Re: [PATCH 12/17] drm/i915: Update intel_dp_compute_config() to handle compliance test requests

[Paulo Zanoni <przanoni@gmail.com>]

2014-12-10 21:53 GMT-02:00 Todd Previte <tprevite@gmail.com>:
> Adds provisions in intel_dp_compute_config() to accommodate compliance
> testing. Mostly this invovles circumventing the automatic link configuration
> parameters and allowing the compliance code to set those parameters as
> required by the tests.
>
> Signed-off-by: Todd Previte <tprevite@gmail.com>
> ---
>  drivers/gpu/drm/i915/intel_dp.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 2a13124..4a55ca6 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -1189,6 +1189,21 @@ intel_dp_compute_config(struct intel_encoder *encoder,
>         pipe_config->has_drrs = false;
>         pipe_config->has_audio = intel_dp->has_audio;
>
> +       /* Compliance testing should skip most of this function */
> +       if (!is_edp(intel_dp) && intel_dp->compliance_testing_active) {

I couldn't find any patch on your series that flips
intel_dp->compliance_testing_active to true, which is weird since it
would prevent us from testing the code.

Also, if we can make sure that we never set compliance_testing_active
to true on eDP, we can remove the is_edp() check.

> +               bpp = intel_dp->compliance_config.bits_per_pixel;
> +               lane_count = intel_dp->compliance_config.lane_count;
> +               clock = intel_dp->compliance_config.link_rate >> 3;
> +               /* Assign here and skip at the end - ensures correct values */
> +               intel_dp->link_bw = bws[clock];
> +               intel_dp->lane_count = lane_count;
> +               pipe_config->pipe_bpp = bpp;
> +               pipe_config->port_clock =
> +                       drm_dp_bw_code_to_link_rate(intel_dp->link_bw);
> +
> +               goto compliance_exit;
> +       }
> +
>         if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) {
>                 intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
>                                        adjusted_mode);
> @@ -1275,6 +1290,7 @@ found:
>         DRM_DEBUG_KMS("DP link bw required %i available %i\n",
>                       mode_rate, link_avail);
>
> +compliance_exit:

Don't we need to move the color range adjustments to this point?

>         intel_link_compute_m_n(bpp, lane_count,
>                                adjusted_mode->crtc_clock,
>                                pipe_config->port_clock,
> --
> 1.9.1
>
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-- 
Paulo Zanoni
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