On Wed, 18 Sep 2024, Ville Syrjala <[email protected]> wrote:
> From: Ville Syrjälä <[email protected]>
>
> Declutter intel_edp_init_dpcd() a bit by extracting the sink
> rates probing into its own function.
>
> Signed-off-by: Ville Syrjälä <[email protected]>
> ---
> drivers/gpu/drm/i915/display/intel_dp.c | 76 +++++++++++++------------
> 1 file changed, 40 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index 6a1b0e93a1fc..ae3f242fa925 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -4066,6 +4066,45 @@ static void intel_edp_mso_init(struct intel_dp
> *intel_dp)
> intel_dp->mso_pixel_overlap = mso ? info->mso_pixel_overlap : 0;
> }
>
> +static void
> +intel_edp_set_sink_rates(struct intel_dp *intel_dp)
> +{
> + intel_dp->num_sink_rates = 0;
> +
> + if (intel_dp->edp_dpcd[0] >= DP_EDP_14) {
> + __le16 sink_rates[DP_MAX_SUPPORTED_RATES];
> + int i;
> +
> + drm_dp_dpcd_read(&intel_dp->aux, DP_SUPPORTED_LINK_RATES,
> + sink_rates, sizeof(sink_rates));
> +
> + for (i = 0; i < ARRAY_SIZE(sink_rates); i++) {
> + int val = le16_to_cpu(sink_rates[i]);
> +
> + if (val == 0)
> + break;
> +
> + /* Value read multiplied by 200kHz gives the per-lane
> + * link rate in kHz. The source rates are, however,
> + * stored in terms of LS_Clk kHz. The full conversion
> + * back to symbols is
> + * (val * 200kHz)*(8/10 ch. encoding)*(1/8 bit to Byte)
> + */
> + intel_dp->sink_rates[i] = (val * 200) / 10;
> + }
> + intel_dp->num_sink_rates = i;
> + }
> +
> + /*
> + * Use DP_LINK_RATE_SET if DP_SUPPORTED_LINK_RATES are available,
> + * default to DP_MAX_LINK_RATE and DP_LINK_BW_SET otherwise.
> + */
> + if (intel_dp->num_sink_rates)
> + intel_dp->use_rate_select = true;
> + else
> + intel_dp_set_sink_rates(intel_dp);
Isn't this kind of in the wrong place, it's not eDP?
> +}
> +
> static bool
> intel_edp_init_dpcd(struct intel_dp *intel_dp, struct intel_connector
> *connector)
> {
> @@ -4110,42 +4149,7 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp, struct
> intel_connector *connector
> */
> intel_psr_init_dpcd(intel_dp);
>
> - /* Clear the default sink rates */
> - intel_dp->num_sink_rates = 0;
> -
> - /* Read the eDP 1.4+ supported link rates. */
> - if (intel_dp->edp_dpcd[0] >= DP_EDP_14) {
> - __le16 sink_rates[DP_MAX_SUPPORTED_RATES];
> - int i;
> -
> - drm_dp_dpcd_read(&intel_dp->aux, DP_SUPPORTED_LINK_RATES,
> - sink_rates, sizeof(sink_rates));
> -
> - for (i = 0; i < ARRAY_SIZE(sink_rates); i++) {
> - int val = le16_to_cpu(sink_rates[i]);
> -
> - if (val == 0)
> - break;
> -
> - /* Value read multiplied by 200kHz gives the per-lane
> - * link rate in kHz. The source rates are, however,
> - * stored in terms of LS_Clk kHz. The full conversion
> - * back to symbols is
> - * (val * 200kHz)*(8/10 ch. encoding)*(1/8 bit to Byte)
> - */
> - intel_dp->sink_rates[i] = (val * 200) / 10;
> - }
> - intel_dp->num_sink_rates = i;
> - }
> -
> - /*
> - * Use DP_LINK_RATE_SET if DP_SUPPORTED_LINK_RATES are available,
> - * default to DP_MAX_LINK_RATE and DP_LINK_BW_SET otherwise.
> - */
> - if (intel_dp->num_sink_rates)
> - intel_dp->use_rate_select = true;
> - else
> - intel_dp_set_sink_rates(intel_dp);
> + intel_edp_set_sink_rates(intel_dp);
> intel_dp_set_max_sink_lane_count(intel_dp);
>
> /* Read the eDP DSC DPCD registers */
--
Jani Nikula, Intel
