From f9c8742c66e4b8180db4085555ace9f0775221ae Mon Sep 17 00:00:00 2001 From: David Francis Date: Wed, 19 Jun 2019 14:48:16 -0400 Subject: drm/amd/display: Write DSC enable to MST DPCD Rework the dm_helpers_write_dsc_enable callback to handle the MST case. Use the cached dsc_aux field. Reviewed-by: Wenjing Liu Signed-off-by: David Francis Signed-off-by: Mikita Lipski Signed-off-by: Alex Deucher --- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index 66f266a5e10b..069b7a6f5597 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -37,6 +37,7 @@ #include "dc.h" #include "amdgpu_dm.h" #include "amdgpu_dm_irq.h" +#include "amdgpu_dm_mst_types.h" #include "dm_helpers.h" @@ -516,8 +517,24 @@ bool dm_helpers_dp_write_dsc_enable( ) { uint8_t enable_dsc = enable ? 1 : 0; + struct amdgpu_dm_connector *aconnector; + + if (!stream) + return false; + + if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST) { + aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context; + + if (!aconnector->dsc_aux) + return false; + + return (drm_dp_dpcd_write(aconnector->dsc_aux, DP_DSC_ENABLE, &enable_dsc, 1) >= 0); + } + + if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT) + return dm_helpers_dp_write_dpcd(ctx, stream->link, DP_DSC_ENABLE, &enable_dsc, 1); - return dm_helpers_dp_write_dpcd(ctx, stream->sink->link, DP_DSC_ENABLE, &enable_dsc, 1); + return false; } bool dm_helpers_is_dp_sink_present(struct dc_link *link) -- cgit v1.2.3