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drm/i915/icl: apply Display WA #1178 to fix type C dongles

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Display WA #1178 is meant to fix Aux channel voltage swing too low with
some type C dongles. It applies to external ports on combo phy. On
Icelake this is port A and B when those are not eDP.

v2: follow the spec to the letter: include Aux A and just check if it's
    not eDP instead of checking only for Aux B.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181012215758.25342-1-lucas.demarchi@intel.com
This commit is contained in:
Lucas De Marchi 2018-10-12 14:57:58 -07:00 committed by Rodrigo Vivi
parent b0b62d845e
commit ffd7e32d95
2 changed files with 18 additions and 0 deletions
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9
drivers/gpu/drm/i915/i915_reg.h
View File

@ -8934,6 +8934,15 @@ enum skl_power_gate {
#define CNL_AUX_ANAOVRD1_ENABLE (1 << 16)
#define CNL_AUX_ANAOVRD1_LDO_BYPASS (1 << 23)
#define _ICL_AUX_REG_IDX(pw_idx) ((pw_idx) - ICL_PW_CTL_IDX_AUX_A)
#define _ICL_AUX_ANAOVRD1_A 0x162398
#define _ICL_AUX_ANAOVRD1_B 0x6C398
#define ICL_AUX_ANAOVRD1(pw_idx) _MMIO(_PICK(_ICL_AUX_REG_IDX(pw_idx), \
_ICL_AUX_ANAOVRD1_A, \
_ICL_AUX_ANAOVRD1_B))
#define ICL_AUX_ANAOVRD1_LDO_BYPASS (1 << 7)
#define ICL_AUX_ANAOVRD1_ENABLE (1 << 0)
/* HDCP Key Registers */
#define HDCP_KEY_CONF _MMIO(0x66c00)
#define HDCP_AKSV_SEND_TRIGGER BIT(31)

9
drivers/gpu/drm/i915/intel_runtime_pm.c
View File

@ -436,6 +436,15 @@ icl_combo_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
I915_WRITE(ICL_PORT_CL_DW12(port), val | ICL_LANE_ENABLE_AUX);
hsw_wait_for_power_well_enable(dev_priv, power_well);
/* Display WA #1178: icl */
if (IS_ICELAKE(dev_priv) &&
pw_idx >= ICL_PW_CTL_IDX_AUX_A && pw_idx <= ICL_PW_CTL_IDX_AUX_B &&
!intel_bios_is_port_edp(dev_priv, port)) {
val = I915_READ(ICL_AUX_ANAOVRD1(pw_idx));
val |= ICL_AUX_ANAOVRD1_ENABLE | ICL_AUX_ANAOVRD1_LDO_BYPASS;
I915_WRITE(ICL_AUX_ANAOVRD1(pw_idx), val);
}
}
static void