Re: [PATCH] drm/bridge: parade-ps8640: Wait for HPD when doing an AUX transfer

Hi, On Mon, Dec 25, 2023 at 1:08 AM Pin-yen Lin wrote: > > Hi, > > On Fri, Dec 22, 2023 at 11:34 PM Doug Anderson wrote: > > > > Hi, > > > > On Fri, Dec 22, 2023 at 2:29 AM Pin-yen Lin wrote: > > > > > > Hi Douglas, > > > > > > On Fri, Dec 22, 2023 at 5:56 AM Douglas Anderson > > > wrote: >

Re: [PATCH] drm/bridge: parade-ps8640: Wait for HPD when doing an AUX transfer

Hi, On Fri, Dec 22, 2023 at 11:34 PM Doug Anderson wrote: > > Hi, > > On Fri, Dec 22, 2023 at 2:29 AM Pin-yen Lin wrote: > > > > Hi Douglas, > > > > On Fri, Dec 22, 2023 at 5:56 AM Douglas Anderson > > wrote: > > > > > > Unlike what is claimed in commit f5aa7d46b0ee ("drm/bridge: > > >

Re: [PATCH] drm/bridge: parade-ps8640: Wait for HPD when doing an AUX transfer

Hi, On Fri, Dec 22, 2023 at 2:29 AM Pin-yen Lin wrote: > > Hi Douglas, > > On Fri, Dec 22, 2023 at 5:56 AM Douglas Anderson > wrote: > > > > Unlike what is claimed in commit f5aa7d46b0ee ("drm/bridge: > > parade-ps8640: Provide wait_hpd_asserted() in struct drm_dp_aux"), if > > someone

Re: [PATCH] drm/bridge: parade-ps8640: Wait for HPD when doing an AUX transfer

Hi Douglas, On Fri, Dec 22, 2023 at 5:56 AM Douglas Anderson wrote: > > Unlike what is claimed in commit f5aa7d46b0ee ("drm/bridge: > parade-ps8640: Provide wait_hpd_asserted() in struct drm_dp_aux"), if > someone manually tries to do an AUX transfer (like via `i2cdump ${bus} > 0x50 i`) while

[PATCH] drm/bridge: parade-ps8640: Wait for HPD when doing an AUX transfer

Unlike what is claimed in commit f5aa7d46b0ee ("drm/bridge: parade-ps8640: Provide wait_hpd_asserted() in struct drm_dp_aux"), if someone manually tries to do an AUX transfer (like via `i2cdump ${bus} 0x50 i`) while the panel is off we don't just get a simple transfer error. Instead, the whole