In Lunarlake and onwards it is possible to generate "PSR frame change"
event using TRANS_PUSH mechanism. Implement function to enable this and
take PSR into account in intel_vrr_send_push.
v2: use intel_vrr_trans_push_enabled_set_clear instead of rmw
Signed-off-by: Jouni Högander <jouni.hogander@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_psr.c | 6 ++++
drivers/gpu/drm/i915/display/intel_vrr.c | 37 ++++++++++++++++++++++--
drivers/gpu/drm/i915/display/intel_vrr.h | 2 ++
3 files changed, 43 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 880ea845207f..a82d75f97c55 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -44,6 +44,7 @@
#include "intel_psr.h"
#include "intel_psr_regs.h"
#include "intel_snps_phy.h"
+#include "intel_vrr.h"
#include "skl_universal_plane.h"
/**
@@ -1934,6 +1935,9 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
intel_de_rmw(display, CLKGATE_DIS_MISC, 0,
CLKGATE_DIS_MISC_DMASC_GATING_DIS);
}
+
+ if (DISPLAY_VER(dev_priv) >= 20)
+ intel_vrr_psr_frame_change_enable(crtc_state);
}
static bool psr_interrupt_error_check(struct intel_dp *intel_dp)
@@ -2170,6 +2174,8 @@ void intel_psr_disable(struct intel_dp *intel_dp,
mutex_lock(&intel_dp->psr.lock);
+ if (DISPLAY_VER(display) >= 20)
+ intel_vrr_psr_frame_change_disable(old_crtc_state);
intel_psr_disable_locked(intel_dp);
mutex_unlock(&intel_dp->psr.lock);
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 328cc0a741bf..51cf1800ae87 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -324,7 +324,8 @@ void intel_vrr_send_push(const struct intel_crtc_state *crtc_state)
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
- if (!crtc_state->vrr.enable)
+ if (!crtc_state->vrr.enable && (DISPLAY_VER(display) < 20 ||
+ !crtc_state->has_psr))
return;
intel_de_write(display, TRANS_PUSH(display, cpu_transcoder),
@@ -336,7 +337,8 @@ bool intel_vrr_is_push_sent(const struct intel_crtc_state *crtc_state)
struct intel_display *display = to_intel_display(crtc_state);
enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
- if (!crtc_state->vrr.enable)
+ if (!crtc_state->vrr.enable && (DISPLAY_VER(display) < 20 ||
+ !crtc_state->has_psr))
return false;
return intel_de_read(display, TRANS_PUSH(display, cpu_transcoder)) & TRANS_PUSH_SEND;
@@ -381,6 +383,37 @@ void intel_vrr_enable(const struct intel_crtc_state *crtc_state)
}
}
+/**
+ * intel_vrr_psr_frame_change_enable - Enable PSR frame change mechanism
+ * @crtc_state: Intel crtc state
+ *
+ * This function is for PSR to enable PSR frame change mechanism which is more
+ * controlled way to generate frame change event.
+ */
+void intel_vrr_psr_frame_change_enable(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+
+ intel_vrr_trans_push_enabled_set_clear(crtc, cpu_transcoder, 0,
+ LNL_TRANS_PUSH_PSR_PR_EN);
+}
+
+/**
+ * intel_vrr_psr_frame_change_disable - Disable PSR frame change mechanism
+ * @crtc_state: Intel crtc state
+ *
+ * This function is for PSR to disable PSR frame change mechanism.
+ */
+void intel_vrr_psr_frame_change_disable(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+
+ intel_vrr_trans_push_enabled_set_clear(crtc, cpu_transcoder,
+ LNL_TRANS_PUSH_PSR_PR_EN, 0);
+}
+
void intel_vrr_disable(const struct intel_crtc_state *old_crtc_state)
{
struct intel_display *display = to_intel_display(old_crtc_state);
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.h b/drivers/gpu/drm/i915/display/intel_vrr.h
index b3b45c675020..b954a60e1aae 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.h
+++ b/drivers/gpu/drm/i915/display/intel_vrr.h
@@ -25,6 +25,8 @@ void intel_vrr_enable(const struct intel_crtc_state *crtc_state);
void intel_vrr_send_push(const struct intel_crtc_state *crtc_state);
bool intel_vrr_is_push_sent(const struct intel_crtc_state *crtc_state);
void intel_vrr_disable(const struct intel_crtc_state *old_crtc_state);
+void intel_vrr_psr_frame_change_enable(const struct intel_crtc_state *crtc_state);
+void intel_vrr_psr_frame_change_disable(const struct intel_crtc_state *crtc_state);
void intel_vrr_get_config(struct intel_crtc_state *crtc_state);
int intel_vrr_vmax_vblank_start(const struct intel_crtc_state *crtc_state);
int intel_vrr_vmin_vblank_start(const struct intel_crtc_state *crtc_state);
--
2.34.1
