From: Imre Deak Date: Fri, 28 Jun 2019 14:36:35 +0000 (+0300) Subject: drm/i915: WARN about invalid lane reversal in TBT-alt/DP-alt modes X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=3ee2771e47b038624d68aa051d78ff8558c260b9;p=openwrt%2Fstaging%2Fblogic.git drm/i915: WARN about invalid lane reversal in TBT-alt/DP-alt modes Lane reversal happens only in the FIA module for TBT-alt/DP-alt mode, so WARN if lane reversal is attempted at a different level. See the BSpec DDI_BUF_CTL register description. Cc: Manasi Navare Cc: José Roberto de Souza Cc: Rodrigo Vivi Signed-off-by: Imre Deak Reviewed-by: José Roberto de Souza Link: https://patchwork.freedesktop.org/patch/msgid/20190628143635.22066-24-imre.deak@intel.com --- diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 8b5350931d16..747b68037fea 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -3604,6 +3604,8 @@ static void intel_ddi_set_fia_lane_count(struct intel_encoder *encoder, u32 val = I915_READ(PORT_TX_DFLEXDPMLE1); bool lane_reversal = dig_port->saved_port_bits & DDI_BUF_PORT_REVERSAL; + WARN_ON(lane_reversal && dig_port->tc_mode != TC_PORT_LEGACY); + val &= ~DFLEXDPMLE1_DPMLETC_MASK(tc_port); switch (pipe_config->lane_count) { case 1: