drm/i915/display/adl_p: Implement Wa_22012278275

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>
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210616203158.118111-2-jose.souza@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index fde30f9..c8d5638 100644 (file)
--- 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 61fdd61..c7fd4ab 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4584,13 +4584,15 @@ 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)