[Intel-gfx] [PATCH 2/3] drm/i915/tgl: Drop Wa#1178

[Lucas De Marchi]

On Thu, Dec 12, 2019 at 02:37:34PM -0800, Matt Roper wrote:
>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.
>
>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 at intel.com>
>Cc: Swati Sharma <swati2.sharma at intel.com>
>Cc: Imre Deak <imre.deak at intel.com>
>Signed-off-by: Matt Roper <matthew.d.roper at intel.com>

Reviewed-by: Lucas De Marchi <lucas.demarchi at intel.com>

Lucas De Marchi

>---
> drivers/gpu/drm/i915/display/intel_display_power.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
>index cf34427cc840..52f2332e0ab8 100644
>--- 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,
>-- 
>2.23.0
>