Hi Vineet, On Thu, 2016-04-28 at 09:56 +-0530, Vineet Gupta wrote: +AFs-snip+AF0- +AD4- +AD4- +AD4- +AD4- diff --git a/arch/arc/boot/dts/axc001.dtsi b/arch/arc/boot/dts/axc001.dtsi +AD4- +AD4- index 420dcfd..ae6162d 100644 +AD4- +AD4- --- a/arch/arc/boot/dts/axc001.dtsi +AD4- +AD4- +-+-+- b/arch/arc/boot/dts/axc001.dtsi +AD4- +AD4- +AEAAQA- -95,6 +-95,24 +AEAAQA- +AD4- +AD4- +AKA- +ACM-size-cells +AD0- +ADw-1+AD4AOw- +AD4- +AD4- +AKA- ranges +AD0- +ADw-0x00000000 0x80000000 0x40000000+AD4AOw- +AD4- +AD4- +AKA- device+AF8-type +AD0- +ACI-memory+ACIAOw- +AD4- +AD4- - reg +AD0- +ADw-0x80000000 0x20000000+AD4AOw- /+ACo- 512MiB +ACo-/ +AD4- +AD4- +- reg +AD0- +ADw-0x80000000 0x1f000000+AD4AOw- /+ACo- 512 - 16 MiB +ACo-/ +AD4- Is 16MB fixed size or is this a function of display resolution / density etc. Indeed this value depends on screen resolution and bpp and double- or even tripple-buffering (once this becomes supported in the driver). So as of now the corner case would be 1920x1080, 16 bits per pixel which gives +AH4-4Mb. Now if we add support of triple-buffering we'll need +AH4-12Mb so I booked a little bit more - 16Mb. But now I recalled that we also support+AKA-r8g8b8 mode and in this case 3 bytes are used for color encoding, which effectively gives +AH4-6Mb for 1 FullHD frame. And for tripple-buffering we'll need +AD4- 18Mb, so probably we'll need to go for 24 or even 32 Mb. +AFs-snip+AF0- +AD4- +AD4- +- +AD4- +AD4- +- reserved-memory +AHs- +AD4- +AD4- +- +ACM-address-cells +AD0- +ADw-1+AD4AOw- +AD4- +AD4- +- +ACM-size-cells +AD0- +ADw-1+AD4AOw- +AD4- +AD4- +- ranges+ADs- +AD4- +AD4- +- /+ACo- +AD4- +AD4- +- +AKAAKg- Move frame buffer out of IOC aperture (0x8z-0xAz). +AD4- +AD4- +- +AKAAKg-/ +AD4- +AD4- +- frame+AF8-buffer: frame+AF8-buffer+AEA-bf000000 +AHs- +AD4- +AD4- +- compatible +AD0- +ACI-shared-dma-pool+ACIAOw- +AD4- +AD4- +- reg +AD0- +ADw-0xbf000000 0x1000000+AD4AOw- +AD4- Can this be made a bit more future safe. AXS103 has 1 GB of DDR while kernel +AD4- currently only uses 512M. Once we increase that, this will need fixing too. Better +AD4- to make this as far possible. Makes sense. Will move it to the very end of 1Gb. +AD4- Note that the IOC start alignment needs to follow +AD4- max(4k, size). What will be maximum size of frame buffer - 16M always +ACE- What do you mean by that? -Alexey-- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
