Hi Dmitry Baryshkov, > -----Original Message----- > From: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> > Sent: 05 December 2024 11:43 > Subject: Re: [PATCH] drm/bridge: ite-it6263: Support VESA input format > > On Thu, 5 Dec 2024 at 11:01, Liu Ying <victor.liu@xxxxxxx> wrote: > > > > On 12/04/2024, Biju Das wrote: > > > Hi Liu Ying, > > > > Hi Biju, > > > > > > > >> -----Original Message----- > > >> From: Liu Ying <victor.liu@xxxxxxx> > > >> Sent: 04 December 2024 03:43 > > >> Subject: Re: [PATCH] drm/bridge: ite-it6263: Support VESA input > > >> format > > >> > > >> On 12/04/2024, Dmitry Baryshkov wrote: > > >>> On Tue, Dec 03, 2024 at 06:21:29PM +0100, tomm.merciai@xxxxxxxxx wrote: > > >>>> From: Tommaso Merciai <tommaso.merciai.xr@xxxxxxxxxxxxxx> > > >>>> > > >>>> Introduce it6263_is_input_bus_fmt_valid() and refactor the > > >>>> it6263_bridge_atomic_get_input_bus_fmts() function to support > > >>>> VESA format by selecting the LVDS input format based on the LVDS > > >>>> data mapping and thereby support both JEIDA and VESA input formats. > > >>> > > >>> For the patch itself, > > >>> > > >>> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> > > >>> > > >>> A more generic question: is the bridge limited to 4 lanes or does > > >>> it support 3-lane or 5-lane configurations? > > >> > > >> According to ite,it6263.yaml, the bridge supports all the data > > >> mappings(jeida-{18,24,30} and vesa- > > >> {24,30}) listed in lvds-data-mapping.yaml. lvds-data-mapping.yaml > > >> specifies the data lanes(3/4/5) used by each of the data mappings. So, the bridge supports 3, 4 > or 5 data lanes. > > > > > > In Renesas SMARC RZ/G3E LVDS add on board, only 4 LVDS Rx lanes connected. The 5th one is > unconnected. > > > What is the situation in your board Liu Ying? > > > > The adapter cards I'm using to connect with i.MX8MP EVK have only 4 > > LVDS data lanes routed out. > > What about the bridge SoC. I don't understand why the driver gets limited by a particular add-on card. Bridge SoC supports up to 5 Rx Lanes. But vendors do the wiring to bridge SoC and currently as far as we know there are 2 boards with ITE 6263 bridge SoC and both of them has 4 LVDS rx lanes connected and both vesa-24 and Jeida-24 formats are tested. Cheers, Biju