drm/i915: Parse VBT PSR block.
PSR (aka SRD) block is defined at VBT and currently being used.
Mainly/At-least to configure the amount of idle_frames require to get
back to PSR Entry.
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index a4bd90f..3f17825 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -664,6 +664,50 @@
}
}
+static void
+parse_psr(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
+{
+ struct bdb_psr *psr;
+ struct psr_table *psr_table;
+
+ psr = find_section(bdb, BDB_PSR);
+ if (!psr) {
+ DRM_DEBUG_KMS("No PSR BDB found.\n");
+ return;
+ }
+
+ psr_table = &psr->psr_table[panel_type];
+
+ dev_priv->vbt.psr.full_link = psr_table->full_link;
+ dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
+
+ /* Allowed VBT values goes from 0 to 15 */
+ dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
+ psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
+
+ switch (psr_table->lines_to_wait) {
+ case 0:
+ dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
+ break;
+ case 1:
+ dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
+ break;
+ case 2:
+ dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
+ break;
+ case 3:
+ dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
+ break;
+ default:
+ DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
+ psr_table->lines_to_wait);
+ break;
+ }
+
+ dev_priv->vbt.psr.tp1_wakeup_time = psr_table->tp1_wakeup_time;
+ dev_priv->vbt.psr.tp2_tp3_wakeup_time = psr_table->tp2_tp3_wakeup_time;
+}
+
static u8 *goto_next_sequence(u8 *data, int *size)
{
u16 len;
@@ -1241,6 +1285,7 @@
parse_device_mapping(dev_priv, bdb);
parse_driver_features(dev_priv, bdb);
parse_edp(dev_priv, bdb);
+ parse_psr(dev_priv, bdb);
parse_mipi(dev_priv, bdb);
parse_ddi_ports(dev_priv, bdb);