[Intel-gfx] [PATCH] drm/i915/display: Allow PSR2 selective fetch to be enabled at run-time

["José Roberto de Souza" <jose.souza@intel.com>]

Right now CI is blacklisting module reload, so we need to be able to
enable PSR2 selective fetch in run time to test this feature before
enable it by default.
Changes in IGT will also be needed.

Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_types.h | 1 +
 drivers/gpu/drm/i915/display/intel_psr.c           | 6 ++++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 307ff4b771f4..d78530abfef2 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1424,6 +1424,7 @@ struct intel_psr {
 #define I915_PSR_DEBUG_DISABLE		0x01
 #define I915_PSR_DEBUG_ENABLE		0x02
 #define I915_PSR_DEBUG_FORCE_PSR1	0x03
+#define I915_PSR_DEBUG_ENABLE_SEL_FETCH	0x4
 #define I915_PSR_DEBUG_IRQ		0x10
 
 	u32 debug;
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 28423356d53b..eabb9a0c2164 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -683,7 +683,8 @@ static bool intel_psr2_sel_fetch_config_valid(struct intel_dp *intel_dp,
 	struct intel_plane *plane;
 	int i;
 
-	if (!dev_priv->params.enable_psr2_sel_fetch) {
+	if (!dev_priv->params.enable_psr2_sel_fetch &&
+	    intel_dp->psr.debug != I915_PSR_DEBUG_ENABLE_SEL_FETCH) {
 		drm_dbg_kms(&dev_priv->drm,
 			    "PSR2 sel fetch not enabled, disabled by parameter\n");
 		return false;
@@ -1447,7 +1448,8 @@ void intel_psr_update(struct intel_dp *intel_dp,
 	enable = crtc_state->has_psr;
 	psr2_enable = crtc_state->has_psr2;
 
-	if (enable == psr->enabled && psr2_enable == psr->psr2_enabled) {
+	if (enable == psr->enabled && psr2_enable == psr->psr2_enabled &&
+	    crtc_state->enable_psr2_sel_fetch == psr->psr2_sel_fetch_enabled) {
 		/* Force a PSR exit when enabling CRC to avoid CRC timeouts */
 		if (crtc_state->crc_enabled && psr->enabled)
 			psr_force_hw_tracking_exit(intel_dp);
-- 
2.30.0

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