On Tue, 12 Jun 2012 13:11:41 +0200, Daniel Vetter <[email protected]>
wrote:
> The new oui probe has been missing these.
>
> This issue has been introduce in
>
> commit 0d198328538276c4459ef5de081e68ae60e6c4c2
> Author: Adam Jackson <[email protected]>
> Date: Mon May 14 16:05:47 2012 -0400
>
> drm/i915/dp: Probe branch/sink OUIs
>
> v2: Do the eDP vdd dance of simply not probing the OUI on eDP panels
> as suggested by Chris Wilson.
>
> Cc: Adam Jackson <[email protected]>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=50808
> Reported-by: Linus Torvalds <[email protected]>
> Bugreport: http://permalink.gmane.org/gmane.comp.video.dri.devel/69695
> Tested-by: Yang Guang <[email protected]>
> Signed-Off-by: Daniel Vetter <[email protected]>
> ---
> drivers/gpu/drm/i915/intel_dp.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 296cfc2..fbc30a5 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -1970,6 +1970,8 @@ intel_dp_probe_oui(struct intel_dp *intel_dp)
> {
> u8 buf[3];
>
> + ironlake_edp_panel_vdd_on(intel_dp);
> +
> if (!(intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
> return;
The side effect is that we then need to introduce a layer of onion here.
>
> @@ -1980,6 +1982,8 @@ intel_dp_probe_oui(struct intel_dp *intel_dp)
> if (intel_dp_aux_native_read_retry(intel_dp, DP_BRANCH_OUI, buf, 3))
> DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n",
> buf[0], buf[1], buf[2]);
> +
> + ironlake_edp_panel_vdd_off(intel_dp, false);
> }
--
Chris Wilson, Intel Open Source Technology Centre
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