From: Mario Kleiner <mario.kleiner.de@gmail.com> To: "Ville Syrjälä" <ville.syrjala@linux.intel.com> Cc: mario.kleiner.de@gmail.de, intel-gfx <intel-gfx@lists.freedesktop.org>, dri-devel <dri-devel@lists.freedesktop.org>, Daniel Vetter <daniel.vetter@ffwll.ch> Subject: Re: [PATCH] drm/i915/dp: Add current maximum eDP link rate to sink_rate array. Date: Thu, 9 Jan 2020 21:19:07 +0100 [thread overview] Message-ID: <CAEsyxyiTxRZC=Mw4rKvjCQO557Qg6Q2JRkoUvQWOia7SxumznA@mail.gmail.com> (raw) In-Reply-To: <20200109182408.GF13686@intel.com> [-- Attachment #1.1: Type: text/plain, Size: 1851 bytes --] On Thu, Jan 9, 2020 at 7:24 PM Ville Syrjälä <ville.syrjala@linux.intel.com> wrote: > On Thu, Jan 09, 2020 at 06:57:14PM +0100, Mario Kleiner wrote: > > On Thu, Jan 9, 2020 at 5:47 PM Ville Syrjälä < > ville.syrjala@linux.intel.com> > > wrote: > > > > > On Thu, Jan 09, 2020 at 05:30:05PM +0100, Mario Kleiner wrote: > > > > On Thu, Jan 9, 2020 at 4:38 PM Ville Syrjälä < > > > ville.syrjala@linux.intel.com> > > > > wrote: > > > > > > wouldn't work if dpcd[0x1] == 0xa, which it likely is [*]. AMD DC > > identified it as DP 1.1, eDP 1.3, and these extended caps seem to be only > > part of DP 1.3+ if i understand the comments in > > intel_dp_extended_receiver_capabilities() correctly. > > Ok, looking at previous debug output logs shows that those extended caps are not present on the systems, ie. that extended caps bit is not set. So dpcd[0x1] == 0xa. > Yeah, but you never know how creative they've been with the DPCD in > such a propritary machine. A full DPCD dump from /dev/drm_dp_aux* would > be nice. Can you file a bug an attach the DPCD dump there so we have a > good reference on what we're talking about (also for future if/when > someone eventually starts to wonder why we have such hacks in the > code)? > > True, it's Apple which likes to "Think different..." :/ Will do. But is there a proper/better way to do the /dev/drm_dp_aux0 dump? I used cat /dev/drm_dp_aux0 > dump, and that hangs, but if i interrupt it after a few seconds, i get a dump file of 512k size, which seems excessive? On AMD DC atm., in case that matters. However, the file shows DPCD_REV 1.1, maximum 0xa and no extended caps ( DP_TRAINING_AUX_RD_INTERVAL <https://elixir.bootlin.com/linux/v5.5-rc5/ident/DP_TRAINING_AUX_RD_INTERVAL> aka [0xe] == 0x00). -mario -- > Ville Syrjälä > Intel > [-- Attachment #1.2: Type: text/html, Size: 2973 bytes --] [-- Attachment #2: Type: text/plain, Size: 160 bytes --] _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
WARNING: multiple messages have this Message-ID (diff)
From: Mario Kleiner <mario.kleiner.de@gmail.com> To: "Ville Syrjälä" <ville.syrjala@linux.intel.com> Cc: mario.kleiner.de@gmail.de, intel-gfx <intel-gfx@lists.freedesktop.org>, dri-devel <dri-devel@lists.freedesktop.org>, Daniel Vetter <daniel.vetter@ffwll.ch> Subject: Re: [Intel-gfx] [PATCH] drm/i915/dp: Add current maximum eDP link rate to sink_rate array. Date: Thu, 9 Jan 2020 21:19:07 +0100 [thread overview] Message-ID: <CAEsyxyiTxRZC=Mw4rKvjCQO557Qg6Q2JRkoUvQWOia7SxumznA@mail.gmail.com> (raw) In-Reply-To: <20200109182408.GF13686@intel.com> [-- Attachment #1.1: Type: text/plain, Size: 1851 bytes --] On Thu, Jan 9, 2020 at 7:24 PM Ville Syrjälä <ville.syrjala@linux.intel.com> wrote: > On Thu, Jan 09, 2020 at 06:57:14PM +0100, Mario Kleiner wrote: > > On Thu, Jan 9, 2020 at 5:47 PM Ville Syrjälä < > ville.syrjala@linux.intel.com> > > wrote: > > > > > On Thu, Jan 09, 2020 at 05:30:05PM +0100, Mario Kleiner wrote: > > > > On Thu, Jan 9, 2020 at 4:38 PM Ville Syrjälä < > > > ville.syrjala@linux.intel.com> > > > > wrote: > > > > > > wouldn't work if dpcd[0x1] == 0xa, which it likely is [*]. AMD DC > > identified it as DP 1.1, eDP 1.3, and these extended caps seem to be only > > part of DP 1.3+ if i understand the comments in > > intel_dp_extended_receiver_capabilities() correctly. > > Ok, looking at previous debug output logs shows that those extended caps are not present on the systems, ie. that extended caps bit is not set. So dpcd[0x1] == 0xa. > Yeah, but you never know how creative they've been with the DPCD in > such a propritary machine. A full DPCD dump from /dev/drm_dp_aux* would > be nice. Can you file a bug an attach the DPCD dump there so we have a > good reference on what we're talking about (also for future if/when > someone eventually starts to wonder why we have such hacks in the > code)? > > True, it's Apple which likes to "Think different..." :/ Will do. But is there a proper/better way to do the /dev/drm_dp_aux0 dump? I used cat /dev/drm_dp_aux0 > dump, and that hangs, but if i interrupt it after a few seconds, i get a dump file of 512k size, which seems excessive? On AMD DC atm., in case that matters. However, the file shows DPCD_REV 1.1, maximum 0xa and no extended caps ( DP_TRAINING_AUX_RD_INTERVAL <https://elixir.bootlin.com/linux/v5.5-rc5/ident/DP_TRAINING_AUX_RD_INTERVAL> aka [0xe] == 0x00). -mario -- > Ville Syrjälä > Intel > [-- Attachment #1.2: Type: text/html, Size: 2973 bytes --] [-- Attachment #2: Type: text/plain, Size: 160 bytes --] _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next prev parent reply other threads:[~2020-01-09 20:19 UTC|newest] Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-01-09 15:07 [PATCH] drm/i915/dp: Add current maximum eDP link rate to sink_rate array Mario Kleiner 2020-01-09 15:07 ` [Intel-gfx] " Mario Kleiner 2020-01-09 15:26 ` Ville Syrjälä 2020-01-09 15:26 ` [Intel-gfx] " Ville Syrjälä 2020-01-09 15:38 ` Ville Syrjälä 2020-01-09 15:38 ` [Intel-gfx] " Ville Syrjälä 2020-01-09 16:30 ` Mario Kleiner 2020-01-09 16:30 ` [Intel-gfx] " Mario Kleiner 2020-01-09 16:47 ` Ville Syrjälä 2020-01-09 16:47 ` [Intel-gfx] " Ville Syrjälä 2020-01-09 17:57 ` Mario Kleiner 2020-01-09 17:57 ` [Intel-gfx] " Mario Kleiner 2020-01-09 18:24 ` Ville Syrjälä 2020-01-09 18:24 ` [Intel-gfx] " Ville Syrjälä 2020-01-09 20:19 ` Mario Kleiner [this message] 2020-01-09 20:19 ` Mario Kleiner 2020-01-10 13:32 ` Ville Syrjälä 2020-01-10 13:32 ` [Intel-gfx] " Ville Syrjälä 2020-01-10 15:50 ` Mario Kleiner 2020-01-10 15:50 ` [Intel-gfx] " Mario Kleiner 2020-01-09 16:31 ` Ville Syrjälä 2020-01-09 16:31 ` [Intel-gfx] " Ville Syrjälä 2020-01-09 16:27 ` Mario Kleiner 2020-01-09 16:27 ` [Intel-gfx] " Mario Kleiner 2020-01-09 15:39 ` Alex Deucher 2020-01-09 15:39 ` [Intel-gfx] " Alex Deucher 2020-01-09 16:46 ` Mario Kleiner 2020-01-09 16:46 ` [Intel-gfx] " Mario Kleiner 2020-01-09 19:49 ` Alex Deucher 2020-01-09 19:49 ` [Intel-gfx] " Alex Deucher 2020-01-09 21:04 ` Mario Kleiner 2020-01-09 21:04 ` [Intel-gfx] " Mario Kleiner 2020-01-09 21:26 ` Harry Wentland 2020-01-09 21:26 ` [Intel-gfx] " Harry Wentland 2020-01-10 16:02 ` Mario Kleiner 2020-01-10 16:02 ` [Intel-gfx] " Mario Kleiner 2020-01-10 18:09 ` Ville Syrjälä 2020-01-10 18:09 ` Ville Syrjälä 2020-01-15 12:34 ` Jani Nikula 2020-01-15 12:34 ` Jani Nikula 2020-01-15 14:17 ` Ville Syrjälä 2020-01-15 14:17 ` Ville Syrjälä 2020-01-09 23:52 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for drm/i915/dp: Add current maximum eDP link rate to sink_rate array. (rev2) Patchwork
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