From: Jouni Högander jouni.hogander@intel.com
[ Upstream commit 2d6f2f79e06571d41eb1223abebe9097511c9544 ]
HW default for wake sync pulses is 18. 10 precharge and 8 preamble. There is no reason to change this especially as it is causing problems with certain eDP panels.
v3: Change "Fixes:" commit v2: Remove "fast wake" repeat from subject
Signed-off-by: Jouni Högander jouni.hogander@intel.com Fixes: e1c71f8f9180 ("drm/i915: Fix fast wake AUX sync len") Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/8475 Reviewed-by: Luca Coelho luciano.coelho@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20230530101649.2549949-1-jouni... (cherry picked from commit b29a20f7c4995a059ed764ce42389857426397c7) Signed-off-by: Joonas Lahtinen joonas.lahtinen@linux.intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 8325868770994..ab357161ccc3a 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c @@ -129,7 +129,7 @@ static int intel_dp_aux_sync_len(void)
static int intel_dp_aux_fw_sync_len(void) { - int precharge = 16; /* 10-16 */ + int precharge = 10; /* 10-16 */ int preamble = 8;
return precharge + preamble;