From b66a8abaa48accd3d4b93c1820bbd995fa26ed78 Mon Sep 17 00:00:00 2001 From: Ankit Nautiyal Date: Thu, 13 Apr 2023 14:24:42 -0700 Subject: [PATCH] drm/i915/display/mtl: Fill port width in DDI_BUF_/TRANS_DDI_FUNC_/PORT_BUF_CTL for HDMI MTL requires the PORT_CTL_WIDTH, TRANS_DDI_FUNC_CTL and DDI_BUF_CTL to be filled with 4 lanes for TMDS mode. This patch enables D2D link and fills PORT_WIDTH in appropriate registers. v2: - Added fixes from Clint's Add HDMI implementation changes. - Modified commit message. v3: - Use TRANS_DDI_PORT_WIDTH() instead of DDI_PORT_WIDTH() for the value of TRANS_DDI_FUNC_CTL_*. (Gustavo) Cc: Taylor, Clinton A Signed-off-by: Ankit Nautiyal Signed-off-by: Radhakrishna Sripada Signed-off-by: Mika Kahola Reviewed-by: Imre Deak Link: https://patchwork.freedesktop.org/patch/msgid/20230413212443.1504245-9-radhakrishna.sripada@intel.com --- drivers/gpu/drm/i915/display/intel_ddi.c | 32 ++++++++++++++++++++++++++++++-- drivers/gpu/drm/i915/i915_reg.h | 2 ++ 2 files changed, 32 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 842095a..2ef1af9 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -541,6 +541,8 @@ intel_ddi_transcoder_func_reg_val_get(struct intel_encoder *encoder, temp |= TRANS_DDI_HDMI_SCRAMBLING; if (crtc_state->hdmi_high_tmds_clock_ratio) temp |= TRANS_DDI_HIGH_TMDS_CHAR_RATE; + if (DISPLAY_VER(dev_priv) >= 14) + temp |= TRANS_DDI_PORT_WIDTH(crtc_state->lane_count); } else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_ANALOG)) { temp |= TRANS_DDI_MODE_SELECT_FDI_OR_128B132B; temp |= (crtc_state->fdi_lanes - 1) << 1; @@ -3157,6 +3159,10 @@ static void intel_enable_ddi_hdmi(struct intel_atomic_state *state, if (has_buf_trans_select(dev_priv)) hsw_prepare_hdmi_ddi_buffers(encoder, crtc_state); + /* e. Enable D2D Link for C10/C20 Phy */ + if (DISPLAY_VER(dev_priv) >= 14) + mtl_ddi_enable_d2d(encoder); + encoder->set_signal_levels(encoder, crtc_state); /* Display WA #1143: skl,kbl,cfl */ @@ -3202,12 +3208,30 @@ static void intel_enable_ddi_hdmi(struct intel_atomic_state *state, * * On ADL_P the PHY link rate and lane count must be programmed but * these are both 0 for HDMI. + * + * But MTL onwards HDMI2.1 is supported and in TMDS mode this + * is filled with lane count, already set in the crtc_state. + * The same is required to be filled in PORT_BUF_CTL for C10/20 Phy. */ buf_ctl = dig_port->saved_port_bits | DDI_BUF_CTL_ENABLE; - if (IS_ALDERLAKE_P(dev_priv) && intel_phy_is_tc(dev_priv, phy)) { + if (DISPLAY_VER(dev_priv) >= 14) { + u8 lane_count = mtl_get_port_width(crtc_state->lane_count); + u32 port_buf = 0; + + port_buf |= XELPDP_PORT_WIDTH(lane_count); + + if (dig_port->saved_port_bits & DDI_BUF_PORT_REVERSAL) + port_buf |= XELPDP_PORT_REVERSAL; + + intel_de_rmw(dev_priv, XELPDP_PORT_BUF_CTL1(port), + XELPDP_PORT_WIDTH_MASK | XELPDP_PORT_REVERSAL, port_buf); + + buf_ctl |= DDI_PORT_WIDTH(lane_count); + } else if (IS_ALDERLAKE_P(dev_priv) && intel_phy_is_tc(dev_priv, phy)) { drm_WARN_ON(&dev_priv->drm, !intel_tc_port_in_legacy_mode(dig_port)); buf_ctl |= DDI_BUF_CTL_TC_PHY_OWNERSHIP; } + intel_de_write(dev_priv, DDI_BUF_CTL(port), buf_ctl); intel_wait_ddi_buf_active(dev_priv, port); @@ -3668,7 +3692,11 @@ static void intel_ddi_read_func_ctl(struct intel_encoder *encoder, fallthrough; case TRANS_DDI_MODE_SELECT_DVI: pipe_config->output_types |= BIT(INTEL_OUTPUT_HDMI); - pipe_config->lane_count = 4; + if (DISPLAY_VER(dev_priv) >= 14) + pipe_config->lane_count = + ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1; + else + pipe_config->lane_count = 4; break; case TRANS_DDI_MODE_SELECT_DP_SST: if (encoder->type == INTEL_OUTPUT_EDP) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 33bc060..024a92f 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -5586,6 +5586,8 @@ enum skl_power_gate { #define TRANS_DDI_HDCP_SELECT REG_BIT(5) #define TRANS_DDI_BFI_ENABLE (1 << 4) #define TRANS_DDI_HIGH_TMDS_CHAR_RATE (1 << 4) +#define TRANS_DDI_PORT_WIDTH_MASK REG_GENMASK(3, 1) +#define TRANS_DDI_PORT_WIDTH(width) REG_FIELD_PREP(TRANS_DDI_PORT_WIDTH_MASK, (width) - 1) #define TRANS_DDI_HDMI_SCRAMBLING (1 << 0) #define TRANS_DDI_HDMI_SCRAMBLING_MASK (TRANS_DDI_HDMI_SCRAMBLER_CTS_ENABLE \ | TRANS_DDI_HDMI_SCRAMBLER_RESET_FREQ \ -- 2.7.4