Link Off Between Active Frames, is a new feature for eDP
that allows the panel to go to lower power state after
transmission of data. This is a feature on top of ALPM, AS SDP.
Add compute config during atomic-check phase.
Signed-off-by: Animesh Manna <animesh.manna@xxxxxxxxx>
---
.../drm/i915/display/intel_display_types.h | 3 ++
drivers/gpu/drm/i915/display/intel_dp.c | 1 +
drivers/gpu/drm/i915/display/intel_psr.c | 45 +++++++++++++++++++
drivers/gpu/drm/i915/display/intel_psr.h | 3 ++
4 files changed, 52 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index d473d8dca90a..4d2161eeb686 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1851,6 +1851,9 @@ struct intel_dp {
u8 silence_period_sym_clocks;
u8 lfps_half_cycle_num_of_syms;
} alpm_parameters;
+
+ /* LOBF flags*/
+ bool lobf_supported;
};
enum lspcon_vendor {
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 8304ef912767..e34b70d88b9a 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2979,6 +2979,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
intel_vrr_compute_config(pipe_config, conn_state);
intel_dp_compute_as_sdp(intel_dp, pipe_config, conn_state);
intel_psr_compute_config(intel_dp, pipe_config, conn_state);
+ intel_psr_lobf_compute_config(intel_dp, pipe_config, conn_state);
intel_dp_drrs_compute_config(connector, pipe_config, link_bpp_x16);
intel_dp_compute_vsc_sdp(intel_dp, pipe_config, conn_state);
intel_dp_compute_hdr_metadata_infoframe_sdp(intel_dp, pipe_config, conn_state);
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 4adcddba69c1..c08bffc2921a 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -436,6 +436,16 @@ static bool intel_dp_get_alpm_status(struct intel_dp *intel_dp)
return alpm_caps & DP_ALPM_CAP;
}
+static bool intel_dp_get_aux_less_alpm_status(struct intel_dp *intel_dp)
+{
+ u8 alpm_caps = 0;
+
+ if (drm_dp_dpcd_readb(&intel_dp->aux, DP_RECEIVER_ALPM_CAP,
+ &alpm_caps) != 1)
+ return false;
+ return alpm_caps & DP_ALPM_AUX_LESS_CAP;
+}
+
static u8 intel_dp_get_sink_sync_latency(struct intel_dp *intel_dp)
{
struct drm_i915_private *i915 = dp_to_i915(intel_dp);
@@ -1569,6 +1579,41 @@ void intel_psr_compute_config(struct intel_dp *intel_dp,
crtc_state->has_psr2 = intel_psr2_config_valid(intel_dp, crtc_state);
}
+void intel_psr_lobf_compute_config(struct intel_dp *intel_dp,
+ struct intel_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
+ int waketime_in_lines, first_sdp_position;
+ int context_latency, guardband;
+ bool auxless_alpm;
+
+ intel_dp->lobf_supported = false;
+
+ if (!intel_dp_is_edp(intel_dp))
+ return;
+
+ if (!intel_dp_as_sdp_supported(intel_dp))
+ return;
+
+ if (CAN_PSR(intel_dp) || CAN_PANEL_REPLAY(intel_dp))
+ return;
+
+ if (_compute_alpm_params(intel_dp, crtc_state)) {
+ context_latency = adjusted_mode->crtc_vblank_start - adjusted_mode->crtc_vdisplay;
+ guardband = adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vdisplay - context_latency;
+ first_sdp_position = adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vsync_start;
+ auxless_alpm = intel_dp_get_aux_less_alpm_status(intel_dp);
+ if (auxless_alpm)
+ waketime_in_lines = intel_dp->alpm_parameters.io_wake_lines;
+ else
+ waketime_in_lines = intel_dp->alpm_parameters.aux_less_wake_lines;
+
+ if ((context_latency + guardband) > (first_sdp_position + waketime_in_lines))
+ intel_dp->lobf_supported = true;
+ }
+}
+
void intel_psr_get_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config)
{
diff --git a/drivers/gpu/drm/i915/display/intel_psr.h b/drivers/gpu/drm/i915/display/intel_psr.h
index cde781df84d5..4bb77295288f 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.h
+++ b/drivers/gpu/drm/i915/display/intel_psr.h
@@ -40,6 +40,9 @@ void intel_psr_init(struct intel_dp *intel_dp);
void intel_psr_compute_config(struct intel_dp *intel_dp,
struct intel_crtc_state *crtc_state,
struct drm_connector_state *conn_state);
+void intel_psr_lobf_compute_config(struct intel_dp *intel_dp,
+ struct intel_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state);
void intel_psr_get_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config);
void intel_psr_irq_handler(struct intel_dp *intel_dp, u32 psr_iir);
--
2.29.0
