From dc5b3ef88ba7cc9f2748b75b6b127b2b400315cc Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Thu, 20 Nov 2025 19:23:57 +0200 Subject: [PATCH] drm/i915/cx0: Read out power-down state of both TXs in PHY lane 0 If the number of used lanes is 1 or 2 then the power-down state of both TX lanes in PHY lane 0 should be read out. If 1 lane is used only 1 TX lane will be checked, make sure both TXs are checked in this case. Cc: Mika Kahola Cc: Suraj Kandpal Fixes: 230d4c748113 ("drm/i915/cx0: Track the Cx0 PHY enabled lane count in the PLL state") Reviewed-by: Suraj Kandpal Signed-off-by: Imre Deak Link: https://patch.msgid.link/20251120172358.1282765-4-imre.deak@intel.com --- drivers/gpu/drm/i915/display/intel_cx0_phy.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c index 96ab7f3b5539..0d524735dcf9 100644 --- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c @@ -2209,7 +2209,7 @@ static int readout_enabled_lane_count(struct intel_encoder *encoder) */ max_tx_lane_count = DDI_PORT_WIDTH_GET(intel_de_read(display, DDI_BUF_CTL(encoder->port))); if (!drm_WARN_ON(display->drm, max_tx_lane_count == 0)) - max_tx_lane_count = roundup_pow_of_two(max_tx_lane_count); + max_tx_lane_count = round_up(max_tx_lane_count, 2); for (tx_lane = 0; tx_lane < max_tx_lane_count; tx_lane++) { u8 phy_lane_mask = tx_lane < 2 ? INTEL_CX0_LANE0 : INTEL_CX0_LANE1; -- 2.47.3