Quoting Vamsi Krishna Brahmajosyula (2024-09-17 09:44:49-03:00) >In DP alt mode, when pin assignment is D, only one PHY lane is owned >by the display. intel_cx0pll_enable currently performs a power state >ready on both the lanes in all cases. > >Address the todo to perfom power state ready on owned lanes. > >Tested on Meteor Lake-P [Intel Arc Graphics] with DP alt mode. > >v2 -> v3: >- Fix changelog per Jani Nikula's feedback >v1 -> v2: Address Gustavo Sousa's feedback >- Use owned lanes mask to set Phy power state to Ready, instead of > maxpclk_lane with DP alt mode check. >- Owned lanes are obtained from intel_cx0_get_owned_lane_mask(). > >Signed-off-by: Vamsi Krishna Brahmajosyula <vamsikrishna.brahmajosyula@xxxxxxxxx> Reviewed-by: Gustavo Sousa <gustavo.sousa@xxxxxxxxx> For some reason this is not showing up on Patchwork[1]. [1]: https://patchwork.freedesktop.org/project/intel-gfx/series/ -- Gustavo Sousa >--- > drivers/gpu/drm/i915/display/intel_cx0_phy.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > >diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c >index 4a6c3040ca15..cbed53d3b250 100644 >--- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c >+++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c >@@ -2934,6 +2934,7 @@ static void intel_cx0pll_enable(struct intel_encoder *encoder, > enum phy phy = intel_encoder_to_phy(encoder); > struct intel_digital_port *dig_port = enc_to_dig_port(encoder); > bool lane_reversal = dig_port->saved_port_bits & DDI_BUF_PORT_REVERSAL; >+ u8 owned_lane_mask = intel_cx0_get_owned_lane_mask(encoder); > u8 maxpclk_lane = lane_reversal ? INTEL_CX0_LANE1 : > INTEL_CX0_LANE0; > intel_wakeref_t wakeref = intel_cx0_phy_transaction_begin(encoder); >@@ -2948,10 +2949,9 @@ static void intel_cx0pll_enable(struct intel_encoder *encoder, > intel_cx0_phy_lane_reset(encoder, lane_reversal); > > /* >- * 3. Change Phy power state to Ready. >- * TODO: For DP alt mode use only one lane. >+ * 3. Change Phy power state to Ready on owned lanes. > */ >- intel_cx0_powerdown_change_sequence(encoder, INTEL_CX0_BOTH_LANES, >+ intel_cx0_powerdown_change_sequence(encoder, owned_lane_mask, > CX0_P2_STATE_READY); > > /* > >base-commit: ad060dbbcfcfcba624ef1a75e1d71365a98b86d8 >-- >2.46.0 >
