There has been an update to the BSpec in which we need to set tx_misc=0x5 field for C20 TX Context programming for HDMI TMDS for Xe2_LPD and newer. That field is mapped to the bits 7:0 of SRAM_GENERIC_<A/B>_TX_CNTX_CFG_1, which in turn translates to tx[1] of our state struct. Update the algorithm to reflect this change.
v2: - Fix Bspec reference (Sai Teja) - Use struct intel_display instead of drm_i915_private. (Jani) - Use the correct bit width for C20_PHY_TX_MISC_MASK. (Jani) Bspec: 74491 Cc: Dnyaneshwar Bhadane <[email protected]> Cc: Jani Nikula <[email protected]> Reviewed-by: Sai Teja Pottumuttu <[email protected]> #v1 Signed-off-by: Gustavo Sousa <[email protected]> --- drivers/gpu/drm/i915/display/intel_cx0_phy.c | 9 ++++++++- drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h | 2 ++ 2 files changed, 10 insertions(+), 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 996c3c6edd41..9202f0b9e8b3 100644 --- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c @@ -2144,6 +2144,7 @@ static void intel_c10pll_dump_hw_state(struct drm_i915_private *i915, static int intel_c20_compute_hdmi_tmds_pll(struct intel_crtc_state *crtc_state) { + struct intel_display *display = to_intel_display(crtc_state); struct intel_c20pll_state *pll_state = &crtc_state->dpll_hw_state.cx0pll.c20; u64 datarate; u64 mpll_tx_clk_div; @@ -2153,6 +2154,7 @@ static int intel_c20_compute_hdmi_tmds_pll(struct intel_crtc_state *crtc_state) u64 mpll_multiplier; u64 mpll_fracn_quot; u64 mpll_fracn_rem; + u16 tx_misc; u8 mpllb_ana_freq_vco; u8 mpll_div_multiplier; @@ -2172,6 +2174,11 @@ static int intel_c20_compute_hdmi_tmds_pll(struct intel_crtc_state *crtc_state) mpll_div_multiplier = min_t(u8, div64_u64((vco_freq * 16 + (datarate >> 1)), datarate), 255); + if (DISPLAY_VER(display) >= 20) + tx_misc = 0x5; + else + tx_misc = 0x0; + if (vco_freq <= DATARATE_3000000000) mpllb_ana_freq_vco = MPLLB_ANA_FREQ_VCO_3; else if (vco_freq <= DATARATE_3500000000) @@ -2183,7 +2190,7 @@ static int intel_c20_compute_hdmi_tmds_pll(struct intel_crtc_state *crtc_state) pll_state->clock = crtc_state->port_clock; pll_state->tx[0] = 0xbe88; - pll_state->tx[1] = 0x9800; + pll_state->tx[1] = 0x9800 | C20_PHY_TX_MISC(tx_misc); pll_state->tx[2] = 0x0000; pll_state->cmn[0] = 0x0500; pll_state->cmn[1] = 0x0005; diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h b/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h index ab3ae110b68f..fdce4152a7c9 100644 --- a/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h @@ -280,6 +280,8 @@ #define PHY_C20_B_TX_CNTX_CFG(i915, idx) \ ((_IS_XE2HPD_C20(i915) ? _XE2HPD_C20_B_TX_CNTX_CFG : _MTL_C20_B_TX_CNTX_CFG) - (idx)) #define C20_PHY_TX_RATE REG_GENMASK(2, 0) +#define C20_PHY_TX_MISC_MASK REG_GENMASK16(7, 0) +#define C20_PHY_TX_MISC(val) REG_FIELD_PREP16(C20_PHY_TX_MISC_MASK, (val)) #define PHY_C20_A_CMN_CNTX_CFG(i915, idx) \ ((_IS_XE2HPD_C20(i915) ? _XE2HPD_C20_A_CMN_CNTX_CFG : _MTL_C20_A_CMN_CNTX_CFG) - (idx)) -- 2.47.0
