On Thu, Jul 1, 2010 at 10:07 AM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
> On Mon, Jun 21, 2010 at 09:18:01PM +0300, Pasi Kärkkäinen wrote:
>> > >>
>> > >> I am not sure your patch is right, my guess is that devices field of
>> > >> radeon connector structure btw the HDMI & DVI connector are different
>> > >> and thus that drm_detect_hdmi_monitor is not call. I expect it's normal
>> > >> for the device field to be different (my understanding being that HDMI
>> > >> will have one more bit set than the DVI connector). Bottom line is
>> > >> i think we want to discard non hdmi connector just in case we face
>> > >> shared connector.
>> > >>
>> > >> Alex would have to comment on the device field test, maybe your atombios
>> > >> is broken. Does it works if instead of removing
>> > >> if (connector == list_connector)
>> > >> continue;
>> > >> You remove :
>> > >> if (radeon_connector->devices == list_radeon_connector->devices)
>> > >>
>> > >> Also can you print the radeon_connector->devices of all your connector
>> > >> so we can compare them.
>> > >
>> > > The code was for systems with shared ddc lines and shared encoders,
>> > > but it looks like your system may have a shared ddc line and (sort of)
>> > > non-shared encoders. I suspect the DVI port is using UNIPHY A or A+B
>> > > (for dual link) and HDMI is using UNIPHY link B. It's probably
>> > > actually using router objects (gpio toggle to switch gpio routing
>> > > between physical ports), however support for that is not implemented
>> > > yet which is why we have the current code. Can you send me a copy of
>> > > your vbios so I can verify?
>> > >
>> > > To access your vbios (as root):
>> > > cd /sys/bus/pci/device/<pci bus id>
>> > > echo 1 > rom
>> > > cat rom > /tmp/vbios.rom
>> > > echo 0 > rom
>> >
>> > Does the attached patch fix the issue?
>> >
>>
>> Thanks for the patch. I'll try it when I'm back where the dock is.. will take a couple of days.
>>
>
> Sorry it took a while.. I tried your patch now.
> It seems to fix the problem!
>
> When you send it upstream please also CC it for 2.6.33/2.6.34 stable branches?
> Just hoping to get the fix into Fedora 13..
>
I've sent the patch to Dave and cc'ed stable.
Alex
> -- Pasi
>
>>
>>
>> > From 557b452536c9390105539a264d342d963d71b087 Mon Sep 17 00:00:00 2001
>> > From: Alex Deucher <alexdeucher@xxxxxxxxx>
>> > Date: Mon, 21 Jun 2010 12:07:52 -0400
>> > Subject: [PATCH] drm/radeon/kms: fix shared ddc handling
>> > MIME-Version: 1.0
>> > Content-Type: text/plain; charset=UTF-8
>> > Content-Transfer-Encoding: 8bit
>> >
>> > Connectors with a shared ddc line can be connected to different
>> > encoders.
>> >
>> > Reported by Pasi Kärkkäinen <pasik@xxxxxx> on dri-devel
>> >
>> > Signed-off-by: Alex Deucher <alexdeucher@xxxxxxxxx>
>> > ---
>> > drivers/gpu/drm/radeon/radeon_connectors.c | 4 +++-
>> > 1 files changed, 3 insertions(+), 1 deletions(-)
>> >
>> > diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
>> > index 0c7ccc6..f58f8bd 100644
>> > --- a/drivers/gpu/drm/radeon/radeon_connectors.c
>> > +++ b/drivers/gpu/drm/radeon/radeon_connectors.c
>> > @@ -785,7 +785,9 @@ static enum drm_connector_status radeon_dvi_detect(struct drm_connector *connect
>> > if (connector == list_connector)
>> > continue;
>> > list_radeon_connector = to_radeon_connector(list_connector);
>> > - if (radeon_connector->devices == list_radeon_connector->devices) {
>> > + if (list_radeon_connector->shared_ddc &&
>> > + (list_radeon_connector->ddc_bus->rec.i2c_id ==
>> > + radeon_connector->ddc_bus->rec.i2c_id)) {
>> > if (drm_detect_hdmi_monitor(radeon_connector->edid)) {
>> > if (connector->connector_type == DRM_MODE_CONNECTOR_DVID) {
>> > kfree(radeon_connector->edid);
>> > --
>> > 1.7.0.1
>> >
>>
>
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