diff options
| author | Jani Nikula <jani.nikula@intel.com> | 2025-01-07 11:54:14 +0200 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2025-01-07 18:44:06 +0200 |
| commit | aedeed4af6fdd23426a6cec09c3e5872003e4a07 (patch) | |
| tree | dcd9b3ec567c9dec65d75936732a1d37e36b9813 /drivers/gpu/drm/i915 | |
| parent | 01708578ae83d16ce9a89fc5d412a135481d1e62 (diff) | |
drm/i915/ddi: write payload for 128b/132b SST
Write the payload allocation table for 128b/132b SST. Use VCPID 1 and
start from slot 0, with dp_m_n.tu slots.
This is preparation for enabling 128b/132b SST. This path is not
reachable yet. Indeed, we don't yet compute TU for 128b/132b SST.
v2: Handle drm_dp_dpcd_write_payload() failures (Imre)
v3: Include drm_dp_helper.h (kernel test robot)
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250107095414.1244286-1-jani.nikula@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_ddi.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 44f9bde2cdcc..f8e111d8c3a5 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -28,6 +28,7 @@ #include <linux/iopoll.h> #include <linux/string_helpers.h> +#include <drm/display/drm_dp_helper.h> #include <drm/display/drm_scdc_helper.h> #include <drm/drm_privacy_screen_consumer.h> @@ -2574,6 +2575,7 @@ static void mtl_ddi_pre_enable_dp(struct intel_atomic_state *state, { struct intel_dp *intel_dp = enc_to_intel_dp(encoder); bool is_mst = intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST); + int ret; intel_dp_set_link_params(intel_dp, crtc_state->port_clock, @@ -2668,6 +2670,14 @@ static void mtl_ddi_pre_enable_dp(struct intel_atomic_state *state, /* 6.o Configure and enable FEC if needed */ intel_ddi_enable_fec(encoder, crtc_state); + /* 7.a 128b/132b SST. */ + if (!is_mst && intel_dp_is_uhbr(crtc_state)) { + /* VCPID 1, start slot 0 for 128b/132b, tu slots */ + ret = drm_dp_dpcd_write_payload(&intel_dp->aux, 1, 0, crtc_state->dp_m_n.tu); + if (ret < 0) + intel_dp_queue_modeset_retry_for_link(state, encoder, crtc_state); + } + if (!is_mst) intel_dsc_dp_pps_write(encoder, crtc_state); } @@ -2681,6 +2691,7 @@ static void tgl_ddi_pre_enable_dp(struct intel_atomic_state *state, struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_digital_port *dig_port = enc_to_dig_port(encoder); bool is_mst = intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST); + int ret; intel_dp_set_link_params(intel_dp, crtc_state->port_clock, @@ -2807,6 +2818,13 @@ static void tgl_ddi_pre_enable_dp(struct intel_atomic_state *state, /* 7.l Configure and enable FEC if needed */ intel_ddi_enable_fec(encoder, crtc_state); + if (!is_mst && intel_dp_is_uhbr(crtc_state)) { + /* VCPID 1, start slot 0 for 128b/132b, tu slots */ + ret = drm_dp_dpcd_write_payload(&intel_dp->aux, 1, 0, crtc_state->dp_m_n.tu); + if (ret < 0) + intel_dp_queue_modeset_retry_for_link(state, encoder, crtc_state); + } + if (!is_mst) intel_dsc_dp_pps_write(encoder, crtc_state); } |