The dispcnlunit1_cp_xosc_clk should be de-asserted in display off
and only asserted in display on. But during observation it found
clk remains active in display OFF. As workaround, Display driver
shall execute set-reset sequence at the end of the Initialize
Sequence.
Wa_14020225554
--v2:
- Update workaround number in commit message.
Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_display_power.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index e288a1b21d7e..0d8875fa5ef2 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -1704,6 +1704,14 @@ static void icl_display_core_init(struct drm_i915_private *dev_priv,
/* Wa_14011503030:xelpd */
if (DISPLAY_VER(dev_priv) == 13)
intel_de_write(dev_priv, XELPD_DISPLAY_ERR_FATAL_MASK, ~0);
+
+ /* Wa_14020225554 */
+ if (DISPLAY_VER(dev_priv) == 20) {
+ intel_de_write(dev_priv, SOUTH_DSPCLK_GATE_D,
+ PCH_GMBUSUNIT_CLOCK_GATE_DISABLE);
+ intel_de_rmw(dev_priv, SOUTH_DSPCLK_GATE_D,
+ PCH_GMBUSUNIT_CLOCK_GATE_DISABLE, 0);
+ }
}
static void icl_display_core_uninit(struct drm_i915_private *dev_priv)
--
2.45.2
