[Intel-gfx] [PATCH 04/11] drm/i915: Add EDID read in intel_dp_check_link_status() for Link CTS 4.2.2.1

[Paulo Zanoni]

2015-04-10 13:12 GMT-03:00 Todd Previte <tprevite at gmail.com>:
> Adds in an EDID read after the DPCD read to accommodate test 4.2.2.1 in the
> Displayport Link CTS Core 1.2 rev1.1. This test requires an EDID read for
> all HPD plug events. To reduce the amount of code, this EDID read is also
> used for Link CTS tests 4.2.2.3, 4.2.2.4, 4.2.2.5 and 4.2.2.6. Actual
> support for these tests is implemented in later patches in this series.
>
> Signed-off-by: Todd Previte <tprevite at gmail.com>

drivers/gpu/drm/i915/intel_dp.c: In function ‘intel_dp_check_link_status’:
drivers/gpu/drm/i915/intel_dp.c:4140:36: error: ‘struct drm_connector’
has no member named ‘edid_header_corrupt’
         if (!edid_read || connector->edid_header_corrupt == 1) {

scripts/Makefile.build:258: recipe for target
'drivers/gpu/drm/i915/intel_dp.o' failed
make[4]: *** [drivers/gpu/drm/i915/intel_dp.o] Error 1

> ---
>  drivers/gpu/drm/i915/intel_dp.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 23184b0..a5dfaff 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -3890,6 +3890,9 @@ intel_dp_check_link_status(struct intel_dp *intel_dp)
>  {
>         struct drm_device *dev = intel_dp_to_dev(intel_dp);
>         struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base;
> +       struct drm_connector *connector = &intel_dp->attached_connector->base;
> +       struct i2c_adapter *adapter = &intel_dp->aux.ddc;
> +       struct edid *edid_read = NULL;
>         u8 sink_irq_vector;
>         u8 link_status[DP_LINK_STATUS_SIZE];
>
> @@ -3906,6 +3909,14 @@ intel_dp_check_link_status(struct intel_dp *intel_dp)
>                 return;
>         }
>
> +       /* Displayport Link CTS Core 1.2 rev1.1 EDID testing
> +        * 4.2.2.1 - EDID read required for all HPD events
> +         */
> +        edid_read = drm_get_edid(connector, adapter);
> +        if (!edid_read || connector->edid_header_corrupt == 1) {
> +                DRM_DEBUG_DRIVER("Invalid EDID detected\n");
> +        }
> +
>         /* Try to read the source of the interrupt */
>         if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
>             intel_dp_get_sink_irq(intel_dp, &sink_irq_vector)) {
> --
> 1.9.1
>
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-- 
Paulo Zanoni