diff options
| author | Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> | 2021-11-02 21:27:30 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-11-22 22:45:01 +0300 |
| commit | a53b554b56e0326edb2ddbbf8c76743191f7819c (patch) | |
| tree | 9be0deedd1d747c27c284b8a606493a09e553854 /drivers/gpu/drm | |
| parent | c09bb36dd1230838d49a5ebf409df804a5ebfdaa (diff) | |
| download | linux-a53b554b56e0326edb2ddbbf8c76743191f7819c.tar.xz | |
drm/amd/display: Only flush delta from last command execution
[Why]
We're currently flushing commands that had been previously been
flushed or are currently being processed by the DMCUB when we don't
immediately wait for idle after command execution.
[How]
Avoiding reflushing the data by keeping track of the last wptr.
We'll treat this as the actual rptr by creating a copy of the inbox
and modifying the copy's rptr.
Reviewed-by: Eric Yang <Eric.Yang2@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dmub/dmub_srv.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c | 9 |
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dmub/dmub_srv.h b/drivers/gpu/drm/amd/display/dmub/dmub_srv.h index 90065a09e76a..83855b8a32e9 100644 --- a/drivers/gpu/drm/amd/display/dmub/dmub_srv.h +++ b/drivers/gpu/drm/amd/display/dmub/dmub_srv.h @@ -411,6 +411,7 @@ struct dmub_srv { struct dmub_srv_base_funcs funcs; struct dmub_srv_hw_funcs hw_funcs; struct dmub_rb inbox1_rb; + uint32_t inbox1_last_wptr; /** * outbox1_rb is accessed without locks (dal & dc) * and to be used only in dmub_srv_stat_get_notification() diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c index 56a03328e8e6..6cc897dacd92 100644 --- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c +++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c @@ -609,6 +609,8 @@ enum dmub_status dmub_srv_cmd_queue(struct dmub_srv *dmub, enum dmub_status dmub_srv_cmd_execute(struct dmub_srv *dmub) { + struct dmub_rb flush_rb; + if (!dmub->hw_init) return DMUB_STATUS_INVALID; @@ -617,9 +619,14 @@ enum dmub_status dmub_srv_cmd_execute(struct dmub_srv *dmub) * been flushed to framebuffer memory. Otherwise DMCUB might * read back stale, fully invalid or partially invalid data. */ - dmub_rb_flush_pending(&dmub->inbox1_rb); + flush_rb = dmub->inbox1_rb; + flush_rb.rptr = dmub->inbox1_last_wptr; + dmub_rb_flush_pending(&flush_rb); dmub->hw_funcs.set_inbox1_wptr(dmub, dmub->inbox1_rb.wrpt); + + dmub->inbox1_last_wptr = dmub->inbox1_rb.wrpt; + return DMUB_STATUS_OK; } |