From: Anusha Srivatsa <[email protected]> Add step 9 from initialize display sequence.
v2: Commit subject improved Bpsec: 49189 Signed-off-by: Anusha Srivatsa <[email protected]> Signed-off-by: Balasubramani Vivekanandan <[email protected]> Reviewed-by: Matt Roper <[email protected]> Signed-off-by: Radhakrishna Sripada <[email protected]> --- drivers/gpu/drm/i915/display/intel_display_power.c | 4 ++++ drivers/gpu/drm/i915/i915_reg.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c index 03dc7edcc443..a860d88a65da 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.c +++ b/drivers/gpu/drm/i915/display/intel_display_power.c @@ -1688,6 +1688,10 @@ static void icl_display_core_init(struct drm_i915_private *dev_priv, if (IS_DG2(dev_priv)) intel_snps_phy_wait_for_calibration(dev_priv); + /* 9. XE2_HPD: Program CHICKEN_MISC_2 before any cursor or planes are enabled */ + if (DISPLAY_VER_FULL(dev_priv) == IP_VER(14, 1)) + intel_de_rmw(dev_priv, CHICKEN_MISC_2, BMG_DARB_HALF_BLK_END_BURST, 1); + if (resume) intel_dmc_load_program(dev_priv); diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index beed2b97d4b2..962c1b307bde 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3792,6 +3792,7 @@ #define CHICKEN_MISC_2 _MMIO(0x42084) #define CHICKEN_MISC_DISABLE_DPT REG_BIT(30) /* adl,dg2 */ +#define BMG_DARB_HALF_BLK_END_BURST REG_BIT(27) #define KBL_ARB_FILL_SPARE_14 REG_BIT(14) #define KBL_ARB_FILL_SPARE_13 REG_BIT(13) #define GLK_CL2_PWR_DOWN REG_BIT(12) -- 2.34.1
