From: Gustavo Sousa <gustavo.sousa@xxxxxxxxx> Display must not enable or disable transmitters for not-owned PHY lanes. BSpec: 64539 Reviewed-by: Mika Kahola <mika.kahola@xxxxxxxxx> Signed-off-by: Gustavo Sousa <gustavo.sousa@xxxxxxxxx> Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20230814131331.69516-4-gustavo.sousa@xxxxxxxxx (cherry picked from commit 6a62986bb52e3c96372d92486f9461190144a66b) --- drivers/gpu/drm/i915/display/intel_cx0_phy.c | 9 ++++++--- 1 file changed, 6 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 2b112ed78943..93d3a63fe89a 100644 --- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c @@ -2607,10 +2607,11 @@ static void intel_cx0_program_phy_lane(struct drm_i915_private *i915, int i; u8 disables; bool dp_alt_mode = intel_tc_port_in_dp_alt_mode(enc_to_dig_port(encoder)); + u8 owned_lane_mask = intel_cx0_get_owned_lane_mask(i915, encoder); enum port port = encoder->port; if (intel_is_c10phy(i915, intel_port_to_phy(i915, port))) - intel_cx0_rmw(i915, port, INTEL_CX0_BOTH_LANES, + intel_cx0_rmw(i915, port, owned_lane_mask, PHY_C10_VDR_CONTROL(1), 0, C10_VDR_CTRL_MSGBUS_ACCESS, MB_WRITE_COMMITTED); @@ -2625,11 +2626,13 @@ static void intel_cx0_program_phy_lane(struct drm_i915_private *i915, disables |= REG_FIELD_PREP8(REG_GENMASK8(1, 0), 0x1); } - /* TODO: DP-alt MFD case where only one PHY lane should be programmed. */ for (i = 0; i < 4; i++) { int tx = i % 2 + 1; u8 lane_mask = i < 2 ? INTEL_CX0_LANE0 : INTEL_CX0_LANE1; + if (!(owned_lane_mask & lane_mask)) + continue; + intel_cx0_rmw(i915, port, lane_mask, PHY_CX0_TX_CONTROL(tx, 2), CONTROL2_DISABLE_SINGLE_TX, disables & BIT(i) ? CONTROL2_DISABLE_SINGLE_TX : 0, @@ -2637,7 +2640,7 @@ static void intel_cx0_program_phy_lane(struct drm_i915_private *i915, } if (intel_is_c10phy(i915, intel_port_to_phy(i915, port))) - intel_cx0_rmw(i915, port, INTEL_CX0_BOTH_LANES, + intel_cx0_rmw(i915, port, owned_lane_mask, PHY_C10_VDR_CONTROL(1), 0, C10_VDR_CTRL_UPDATE_CFG, MB_WRITE_COMMITTED); -- 2.40.1
