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drm/amd/display: Fixed the audio noise during mode switching with HDCP mode on

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[Why]
When HDCP is on, some display would introduce audio noise during
HDCP handling.

[How]
Mute before HDCP handling when disabling core link. Unmute after
HDCP when enabling core link.

Signed-off-by: Roy Chan <roy.chan@amd.com>
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Roy Chan 2020-11-24 18:20:13 -05:00 • committed by Alex Deucher
parent 4bbfae00ac
commit c0794a3b59
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/amd/display/dc/core/dc_link.c
View file

@ -3270,8 +3270,6 @@ void core_link_enable_stream(
#if defined(CONFIG_DRM_AMD_DC_DCN3_0)
#endif
dc->hwss.enable_audio_stream(pipe_ctx);
/* turn off otg test pattern if enable */
if (pipe_ctx->stream_res.tg->funcs->set_test_pattern)
pipe_ctx->stream_res.tg->funcs->set_test_pattern(pipe_ctx->stream_res.tg,
@ -3310,6 +3308,9 @@ void core_link_enable_stream(
#if defined(CONFIG_DRM_AMD_DC_HDCP)
update_psp_stream_config(pipe_ctx, false);
#endif
dc->hwss.enable_audio_stream(pipe_ctx);
} else { // if (IS_FPGA_MAXIMUS_DC(dc->ctx->dce_environment))
if (dc_is_dp_signal(pipe_ctx->stream->signal) ||
dc_is_virtual_signal(pipe_ctx->stream->signal))
@ -3337,6 +3338,8 @@ void core_link_disable_stream(struct pipe_ctx *pipe_ctx)
core_link_set_avmute(pipe_ctx, true);
}
dc->hwss.disable_audio_stream(pipe_ctx);
#if defined(CONFIG_DRM_AMD_DC_HDCP)
update_psp_stream_config(pipe_ctx, true);
#endif