[U-Boot] [PATCH V2 1/4] EXYNOS5: Change parent clock of FIMD to MPLL

Donghwa Lee dh09.lee at samsung.com
Mon Dec 17 02:12:08 CET 2012


On 2012년 12월 15일 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 at samsung.com>
>> Acked-by: Simon Glass <sjg at 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



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