github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-25 07:33:19 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/amd/display: Ensure link output is disabled in backend reset for PLL_ON

Browse Source 
[Why]
We're missing the code to actually disable the link output when we have
to leave the SYMCLK_ON but the TX remains OFF.

[How]
Port the code from DCN401 that detects SYMCLK_ON_TX_OFF and disable
the link output when the backend is reset.

Reviewed-by: Ovidiu (Ovi) Bunea <ovidiu.bunea@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Matthew Stewart <matthew.stewart2@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nicholas Kazlauskas 2026-01-06 11:11:19 -05:00 committed by Alex Deucher
parent d5db4f88e0
commit 4589712e01
1 changed files with 15 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c
View File

@ -546,8 +546,22 @@ static void dcn31_reset_back_end_for_pipe(
if (pipe_ctx->stream_res.tg->funcs->set_odm_bypass)
pipe_ctx->stream_res.tg->funcs->set_odm_bypass(
pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing);
/*
* TODO - convert symclk_ref_cnts for otg to a bit map to solve
* the case where the same symclk is shared across multiple otg
* instances
*/
if (dc_is_hdmi_tmds_signal(pipe_ctx->stream->signal))
pipe_ctx->stream->link->phy_state.symclk_ref_cnts.otg = 0;
link->phy_state.symclk_ref_cnts.otg = 0;
if (pipe_ctx->top_pipe == NULL) {
if (link->phy_state.symclk_state == SYMCLK_ON_TX_OFF) {
const struct link_hwss *link_hwss = get_link_hwss(link, &pipe_ctx->link_res);
link_hwss->disable_link_output(link, &pipe_ctx->link_res, pipe_ctx->stream->signal);
link->phy_state.symclk_state = SYMCLK_OFF_TX_OFF;
}
}
set_drr_and_clear_adjust_pending(pipe_ctx, pipe_ctx->stream, NULL);