[PATCH v5 5/5] drm/i915/display: Increase number of fast wake precharge pulses

From: "Jouni Högander" <jouni.hogander@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>,
	"Jani Nikula" <jani.nikula@linux.intel.com>,
	"Jouni Högander" <jouni.hogander@intel.com>
Subject: [PATCH v5 5/5] drm/i915/display: Increase number of fast wake precharge pulses
Date: Fri,  8 Mar 2024 13:00:39 +0200	[thread overview]
Message-ID: <20240308110039.3900838-6-jouni.hogander@intel.com> (raw)
In-Reply-To: <20240308110039.3900838-1-jouni.hogander@intel.com>

Increasing number of fast wake sync pulses seem to fix problems with
certain PSR panels. This should be ok for other panels as well as the eDP
specification allows 10...16 precharge pulses and we are still within that
range.

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/9739
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp_aux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c b/drivers/gpu/drm/i915/display/intel_dp_aux.c
index 7e69be100d90..5dff1bc85d61 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c
@@ -145,7 +145,7 @@ static int intel_dp_aux_sync_len(void)
 
 int intel_dp_aux_fw_sync_len(void)
 {
-	int precharge = 10; /* 10-16 */
+	int precharge = 12; /* 10-16 */
 	int preamble = 8;
 
 	return precharge + preamble;
-- 
2.34.1

