On Fri, Mar 06, 2015 at 03:53:32PM -0800, Jesse Barnes wrote:
> So try to enumerate eDP unconditionally in those cases.
>
> Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
That's WaIgnoreDDIAStrap, I assumed it actually worked since my eDP
panel was detected... I see it listed without a stepping check but I
guess you have a good source for that one.
So, maybe with the WaIgnoreDDIAStrap mention:
Reviewed-by: Damien Lespiau <damien.lespiau@xxxxxxxxx>
--
Damien
> ---
> drivers/gpu/drm/i915/intel_display.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 597c10b..8820e8a 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -12563,10 +12563,15 @@ static void intel_setup_outputs(struct drm_device *dev)
> if (HAS_DDI(dev)) {
> int found;
>
> - /* Haswell uses DDI functions to detect digital outputs */
> + /*
> + * Haswell uses DDI functions to detect digital outputs.
> + * On SKL pre-D0 the strap isn't connected, so we assume
> + * it's there.
> + */
> found = I915_READ(DDI_BUF_CTL_A) & DDI_INIT_DISPLAY_DETECTED;
> /* DDI A only supports eDP */
> - if (found)
> + if (found ||
> + (IS_SKYLAKE(dev) && INTEL_REVID(dev) < SKL_REVID_D0))
> intel_ddi_init(dev, PORT_A);
>
> /* DDI B, C and D detection is indicated by the SFUSE_STRAP
> --
> 1.9.1
>
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