This introduces the following function that can enable and disable psr
without intel_crtc_state when intel_psr is already enabled with current
intel_crtc_state information.
- intel_psr_pause(): Pause current PSR. it deactivates current psr state.
- intel_psr_resume(): Resume paused PSR without intel_crtc_state.
It activates paused psr state.
Cc: José Roberto de Souza <jose.souza@xxxxxxxxx>
Cc: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx>
Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@xxxxxxxxx>
---
.../drm/i915/display/intel_display_types.h | 1 +
drivers/gpu/drm/i915/display/intel_psr.c | 111 +++++++++++++++---
drivers/gpu/drm/i915/display/intel_psr.h | 2 +
3 files changed, 97 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index f69bd1caebbf..d49b79a0691a 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1454,6 +1454,7 @@ struct intel_psr {
u16 su_x_granularity;
u32 dc3co_exitline;
u32 dc3co_exit_delay;
+ bool paused;
struct delayed_work dc3co_work;
struct drm_dp_vsc_sdp vsc;
};
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index ea8f9598e6a3..533fc21f4352 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -957,26 +957,11 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp)
IGNORE_PSR2_HW_TRACKING : 0);
}
-static void intel_psr_enable_locked(struct intel_dp *intel_dp,
- const struct intel_crtc_state *crtc_state,
- const struct drm_connector_state *conn_state)
+static bool psr_interrupt_error_check(struct intel_dp *intel_dp)
{
- struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
- struct intel_encoder *encoder = &dig_port->base;
u32 val;
- drm_WARN_ON(&dev_priv->drm, intel_dp->psr.enabled);
-
- intel_dp->psr.psr2_enabled = crtc_state->has_psr2;
- intel_dp->psr.busy_frontbuffer_bits = 0;
- intel_dp->psr.pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe;
- intel_dp->psr.transcoder = crtc_state->cpu_transcoder;
- /* DC5/DC6 requires at least 6 idle frames */
- val = usecs_to_jiffies(intel_get_frame_time_us(crtc_state) * 6);
- intel_dp->psr.dc3co_exit_delay = val;
- intel_dp->psr.psr2_sel_fetch_enabled = crtc_state->enable_psr2_sel_fetch;
-
/*
* If a PSR error happened and the driver is reloaded, the EDP_PSR_IIR
* will still keep the error set even after the reset done in the
@@ -997,9 +982,36 @@ static void intel_psr_enable_locked(struct intel_dp *intel_dp,
intel_dp->psr.sink_not_reliable = true;
drm_dbg_kms(&dev_priv->drm,
"PSR interruption error set, not enabling PSR\n");
- return;
+ return false;
}
+ return true;
+}
+
+static void intel_psr_enable_locked(struct intel_dp *intel_dp,
+ const struct intel_crtc_state *crtc_state,
+ const struct drm_connector_state *conn_state)
+{
+ struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+ struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+ struct intel_encoder *encoder = &dig_port->base;
+ u32 val;
+
+ drm_WARN_ON(&dev_priv->drm, intel_dp->psr.enabled);
+
+ intel_dp->psr.psr2_enabled = crtc_state->has_psr2;
+ intel_dp->psr.busy_frontbuffer_bits = 0;
+ intel_dp->psr.pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe;
+ intel_dp->psr.transcoder = crtc_state->cpu_transcoder;
+ /* DC5/DC6 requires at least 6 idle frames */
+ val = usecs_to_jiffies(intel_get_frame_time_us(crtc_state) * 6);
+ intel_dp->psr.dc3co_exit_delay = val;
+ intel_dp->psr.psr2_sel_fetch_enabled = crtc_state->enable_psr2_sel_fetch;
+ intel_dp->psr.paused = false;
+
+ if (!psr_interrupt_error_check(intel_dp))
+ return;
+
drm_dbg_kms(&dev_priv->drm, "Enabling PSR%s\n",
intel_dp->psr.psr2_enabled ? "2" : "1");
intel_dp_compute_psr_vsc_sdp(intel_dp, crtc_state, conn_state,
@@ -1149,6 +1161,71 @@ void intel_psr_disable(struct intel_dp *intel_dp,
cancel_delayed_work_sync(&intel_dp->psr.dc3co_work);
}
+/**
+ * intel_psr_pause - Pause PSR
+ * @intel_dp: Intel DP
+ *
+ * This function need to be called after enabling psr.
+ */
+void intel_psr_pause(struct intel_dp *intel_dp)
+{
+ struct intel_psr *psr = &intel_dp->psr;
+
+ if (!CAN_PSR(intel_dp))
+ return;
+
+ mutex_lock(&psr->lock);
+
+ if (!psr->enabled || psr->paused) {
+ mutex_unlock(&psr->lock);
+ return;
+ }
+
+ intel_psr_disable_locked(intel_dp);
+ psr->paused = true;
+
+ mutex_unlock(&psr->lock);
+
+ cancel_work_sync(&psr->work);
+ cancel_delayed_work_sync(&psr->dc3co_work);
+}
+
+/**
+ * intel_psr_resume - Resume PSR
+ * @intel_dp: Intel DP
+ *
+ * This function need to be called after pausing psr.
+ */
+void intel_psr_resume(struct intel_dp *intel_dp)
+{
+ struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+ struct intel_psr *psr = &intel_dp->psr;
+
+ if (!CAN_PSR(intel_dp))
+ return;
+
+ mutex_lock(&psr->lock);
+
+ if (psr->enabled || !psr->paused)
+ goto unlock;
+
+ psr->paused = false;
+
+ if (!psr_interrupt_error_check(intel_dp))
+ goto unlock;
+
+ drm_dbg_kms(&dev_priv->drm, "Enabling PSR%s\n",
+ psr->psr2_enabled ? "2" : "1");
+ intel_psr_enable_sink(intel_dp);
+ intel_psr_enable_source(intel_dp);
+ intel_dp->psr.enabled = true;
+
+ intel_psr_activate(intel_dp);
+
+unlock:
+ mutex_unlock(&psr->lock);
+}
+
static void psr_force_hw_tracking_exit(struct intel_dp *intel_dp)
{
struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
diff --git a/drivers/gpu/drm/i915/display/intel_psr.h b/drivers/gpu/drm/i915/display/intel_psr.h
index 0491a49ffd50..8cc5e78fb1d2 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.h
+++ b/drivers/gpu/drm/i915/display/intel_psr.h
@@ -48,5 +48,7 @@ void intel_psr2_program_plane_sel_fetch(struct intel_plane *plane,
const struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state,
int color_plane);
+void intel_psr_pause(struct intel_dp *intel_dp);
+void intel_psr_resume(struct intel_dp *intel_dp);
#endif /* __INTEL_PSR_H__ */
--
2.30.1
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