diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 37 |
1 files changed, 23 insertions, 14 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 6d5988f0f067..f5fd106e555c 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -2198,6 +2198,18 @@ static int intel_dp_hdmi_sink_max_frl(struct intel_dp *intel_dp) return max_frl_rate; } +static bool +intel_dp_pcon_is_frl_trained(struct intel_dp *intel_dp, + u8 max_frl_bw_mask, u8 *frl_trained_mask) +{ + if (drm_dp_pcon_hdmi_link_active(&intel_dp->aux) && + drm_dp_pcon_hdmi_link_mode(&intel_dp->aux, frl_trained_mask) == DP_PCON_HDMI_MODE_FRL && + *frl_trained_mask >= max_frl_bw_mask) + return true; + + return false; +} + static int intel_dp_pcon_start_frl_training(struct intel_dp *intel_dp) { #define TIMEOUT_FRL_READY_MS 500 @@ -2208,10 +2220,6 @@ static int intel_dp_pcon_start_frl_training(struct intel_dp *intel_dp) u8 max_frl_bw_mask = 0, frl_trained_mask; bool is_active; - ret = drm_dp_pcon_reset_frl_config(&intel_dp->aux); - if (ret < 0) - return ret; - max_pcon_frl_bw = intel_dp->dfp.pcon_max_frl_bw; drm_dbg(&i915->drm, "PCON max rate = %d Gbps\n", max_pcon_frl_bw); @@ -2223,6 +2231,12 @@ static int intel_dp_pcon_start_frl_training(struct intel_dp *intel_dp) if (max_frl_bw <= 0) return -EINVAL; + max_frl_bw_mask = intel_dp_pcon_set_frl_mask(max_frl_bw); + drm_dbg(&i915->drm, "MAX_FRL_BW_MASK = %u\n", max_frl_bw_mask); + + if (intel_dp_pcon_is_frl_trained(intel_dp, max_frl_bw_mask, &frl_trained_mask)) + goto frl_trained; + ret = drm_dp_pcon_frl_prepare(&intel_dp->aux, false); if (ret < 0) return ret; @@ -2232,7 +2246,6 @@ static int intel_dp_pcon_start_frl_training(struct intel_dp *intel_dp) if (!is_active) return -ETIMEDOUT; - max_frl_bw_mask = intel_dp_pcon_set_frl_mask(max_frl_bw); ret = drm_dp_pcon_frl_configure_1(&intel_dp->aux, max_frl_bw, DP_PCON_ENABLE_SEQUENTIAL_LINK); if (ret < 0) @@ -2248,19 +2261,15 @@ static int intel_dp_pcon_start_frl_training(struct intel_dp *intel_dp) * Wait for FRL to be completed * Check if the HDMI Link is up and active. */ - wait_for(is_active = drm_dp_pcon_hdmi_link_active(&intel_dp->aux) == true, TIMEOUT_HDMI_LINK_ACTIVE_MS); + wait_for(is_active = + intel_dp_pcon_is_frl_trained(intel_dp, max_frl_bw_mask, &frl_trained_mask), + TIMEOUT_HDMI_LINK_ACTIVE_MS); if (!is_active) return -ETIMEDOUT; - /* Verify HDMI Link configuration shows FRL Mode */ - if (drm_dp_pcon_hdmi_link_mode(&intel_dp->aux, &frl_trained_mask) != - DP_PCON_HDMI_MODE_FRL) { - drm_dbg(&i915->drm, "HDMI couldn't be trained in FRL Mode\n"); - return -EINVAL; - } - drm_dbg(&i915->drm, "MAX_FRL_MASK = %u, FRL_TRAINED_MASK = %u\n", max_frl_bw_mask, frl_trained_mask); - +frl_trained: + drm_dbg(&i915->drm, "FRL_TRAINED_MASK = %u\n", frl_trained_mask); intel_dp->frl.trained_rate_gbps = intel_dp_pcon_get_frl_mask(frl_trained_mask); intel_dp->frl.is_trained = true; drm_dbg(&i915->drm, "FRL trained with : %d Gbps\n", intel_dp->frl.trained_rate_gbps); |