On Wed, Feb 27, 2019 at 03:41:35PM +0000, Ayan Halder wrote: > Hi Neil, > > AFBC 1.0 does not support (ignoring common prefix AFBC_FORMAT_MOD_) > BLOCK_SIZE_32x8, BLOCK_SIZE_64x4, BLOCK_SIZE_32x8_64x4 > CBR, TILED, SC, DB and BCH modifiers. > > AFBC 1.2 does not support BLOCK_SIZE_64x4, BLOCK_SIZE_32x8_64x4, DB and BCH > modifiers.
Would be great to add that to kernel comments in drm_fourcc.h ... -Daniel > > Beyond that it's very hard to say. The AFBC version numbers refer to versions > of the specification, but aren't very useful for describing the actual > bitstream format. > To determine which modifiers _are_ supported, you will really need to get > technical documentation from the SoC vendor > > Regards, > Ayan Kumar Halder > > ________________________________ > From: Neil Armstrong <narmstr...@baylibre.com> > Sent: Tuesday, February 26, 2019 2:15 PM > To: Ayan Halder; Liviu Dudau > Cc: DRI Development > Subject: AFBC versions modifiers > > Hi Ayan, > > Could you help distinguish which are the AFBC modifiers for each version of > AFBC ? > > The Amlogic SoCs embeds an AFBC 1.0 compatible decoder, then the newer SoCs > embeds an AFBC 1.2 decoder, > I assume the modifiers before the patch "drm/fourcc: Add modifier > defininitions for AFBC 1.3" are > valid for AFBC 1.2, but what is the subset for 1.0 and 1.1 ? > > Thanks, > Neil > > -- > Neil Armstrong > Embedded Linux Software Engineer > BayLibre - At the Heart of Embedded Linux > www.baylibre.com<http://www.baylibre.com> > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
