Hi Sylwester, On 2 August 2013 16:28, Sylwester Nawrocki <s.nawro...@samsung.com> wrote: > Hi Vikas, > > On 08/02/2013 12:10 PM, Vikas Sajjan wrote: >> yeah, we could not allocate CMA region for FIMD, because the function >> dma_declare_contiguous() needs "dev" as the first argument and we have >> access to "dev" node only if it is NON-DT way of probing like the way >> it is done in arch/arm/mach-davinci/devices-da8xx.c >> But now, since the probing is through DT way, there is NO way ( Let me >> know if something is newly added ) to call dma_declare_contiguous() >> and reserve CMA region . > > See this patch series [1]. We have have been using this kind of bindings > for assigning physically contiguous memory regions to the Exynos > multimedia devices, instead of what's currently in mainline where same > physical addresses are repeated in dts for various boards without much > thought. And where custom device specific parsing code is required at > arch side. > > $ git grep mfc\-[lr] arch/arm/boot/dts > > arch/arm/boot/dts/exynos4210-origen.dts: samsung,mfc-r = <0x43000000 > 0x800000>; > arch/arm/boot/dts/exynos4210-origen.dts: samsung,mfc-l = <0x51000000 > 0x800000>; > arch/arm/boot/dts/exynos4210-smdkv310.dts: samsung,mfc-r = <0x43000000 > 0x800000>; > arch/arm/boot/dts/exynos4210-smdkv310.dts: samsung,mfc-l = <0x51000000 > 0x800000>; > arch/arm/boot/dts/exynos4412-origen.dts: samsung,mfc-r = <0x43000000 > 0x800000>; > arch/arm/boot/dts/exynos4412-origen.dts: samsung,mfc-l = <0x51000000 > 0x800000>; > arch/arm/boot/dts/exynos4412-smdk4412.dts: samsung,mfc-r = <0x43000000 > 0x800000>; > arch/arm/boot/dts/exynos4412-smdk4412.dts: samsung,mfc-l = <0x51000000 > 0x800000>; > arch/arm/boot/dts/exynos5250-arndale.dts: samsung,mfc-r = <0x43000000 > 0x800000>; > arch/arm/boot/dts/exynos5250-arndale.dts: samsung,mfc-l = <0x51000000 > 0x800000>; > arch/arm/boot/dts/exynos5250-smdk5250.dts: samsung,mfc-r = <0x43000000 > 0x800000>; > arch/arm/boot/dts/exynos5250-smdk5250.dts: samsung,mfc-l = <0x51000000 > 0x800000>; > > > [1] http://www.spinics.net/lists/arm-kernel/msg263130.html >
Thanks, its good that now we have a new way to reserve CMA region. > Regards, > Sylwester -- Thanks and Regards Vikas Sajjan -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
