From: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx> Add step 9 from initialize display sequence. Bpsec: 49189 Signed-off-by: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx> Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@xxxxxxxxx> --- 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 6fd4fa52253a..bf9685acf75a 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.c +++ b/drivers/gpu/drm/i915/display/intel_display_power.c @@ -1694,6 +1694,10 @@ 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 58f3e4bfe254..875d76fb8cd0 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4548,6 +4548,7 @@ #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) -- 2.25.1
