From 04c7b058c49d42376da022c12cb0bbdd7d743ab6 Mon Sep 17 00:00:00 2001
From: William Tseng <william.tseng@intel.com>
Date: Tue, 9 Nov 2021 11:41:25 +0800
Subject: drm/i915/dsi: disable lpdt if it is not enabled
Git-commit: 38a1b50c0389f1ae385d007b02dec5f812b3e5ef
Patch-mainline: v5.17-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
Avoid setting LP_DATA_TRANSFER when enable_lpdt is false
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Cc: Lee Shawn C <shawn.c.lee@intel.com>
Cc: Cooper Chiou <cooper.chiou@intel.com>
Signed-off-by: William Tseng <william.tseng@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211109034125.11291-1-william.tseng@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/icl_dsi.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 426b226256ea..edc38fbd2545 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -183,6 +183,8 @@ static int dsi_send_pkt_hdr(struct intel_dsi_host *host,
if (enable_lpdt)
tmp |= LP_DATA_TRANSFER;
+ else
+ tmp &= ~LP_DATA_TRANSFER;
tmp &= ~(PARAM_WC_MASK | VC_MASK | DT_MASK);
tmp |= ((packet->header[0] & VC_MASK) << VC_SHIFT);
--
2.38.1