drm/i915/tgl: Drop Wa#1178

The TGL workaround database no longer shows Wa #1178 (or anything
similar under different workaround names/numbers) so we should be able
to drop it.  In fact Swati just discovered that applying this workaround
is the root cause of some power well enable failures we've been seeing
in CI (gitlab issue 498).

Once we stop applying this WA, TGL no longer utilizes any of the special
handling provided by icl_combo_phy_aux_power_well_ops so we can just
drop back to using the standard hsw-style power well ops instead.

v3: Drop now-unused _TGL_AUX_ANAOVRD1_C definition too.  (Lucas)

Closes: https://gitlab.freedesktop.org/drm/intel/issues/498
Fixes: deea06b47574 ("drm/i915/tgl: apply Display WA #1178 to fix type C dongles")
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Swati Sharma <swati2.sharma@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191213001511.678070-3-matthew.d.roper@intel.com
(cherry picked from commit ab3402581d0fa58e63e36875995f43ab02b4d0a0)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index fc1683b..12ba747 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -3977,7 +3977,7 @@ static const struct i915_power_well_desc tgl_power_wells[] = {
        {
                .name = "AUX A",
                .domains = TGL_AUX_A_IO_POWER_DOMAINS,
-               .ops = &icl_combo_phy_aux_power_well_ops,
+               .ops = &hsw_power_well_ops,
                .id = DISP_PW_ID_NONE,
                {
                        .hsw.regs = &icl_aux_power_well_regs,
@@ -3987,7 +3987,7 @@ static const struct i915_power_well_desc tgl_power_wells[] = {
        {
                .name = "AUX B",
                .domains = TGL_AUX_B_IO_POWER_DOMAINS,
-               .ops = &icl_combo_phy_aux_power_well_ops,
+               .ops = &hsw_power_well_ops,
                .id = DISP_PW_ID_NONE,
                {
                        .hsw.regs = &icl_aux_power_well_regs,
@@ -3997,7 +3997,7 @@ static const struct i915_power_well_desc tgl_power_wells[] = {
        {
                .name = "AUX C",
                .domains = TGL_AUX_C_IO_POWER_DOMAINS,
-               .ops = &icl_combo_phy_aux_power_well_ops,
+               .ops = &hsw_power_well_ops,
                .id = DISP_PW_ID_NONE,
                {
                        .hsw.regs = &icl_aux_power_well_regs,

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 9599b99..4fd3d76 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -9405,11 +9405,9 @@ enum skl_power_gate {
 #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 _TGL_AUX_ANAOVRD1_C            0x160398
 #define ICL_AUX_ANAOVRD1(pw_idx)       _MMIO(_PICK(_ICL_AUX_REG_IDX(pw_idx), \
                                                    _ICL_AUX_ANAOVRD1_A, \
-                                                   _ICL_AUX_ANAOVRD1_B, \
-                                                   _TGL_AUX_ANAOVRD1_C))
+                                                   _ICL_AUX_ANAOVRD1_B))
 #define   ICL_AUX_ANAOVRD1_LDO_BYPASS  (1 << 7)
 #define   ICL_AUX_ANAOVRD1_ENABLE      (1 << 0)