diff options
| author | Zi Yu Liao <ziyu.liao@amd.com> | 2019-07-30 15:36:53 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-07 19:01:20 +0200 |
| commit | 19a64792239cdd29078a120659aaac70c4d48e3f (patch) | |
| tree | c7ef964108d127328dd9590def663b1f32e3981f /drivers | |
| parent | adaf6a48e85f91ab4b2da7848fb781fd91268f79 (diff) | |
drm/amd/display: fix MPO HUBP underflow with Scatter Gather
[ Upstream commit 89cb5614736b9b5d3b833ca2237d10da6b4b0395 ]
[why]
With Scatter Gather enabled, HUBP underflows during MPO enabled video
playback. hubp_init has a register write that fixes this problem, but
the register is cleared when HUBP gets power gated.
[how]
Make a call to hubp_init during enable_plane, so that the fix can
be applied after HUBP powers back on again.
Signed-off-by: Zi Yu Liao <ziyu.liao@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c index f8abe98a576b..8fdb53a44bfb 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c @@ -1110,6 +1110,9 @@ void dcn20_enable_plane( /* enable DCFCLK current DCHUB */ pipe_ctx->plane_res.hubp->funcs->hubp_clk_cntl(pipe_ctx->plane_res.hubp, true); + /* initialize HUBP on power up */ + pipe_ctx->plane_res.hubp->funcs->hubp_init(pipe_ctx->plane_res.hubp); + /* make sure OPP_PIPE_CLOCK_EN = 1 */ pipe_ctx->stream_res.opp->funcs->opp_pipe_clock_control( pipe_ctx->stream_res.opp, |