diff options
| author | Imre Deak <imre.deak@intel.com> | 2024-07-22 19:54:57 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2024-07-31 18:45:59 +0300 |
| commit | 96c468c366dacc0e41e08ac53e20a5025f6ba967 (patch) | |
| tree | 4e604a94b92fe1d859e1710566c331273a6dd2e6 | |
| parent | 634e1804242b0d5d64031199236fb3f337b5af3d (diff) | |
| download | linux-96c468c366dacc0e41e08ac53e20a5025f6ba967.tar.gz linux-96c468c366dacc0e41e08ac53e20a5025f6ba967.tar.bz2 linux-96c468c366dacc0e41e08ac53e20a5025f6ba967.zip | |
drm/i915/dp: Add helpers to set link training mode, BW parameters
Add helpers to set the link mode and BW parameters. These are required
by a follow-up patch setting the parameters for a disabled link.
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240722165503.2084999-9-imre.deak@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_link_training.c | 34 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_link_training.h | 6 |
2 files changed, 29 insertions, 11 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c index 57536ae200b7..214c8858b8a9 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c @@ -21,6 +21,8 @@ * IN THE SOFTWARE. */ +#include <drm/display/drm_dp_helper.h> + #include "i915_drv.h" #include "intel_display_types.h" #include "intel_dp.h" @@ -703,26 +705,28 @@ static bool intel_dp_link_max_vswing_reached(struct intel_dp *intel_dp, return true; } -static void -intel_dp_update_downspread_ctrl(struct intel_dp *intel_dp, - const struct intel_crtc_state *crtc_state) +void intel_dp_link_training_set_mode(struct intel_dp *intel_dp, int link_rate, bool is_vrr) { u8 link_config[2]; - link_config[0] = crtc_state->vrr.flipline ? DP_MSA_TIMING_PAR_IGNORE_EN : 0; - link_config[1] = intel_dp_is_uhbr(crtc_state) ? + link_config[0] = is_vrr ? DP_MSA_TIMING_PAR_IGNORE_EN : 0; + link_config[1] = drm_dp_is_uhbr_rate(link_rate) ? DP_SET_ANSI_128B132B : DP_SET_ANSI_8B10B; drm_dp_dpcd_write(&intel_dp->aux, DP_DOWNSPREAD_CTRL, link_config, 2); } -static void -intel_dp_update_link_bw_set(struct intel_dp *intel_dp, - const struct intel_crtc_state *crtc_state, - u8 link_bw, u8 rate_select) +static void intel_dp_update_downspread_ctrl(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state) { - u8 lane_count = crtc_state->lane_count; + intel_dp_link_training_set_mode(intel_dp, + crtc_state->port_clock, crtc_state->vrr.flipline); +} - if (crtc_state->enhanced_framing) +void intel_dp_link_training_set_bw(struct intel_dp *intel_dp, + int link_bw, int rate_select, int lane_count, + bool enhanced_framing) +{ + if (enhanced_framing) lane_count |= DP_LANE_COUNT_ENHANCED_FRAME_EN; if (link_bw) { @@ -746,6 +750,14 @@ intel_dp_update_link_bw_set(struct intel_dp *intel_dp, } } +static void intel_dp_update_link_bw_set(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state, + u8 link_bw, u8 rate_select) +{ + intel_dp_link_training_set_bw(intel_dp, link_bw, rate_select, crtc_state->lane_count, + crtc_state->enhanced_framing); +} + /* * Prepare link training by configuring the link parameters. On DDI platforms * also enable the port here. diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.h b/drivers/gpu/drm/i915/display/intel_dp_link_training.h index 42e7fc6cb171..2066b9146762 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.h +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.h @@ -16,6 +16,12 @@ struct intel_dp; int intel_dp_read_dprx_caps(struct intel_dp *intel_dp, u8 dpcd[DP_RECEIVER_CAP_SIZE]); int intel_dp_init_lttpr_and_dprx_caps(struct intel_dp *intel_dp); +void intel_dp_link_training_set_mode(struct intel_dp *intel_dp, + int link_rate, bool is_vrr); +void intel_dp_link_training_set_bw(struct intel_dp *intel_dp, + int link_bw, int rate_select, int lane_count, + bool enhanced_framing); + void intel_dp_get_adjust_train(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state, enum drm_dp_phy dp_phy, |