[Bug 797087] New: vaapi: error message occurs when do avc cqp vdenc with i965 driver

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=797087

            Bug ID: 797087
           Summary: vaapi: error message occurs when do avc cqp vdenc with
                    i965 driver
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer-vaapi
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: zhanjunx.wang at intel.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

System Environment
=======
platform: KBL
kernel: 4.14.0-rc1
libva-intel-driver: master branch d805098c739a9dfffacb2591ad8906b70376216e
gst-vaapi: master branch 148d75c8af116e4128858e75dc393b7f0086cff8
guc: kbl_guc_ver9_14.bin
huc: kbl_huc_ver02_00_1810.bin

Regression?
=======
No

Bug detailed description
=======
when do avc cqp vdenc, the cmd failed and error message occurs,
but it can pass with cbr/vbr mode.

Reproduce Steps
==============
1. gst-launch-1.0 filesrc location=/media/encoderbitstreams//1080p_blue_sky.yuv
! videoparse format=i420 width=1920 height=1080 framerate=30 ! vaapih264enc
rate-control=cqp tune=3 ! video/x-h264,profile=main ! h264parse ! filesink
location=./test_lowp.h264
2. error info
Got context from element 'vaapiencodeh264-0': gst.vaapi.Display=context,
gst.vaapi.Display=(GstVaapiDisplay)"(GstVaapiDisplayX11)\ vaapidisplayx11-0";
0:00:00.059712283 15517 0x12472d0 ERROR vaapi
gstvaapicontext.c:323:config_create: Mismatched ROI support: number of regions
supported: 3 ROI delta QP: 0
0:00:00.059735632 15517 0x12472d0 ERROR vaapi
gstvaapiencoder.c:997:gst_vaapi_encoder_reconfigure_internal: failed to update
VA context
ERROR: from element
/GstPipeline:pipeline0/GstVideoParse:videoparse0/GstRawVideoParse:inner_rawvideoparse:
Internal data stream error.
Additional debug info:
gstbaseparse.c(3656): gst_base_parse_loop ():
/GstPipeline:pipeline0/GstVideoParse:videoparse0/GstRawVideoParse:inner_rawvideoparse:
streaming stopped, reason not-negotiated (-4)

Expected Result
=============
avc vdenc cmd can run successfully with cqp mode, and the encoded file has no
problem.

Actual Result
===========
error message occurs when do avc cqp vdenc

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