From: Xiaolin Zhang <xiaolin.zhang@intel.com>
Date: Thu, 21 Jun 2018 14:33:43 +0800
Subject: drm/i915/gvt: changed DDI mode emulation type
Git-commit: a4cae23cc05ccec749c2fc70fa9d8cda7c582319
Patch-mainline: v4.18-rc4
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
changed gvt display transcode DDI mode from DP_SST to
DVI to address below calltrace issue during guest booting
up which is caused by zero dotclock initial value with DP_SST
mode. transcode DVI mode emulation also align with native with DP
connection.
[drm:drm_calc_timestamping_constants]
ERROR crtc 41: Can't calculate constants, dotclock = 0!
WARNING: at drivers/gpu/drm/drm_vblank.c:620
drm_calc_vbltimestamp_from_scanoutpos
Call Trace:
? drm_calc_timestamping_constants+0x144/0x150 [drm]
drm_get_last_vbltimestamp+0x54/0x90 [drm]
drm_reset_vblank_timestamp+0x59/0xd0 [drm]
drm_crtc_vblank_on+0x7b/0xd0 [drm]
intel_modeset_setup_hw_state+0xb67/0xfd0 [i915]
? gen2_read32+0x110/0x110 [i915]
? drm_modeset_lock+0x30/0xa0 [drm]
intel_modeset_init+0x794/0x19d0 [i915]
? intel_setup_gmbus+0x232/0x2e0 [i915]
i915_driver_load+0xb4a/0xf40 [i915]
Signed-off-by: Xiaolin Zhang <xiaolin.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/gvt/display.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/i915/gvt/display.c
+++ b/drivers/gpu/drm/i915/gvt/display.c
@@ -196,7 +196,7 @@ static void emulate_monitor_status_chang
~(TRANS_DDI_BPC_MASK | TRANS_DDI_MODE_SELECT_MASK |
TRANS_DDI_PORT_MASK);
vgpu_vreg_t(vgpu, TRANS_DDI_FUNC_CTL(TRANSCODER_A)) |=
- (TRANS_DDI_BPC_8 | TRANS_DDI_MODE_SELECT_DP_SST |
+ (TRANS_DDI_BPC_8 | TRANS_DDI_MODE_SELECT_DVI |
(PORT_B << TRANS_DDI_PORT_SHIFT) |
TRANS_DDI_FUNC_ENABLE);
if (IS_BROADWELL(dev_priv)) {
@@ -216,7 +216,7 @@ static void emulate_monitor_status_chang
~(TRANS_DDI_BPC_MASK | TRANS_DDI_MODE_SELECT_MASK |
TRANS_DDI_PORT_MASK);
vgpu_vreg_t(vgpu, TRANS_DDI_FUNC_CTL(TRANSCODER_A)) |=
- (TRANS_DDI_BPC_8 | TRANS_DDI_MODE_SELECT_DP_SST |
+ (TRANS_DDI_BPC_8 | TRANS_DDI_MODE_SELECT_DVI |
(PORT_C << TRANS_DDI_PORT_SHIFT) |
TRANS_DDI_FUNC_ENABLE);
if (IS_BROADWELL(dev_priv)) {
@@ -236,7 +236,7 @@ static void emulate_monitor_status_chang
~(TRANS_DDI_BPC_MASK | TRANS_DDI_MODE_SELECT_MASK |
TRANS_DDI_PORT_MASK);
vgpu_vreg_t(vgpu, TRANS_DDI_FUNC_CTL(TRANSCODER_A)) |=
- (TRANS_DDI_BPC_8 | TRANS_DDI_MODE_SELECT_DP_SST |
+ (TRANS_DDI_BPC_8 | TRANS_DDI_MODE_SELECT_DVI |
(PORT_D << TRANS_DDI_PORT_SHIFT) |
TRANS_DDI_FUNC_ENABLE);
if (IS_BROADWELL(dev_priv)) {