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From: Donghwa Lee <dh09.lee@samsung.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH V2 1/4] EXYNOS5: Change parent clock of FIMD to MPLL
Date: Mon, 17 Dec 2012 10:12:08 +0900	[thread overview]
Message-ID: <50CE7168.9060808@samsung.com> (raw)
In-Reply-To: <50CC0700.6040308@samsung.com>

On 2012? 12? 15? 14:13, Minkyu Kang wrote:
> Dear Donghwa,
>
> On 13/12/12 20:29, Ajay Kumar wrote:
>> With VPLL as source clock to FIMD,
>> Exynos DP Initializaton was failing sometimes with unstable clock.
>> Changing FIMD source to MPLL resolves this issue.
>>
>> Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
>> Acked-by: Simon Glass <sjg@chromium.org>
>> ---
>>   arch/arm/cpu/armv7/exynos/clock.c |    2 +-
>>   1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c
>> index fe61f88..bfcd5f7 100644
>> --- a/arch/arm/cpu/armv7/exynos/clock.c
>> +++ b/arch/arm/cpu/armv7/exynos/clock.c
>> @@ -603,7 +603,7 @@ void exynos5_set_lcd_clk(void)
>>   	 */
>>   	cfg = readl(&clk->src_disp1_0);
>>   	cfg &= ~(0xf);
>> -	cfg |= 0x8;
>> +	cfg |= 0x6;
> Please check it.
In order to use the configured refresh rate as closely as possible, it 
is more proper value(MPLL: 0x6) than
using VPLL as source clock.

Thank you,
Donghwa Lee

  reply	other threads:[~2012-12-17  1:12 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-12-13 11:29 [U-Boot] [PATCH V2 0/4] Add support for FIMD and DP on SMDK5250 Ajay Kumar
2012-12-13 11:29 ` [U-Boot] [PATCH V2 1/4] EXYNOS5: Change parent clock of FIMD to MPLL Ajay Kumar
2012-12-15  5:13   ` Minkyu Kang
2012-12-17  1:12     ` Donghwa Lee [this message]
2012-12-13 11:29 ` [U-Boot] [PATCH RESEND 2/4] video: Fix compilation dependency of exynos_dp and exynos_mipi on exynos_fb Ajay Kumar
2012-12-15  5:25   ` Minkyu Kang
2012-12-17  0:53     ` Donghwa Lee
2012-12-13 11:29 ` [U-Boot] [PATCH V2 3/4] video: Modify exynos_fimd driver to support LCD console Ajay Kumar
2012-12-14 22:38   ` Simon Glass
2012-12-13 11:29 ` [U-Boot] [PATCH V2 4/4] EXYNOS5: Add support for FIMD and DP Ajay Kumar
2012-12-15  5:22   ` Minkyu Kang

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