[Intel-gfx] [PATCH 2/6] drm/i915/display/adl_p: Implement Wa_22012278275

[José Roberto de Souza]

The PSR2_CTL io buffer wake and fast wake values do not match
expected in pre production hardware, so here adding a table that
matches with HW to program it with values that HW expect.

Cc: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 29 +++++++++++++++++++++++-
 drivers/gpu/drm/i915/i915_reg.h          |  6 +++--
 2 files changed, 32 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index fde30f937504e..c8d56387d9233 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -542,7 +542,34 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
 	val |= EDP_PSR2_FRAME_BEFORE_SU(intel_dp->psr.sink_sync_latency + 1);
 	val |= intel_psr2_get_tp_time(intel_dp);
 
-	if (DISPLAY_VER(dev_priv) >= 12) {
+	/* Wa_22012278275:adlp */
+	if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_D1)) {
+		static const u8 map[] = {
+			2, /* 5 lines */
+			1, /* 6 lines */
+			0, /* 7 lines */
+			3, /* 8 lines */
+			6, /* 9 lines */
+			5, /* 10 lines */
+			4, /* 11 lines */
+			7, /* 12 lines */
+		};
+		/*
+		 * Still using the default IO_BUFFER_WAKE and FAST_WAKE, see
+		 * comments bellow for more information
+		 */
+		u32 tmp, lines = 7;
+
+		val |= TGL_EDP_PSR2_BLOCK_COUNT_NUM_2;
+
+		tmp = map[lines - TGL_EDP_PSR2_IO_BUFFER_WAKE_MIN_LINES];
+		tmp = tmp << TGL_EDP_PSR2_IO_BUFFER_WAKE_SHIFT;
+		val |= tmp;
+
+		tmp = map[lines - TGL_EDP_PSR2_FAST_WAKE_MIN_LINES];
+		tmp = tmp << TGL_EDP_PSR2_FAST_WAKE_MIN_SHIFT;
+		val |= tmp;
+	} else if (DISPLAY_VER(dev_priv) >= 12) {
 		/*
 		 * TODO: 7 lines of IO_BUFFER_WAKE and FAST_WAKE are default
 		 * values from BSpec. In order to setting an optimal power
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 955027799d1de..4a98e49c58812 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4596,13 +4596,15 @@ enum {
 #define   EDP_PSR2_IO_BUFFER_WAKE(lines)	((EDP_PSR2_IO_BUFFER_WAKE_MAX_LINES - (lines)) << 13)
 #define   EDP_PSR2_IO_BUFFER_WAKE_MASK		(3 << 13)
 #define   TGL_EDP_PSR2_IO_BUFFER_WAKE_MIN_LINES	5
-#define   TGL_EDP_PSR2_IO_BUFFER_WAKE(lines)	(((lines) - TGL_EDP_PSR2_IO_BUFFER_WAKE_MIN_LINES) << 13)
+#define   TGL_EDP_PSR2_IO_BUFFER_WAKE_SHIFT	13
+#define   TGL_EDP_PSR2_IO_BUFFER_WAKE(lines)	(((lines) - TGL_EDP_PSR2_IO_BUFFER_WAKE_MIN_LINES) << TGL_EDP_PSR2_IO_BUFFER_WAKE_SHIFT)
 #define   TGL_EDP_PSR2_IO_BUFFER_WAKE_MASK	(7 << 13)
 #define   EDP_PSR2_FAST_WAKE_MAX_LINES		8
 #define   EDP_PSR2_FAST_WAKE(lines)		((EDP_PSR2_FAST_WAKE_MAX_LINES - (lines)) << 11)
 #define   EDP_PSR2_FAST_WAKE_MASK		(3 << 11)
 #define   TGL_EDP_PSR2_FAST_WAKE_MIN_LINES	5
-#define   TGL_EDP_PSR2_FAST_WAKE(lines)		(((lines) - TGL_EDP_PSR2_FAST_WAKE_MIN_LINES) << 10)
+#define   TGL_EDP_PSR2_FAST_WAKE_MIN_SHIFT	10
+#define   TGL_EDP_PSR2_FAST_WAKE(lines)		(((lines) - TGL_EDP_PSR2_FAST_WAKE_MIN_LINES) << TGL_EDP_PSR2_FAST_WAKE_MIN_SHIFT)
 #define   TGL_EDP_PSR2_FAST_WAKE_MASK		(7 << 10)
 #define   EDP_PSR2_TP2_TIME_500us		(0 << 8)
 #define   EDP_PSR2_TP2_TIME_100us		(1 << 8)
-- 
2.32.0