On Fri, Aug 07, 2015 at 03:06:38PM +0200, Philipp Zabel wrote: > Am Freitag, den 07.08.2015, 14:42 +0200 schrieb Thierry Reding: > > On Fri, Jun 26, 2015 at 12:27:08PM +0200, Lucas Stach wrote: > > > From: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> > > > > > > > Can you be more specific here? What kind of bus format is this? > > The bus_format contains more information than just the bpc. In this > case, the SPWG default format for RGB666 via 3-pair LVDS specifies how > the 18 color bits are serialized in the 7 time slots for each pixel > clock. See > http://linuxtv.org/downloads/v4l-dvb-apis/subdev.html#v4l2-mbus-pixelcode-rgb-lvds > for details. > > > Why is it that .bpc = 6 doesn't work here? > > In this case a LVDS driver could indeed still decide itself that > bpc == 6 should be translated to MEDIA_BUS_FMT_RGB666_1X7X3_SPWG (and > not MEDIA_BUS_FMT_RGB666_1X18, or MEDIA_BUS_FMT_RGB666_1X24_CPADHI, for > example). But in the bpc == 8 case there are two different standard ways > to order the bits (SPWG/VESA vs JEIDA). > For consistency, I'd prefer to set bus_format to the correct value > everywhere. Now if we can put that into a commit message, that'd be perfect. Thierry
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