> 
> Index: b/arch/arm/mach-exynos/dma.c
> ===================================================================
> --- a/arch/arm/mach-exynos/dma.c	2012-11-07 18:20:36.561743865 +0100
> +++ b/arch/arm/mach-exynos/dma.c	2012-11-08 10:48:23.445067606 +0100
> @@ -275,6 +275,9 @@ static int __init exynos_dma_init(void)
>  		exynos_pdma1_pdata.nr_valid_peri =
>  			ARRAY_SIZE(exynos4210_pdma1_peri);
>  		exynos_pdma1_pdata.peri_id = exynos4210_pdma1_peri;
> +
> +		if (samsung_rev() == EXYNOS4210_REV_0)
> +			exynos_mdma1_device.res.start = EXYNOS4_PA_S_MDMA1;
>  	} else if (soc_is_exynos4212() || soc_is_exynos4412()) {
>  		exynos_pdma0_pdata.nr_valid_peri =
>  			ARRAY_SIZE(exynos4212_pdma0_peri);
> Index: b/arch/arm/mach-exynos/include/mach/map.h
> ===================================================================
> --- a/arch/arm/mach-exynos/include/mach/map.h	2012-11-07
> 18:20:44.801743862 +0100
> +++ b/arch/arm/mach-exynos/include/mach/map.h	2012-11-08
> 10:48:40.597067605 +0100
> @@ -92,6 +92,7 @@
> 
>  #define EXYNOS4_PA_MDMA0		0x10810000
>  #define EXYNOS4_PA_MDMA1		0x12850000
> +#define EXYNOS4_PA_S_MDMA1		0x12840000
>  #define EXYNOS4_PA_PDMA0		0x12680000
>  #define EXYNOS4_PA_PDMA1		0x12690000
>  #define EXYNOS5_PA_MDMA0		0x10800000

Looks good to me, and I think, this can be handled separate from this
series.

Vinod, if you're ok, let me pick this up into Samsung tree.

Thanks.

Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@...sung.com>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.

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