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drm/i915: Implement WA 14011294188

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Although the WA description targets the platforms it is a workaround
for the affected PCHs, that is why it is being checked.

v2: excluding DG1 fake PCH from WA

BSpec: 52890
BSpec: 53273
BSpec: 52888
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200727164729.28836-1-jose.souza@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
José Roberto de Souza 2020-07-27 09:47:29 -07:00 committed by Rodrigo Vivi
parent 90e1329296
commit c746063ab1
2 changed files with 7 additions and 0 deletions
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6
drivers/gpu/drm/i915/display/intel_display_power.c
View File

@ -5302,6 +5302,12 @@ static void icl_display_core_init(struct drm_i915_private *dev_priv,
gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
/* Wa_14011294188:ehl,jsl,tgl,rkl */
if (INTEL_PCH_TYPE(dev_priv) >= PCH_JSP &&
INTEL_PCH_TYPE(dev_priv) < PCH_DG1)
intel_de_rmw(dev_priv, SOUTH_DSPCLK_GATE_D, 0,
PCH_DPMGUNIT_CLOCK_GATE_DISABLE);
/* 1. Enable PCH reset handshake. */
intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));

1
drivers/gpu/drm/i915/i915_reg.h
View File

@ -8730,6 +8730,7 @@ enum {
#define PCH_GMBUSUNIT_CLOCK_GATE_DISABLE (1 << 31)
#define PCH_DPLUNIT_CLOCK_GATE_DISABLE (1 << 30)
#define PCH_DPLSUNIT_CLOCK_GATE_DISABLE (1 << 29)
#define PCH_DPMGUNIT_CLOCK_GATE_DISABLE (1 << 15)
#define PCH_CPUNIT_CLOCK_GATE_DISABLE (1 << 14)
#define CNP_PWM_CGE_GATING_DISABLE (1 << 13)
#define PCH_LP_PARTITION_LEVEL_DISABLE (1 << 12)