diff options
| author | Tina Zhang <tina.zhang@intel.com> | 2020-09-21 02:58:07 -0400 |
|---|---|---|
| committer | Zhenyu Wang <zhenyuw@linux.intel.com> | 2020-11-12 14:57:08 +0800 |
| commit | edb8d77a939c422f3ae57f557cd1d6899d9bafad (patch) | |
| tree | 3478442975ced7f3fd011f04108ff146b534f791 | |
| parent | 642403e3599e80370f71ba7a8a8c8fa82e5f6706 (diff) | |
| download | linux-edb8d77a939c422f3ae57f557cd1d6899d9bafad.tar.bz2 | |
drm/i915/gvt: Set ENHANCED_FRAME_CAP bit
Specification says the bit7 of the DPCD MAX_LANE_COUNT (offset 0x02) must
be set to 1 when comes to the displayport version 1.2. This patch respects
the definition.
W/o this patch, guest i915 driver can only set the resolution to 1024*768,
and complains about the unsuccessful link training:
[ 5.692193] i915 0000:00:02.0: [drm] *ERROR* index 0, lane_count 1 Link Training Unsuccessful
Fixes: e2e02cbb5beb ("drm/i915/gvt: make dpcd_fix_data supports DP1.2")
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Tina Zhang <tina.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200921065807.247847-1-tina.zhang@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/display.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/gvt/display.c b/drivers/gpu/drm/i915/gvt/display.c index 7ba16ddfe75f..d7898e87791f 100644 --- a/drivers/gpu/drm/i915/gvt/display.c +++ b/drivers/gpu/drm/i915/gvt/display.c @@ -164,7 +164,7 @@ static unsigned char virtual_dp_monitor_edid[GVT_EDID_NUM][EDID_SIZE] = { /* let the virtual display supports DP1.2 */ static u8 dpcd_fix_data[DPCD_HEADER_SIZE] = { - 0x12, 0x014, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 + 0x12, 0x014, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static void emulate_monitor_status_change(struct intel_vgpu *vgpu) |