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> --- Patch version removed so that patchwork would recognize the entry 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
