On Fri, Mar 19, 2021 at 10:44:56AM +0100, Neil Armstrong wrote: > On 18/03/2021 19:31, Jernej Škrabec wrote: > > Dne sreda, 17. marec 2021 ob 17:08:07 CET je Neil Armstrong napisal(a): > >> On 17/03/2021 16:43, Maxime Ripard wrote: > >>> The atomic_get_output_bus_fmts bridge callback is there to list the > >>> available formats for output by decreasing order of preference. > >>> > >>> On HDMI controllers, we have a fairly static list that will depend on > >>> what the HDMI sink is capable of and the BPC our controller can output. > >>> > >>> The dw-hdmi driver already has that code done in a fairly generic > >>> manner, so let's turn that code into an helper for all the HDMI > >>> controllers to reuse. > >> > >> This code was based on the capabilities of the DW-HDMI IP, copying it as-is > >> doesn't make much sense, we should be able to filter out formats the HDMI IP > >> doesn't support. > > > > HDMI standard has pretty strict requirements which formats should be > > supported, so cores should have very similar capabilities. > > Yes for output formats (we still may need to filter out 420, 422 for example), > > No for input formats, since it depends entirely on the capability of the transceiver > in terms of format conversion. Yeah, of course, that's why I only moved the output part to a generic helper :) We indeed might need to provide additional filtering to the output though Maxime
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