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drm/i915/display: Increase AUX timeout for Type-C

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Type-C PHYs are taking longer than expected for Aux IO Power Enabling.
Workaround: Increase the timeout.

---v2
-change style on how we mention WA [Ankit]
-fix bat error by creating new func that is only called for aux power
well scenarios so we can avoid null pointer error as it is called
everywhere.

--v3
-Add non-default enable_timeout to power well descriptor which avoids
adding more platform checks [Imre]

--v4
-Remove Bspec link from top to bottom remove WA link from commit put it
on comment [Jani]
-enable_timeout in ms and add .fixed_enable_delay too [Imre]

--v5
-move power_wells instead of duplicating them [Imre]

Bspec: 55480

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230418131425.1285088-1-suraj.kandpal@intel.com
This commit is contained in:
Suraj Kandpal 2023-04-18 18:44:25 +05:30 committed by Animesh Manna
parent bddc18913b
commit 0602d59376
3 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/i915/display/intel_display_power_map.c
View File

@ -1387,6 +1387,11 @@ static const struct i915_power_well_desc xelpd_power_wells_main[] = {
I915_PW("AUX_C", &icl_pwdoms_aux_c, .hsw.idx = ICL_PW_CTL_IDX_AUX_C),
I915_PW("AUX_D", &icl_pwdoms_aux_d, .hsw.idx = XELPD_PW_CTL_IDX_AUX_D),
I915_PW("AUX_E", &icl_pwdoms_aux_e, .hsw.idx = XELPD_PW_CTL_IDX_AUX_E),
),
.ops = &icl_aux_power_well_ops,
.fixed_enable_delay = true,
}, {
.instances = &I915_PW_INSTANCES(
I915_PW("AUX_USBC1", &tgl_pwdoms_aux_usbc1, .hsw.idx = TGL_PW_CTL_IDX_AUX_TC1),
I915_PW("AUX_USBC2", &tgl_pwdoms_aux_usbc2, .hsw.idx = TGL_PW_CTL_IDX_AUX_TC2),
I915_PW("AUX_USBC3", &tgl_pwdoms_aux_usbc3, .hsw.idx = TGL_PW_CTL_IDX_AUX_TC3),
@ -1394,6 +1399,8 @@ static const struct i915_power_well_desc xelpd_power_wells_main[] = {
),
.ops = &icl_aux_power_well_ops,
.fixed_enable_delay = true,
/* WA_14017248603: adlp */
.enable_timeout = 500,
}, {
.instances = &I915_PW_INSTANCES(
I915_PW("AUX_TBT1", &icl_pwdoms_aux_tbt1, .hsw.idx = TGL_PW_CTL_IDX_AUX_TBT1),

3
drivers/gpu/drm/i915/display/intel_display_power_well.c
View File

@ -254,6 +254,7 @@ static void hsw_wait_for_power_well_enable(struct drm_i915_private *dev_priv,
{
const struct i915_power_well_regs *regs = power_well->desc->ops->regs;
int pw_idx = i915_power_well_instance(power_well)->hsw.idx;
int timeout = power_well->desc->enable_timeout ? : 1;
/*
* For some power wells we're not supposed to watch the status bit for
@ -267,7 +268,7 @@ static void hsw_wait_for_power_well_enable(struct drm_i915_private *dev_priv,
/* Timeout for PW1:10 us, AUX:not specified, other PWs:20 us. */
if (intel_de_wait_for_set(dev_priv, regs->driver,
HSW_PWR_WELL_CTL_STATE(pw_idx), 1)) {
HSW_PWR_WELL_CTL_STATE(pw_idx), timeout)) {
drm_dbg_kms(&dev_priv->drm, "%s power well enable timeout\n",
intel_power_well_name(power_well));

2
drivers/gpu/drm/i915/display/intel_display_power_well.h
View File

@ -110,6 +110,8 @@ struct i915_power_well_desc {
* Thunderbolt mode.
*/
u16 is_tc_tbt:1;
/* Enable timeout if greater than the default 1ms */
u16 enable_timeout;
};
struct i915_power_well {