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

José Roberto de Souza
2021-06-16T20:28:19Z

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@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@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