Add new interface for checking possible PSR/PR mode change. We need this
information to decide if DSB can be used.
Signed-off-by: Jouni Högander <jouni.hogan...@intel.com>
---
drivers/gpu/drm/i915/display/intel_psr.c | 20 ++++++++++++++++++++
drivers/gpu/drm/i915/display/intel_psr.h | 2 ++
2 files changed, 22 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
b/drivers/gpu/drm/i915/display/intel_psr.c
index 1e99329b70a1..90e36e34e0c7 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -225,6 +225,26 @@ bool intel_psr_needs_aux_io_power(struct intel_encoder
*encoder,
intel_encoder_can_psr(encoder);
}
+/**
+ * intel_psr_is_psr_mode_changing - Check if PSR/PR mode is changing
+ * @old_crtc_state: pointer to old intel_crtc_state
+ * @new_crtc_state: pointer to new intel_crtc_state
+ *
+ * This can be used to figure out if PSR/PR mode is changing between old and
new
+ * crtc state.
+ *
+ * Returns true if mode is changing, false if mode is not changing.
+ */
+bool intel_psr_is_psr_mode_changing(const struct intel_crtc_state
*old_crtc_state,
+ const struct intel_crtc_state
*new_crtc_state)
+{
+ return old_crtc_state->has_psr != new_crtc_state->has_psr ||
+ old_crtc_state->has_sel_update !=
new_crtc_state->has_sel_update ||
+ old_crtc_state->has_panel_replay !=
new_crtc_state->has_panel_replay ||
+ old_crtc_state->enable_psr2_su_region_et !=
+ new_crtc_state->enable_psr2_su_region_et;
+}
+
static bool psr_global_enabled(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
diff --git a/drivers/gpu/drm/i915/display/intel_psr.h
b/drivers/gpu/drm/i915/display/intel_psr.h
index fc807817863e..cc6267e87933 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.h
+++ b/drivers/gpu/drm/i915/display/intel_psr.h
@@ -26,6 +26,8 @@ struct intel_plane_state;
(intel_dp)->psr.source_panel_replay_support)
bool intel_encoder_can_psr(struct intel_encoder *encoder);
+bool intel_psr_is_psr_mode_changing(const struct intel_crtc_state
*old_crtc_state,
+ const struct intel_crtc_state
*new_crtc_state);
bool intel_psr_needs_aux_io_power(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state);
void intel_psr_init_dpcd(struct intel_dp *intel_dp);
--
2.43.0
