drm/amd/display: Blank HUBP during pixel data blank for DCN30

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[Why]
There are some timings for which we support p-state
switching in active, but not in blank. There was a
previous issue where a timing that had active-only
support would hang a p-state request when we were in
an extended blanking period. The workaround for that
issue was to block active-only p-state switching,
but that resulted in a lack of p-state support for
some common timings such as 1440p60. We want to fix
that issue properly by un-blocking p-state requests
while the display is blanked, so that we can re-enable
active-only p-state switching.

[How]
 - new version of blank_pixel_data for DCN30
 - call hubp->set_blank from dcn30_blank_pixel_data
 - blank every hubp in the mpcc tree, and odm tree
 - on blank enable, wait until the next frame before blanking HUBP

Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Joshua Aberback 2020-10-18 17:36:00 -04:00 • committed by Alex Deucher

parent e748b59fb7

commit 36f878501e

4 changed files with 87 additions and 2 deletions

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83

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c

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2

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.h

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2

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_init.c

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2

drivers/gpu/drm/amd/display/dc/dml/dcn30/display_mode_vba_30.c

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