[PATCH 17/17] drm/i915/display: Extend the max dotclock limit to WCL

[Ankit Nautiyal <ankit.k.nautiyal@intel.com>]

From: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>

Add upper limit check for pixel clock for WCL.

For prior platforms though the bspec mentions the dotclock limits, however
these are intentionally not enforced to avoid regressions, unless real
issues are observed.

BSpec: 49199, 68912
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 9cfeb5530fd8..bd4219467e0e 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -8006,8 +8006,16 @@ int intel_max_uncompressed_dotclock(struct intel_display *display)
 	int max_dotclock = display->cdclk.max_dotclk_freq;
 	int limit = max_dotclock;
 
-	if (DISPLAY_VER(display) >= 30)
+	if (DISPLAY_VERx100(display) == 3002)
+		limit = 937500;
+	else if (DISPLAY_VER(display) >= 30)
 		limit = 1350000;
+	/*
+	 * Note: For other platforms though there are limits given
+	 * in the Bspec, however the limit is intentionally not
+	 * enforced to avoid regressions, unless real issues are
+	 * observed.
+	 */
 
 	return min(max_dotclock, limit);
 }
-- 
2.45.2