[OEM-5.14/Jammy][PATCH 1/1] UBUNTU: SAUCE: Revert "drm/i915/display: Remove check for low voltage sku for max dp source rate"

[Aaron Ma]

BugLink: https://bugs.launchpad.net/bugs/1980621

This reverts commit ed3fc6452562128cdd3c6f9ce8dc24ca4651d1cf.

This commit was claimed to backport
commit 73867c8709b5 ("drm/i915/display: Remove check for low voltage sku for max dp source rate")
that is reverted by upstream:
commit c7b28f52f406 ("drm/i915/display: Re-add check for low voltage sku for max dp source rate")

But it's not. So revert it instead of upstream commit.
It causes blanck screen on ThinkPad ADL platform.

Signed-off-by: Aaron Ma <aaron.ma at canonical.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 45ce9846ab973..631cf7d4323c8 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -283,10 +283,7 @@ intel_dp_set_source_rates(struct intel_dp *intel_dp)
 	if (DISPLAY_VER(dev_priv) >= 11) {
 		source_rates = icl_rates;
 		size = ARRAY_SIZE(icl_rates);
-		if (IS_ALDERLAKE_P(dev_priv) || IS_ALDERLAKE_S(dev_priv) ||
-			 IS_DG1(dev_priv) || IS_ROCKETLAKE(dev_priv))
-			max_rate = 810000;
-		else if (IS_JSL_EHL(dev_priv))
+		if (IS_JSL_EHL(dev_priv))
 			max_rate = ehl_max_source_rate(intel_dp);
 		else
 			max_rate = icl_max_source_rate(intel_dp);
-- 
2.34.1