diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_cx0_phy.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_cx0_phy.c | 41 |
1 files changed, 39 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c index a82b93cbc81d..ed8e640b96b0 100644 --- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c @@ -8,8 +8,8 @@ #include <drm/drm_print.h> -#include "i915_reg.h" #include "i915_utils.h" +#include "intel_alpm.h" #include "intel_cx0_phy.h" #include "intel_cx0_phy_regs.h" #include "intel_ddi.h" @@ -39,7 +39,13 @@ bool intel_encoder_is_c10phy(struct intel_encoder *encoder) struct intel_display *display = to_intel_display(encoder); enum phy phy = intel_encoder_to_phy(encoder); - if (display->platform.pantherlake && phy == PHY_A) + /* PTL doesn't have a PHY connected to PORT B; as such, + * there will never be a case where PTL uses PHY B. + * WCL uses PORT A and B with the C10 PHY. + * Reusing the condition for WCL and extending it for PORT B + * should not cause any issues for PTL. + */ + if (display->platform.pantherlake && phy < PHY_C) return true; if ((display->platform.lunarlake || display->platform.meteorlake) && phy < PHY_C) @@ -3224,6 +3230,37 @@ void intel_mtl_pll_enable(struct intel_encoder *encoder, intel_cx0pll_enable(encoder, crtc_state); } +/* + * According to HAS we need to enable MAC Transmitting LFPS in the "PHY Common + * Control 0" PIPE register in case of AUX Less ALPM is going to be used. This + * function is doing that and is called by link retrain sequence. + */ +void intel_lnl_mac_transmit_lfps(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state) +{ + struct intel_display *display = to_intel_display(encoder); + u8 owned_lane_mask = intel_cx0_get_owned_lane_mask(encoder); + bool enable = intel_alpm_is_alpm_aux_less(enc_to_intel_dp(encoder), + crtc_state); + int i; + + if (DISPLAY_VER(display) < 20) + return; + + 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(encoder, lane_mask, PHY_CMN1_CONTROL(tx, 0), + CONTROL0_MAC_TRANSMIT_LFPS, + enable ? CONTROL0_MAC_TRANSMIT_LFPS : 0, + MB_WRITE_COMMITTED); + } +} + static u8 cx0_power_control_disable_val(struct intel_encoder *encoder) { struct intel_display *display = to_intel_display(encoder); |