diff options
author | Chiawen Huang <chiawen.huang@amd.com> | 2020-09-25 10:54:50 -0400 |
---|---|---|
committer | Alex Deucher <alexander.deucher@amd.com> | 2020-09-29 16:08:44 -0400 |
commit | ba578afd5a4f6139ffe564f07575875ca51a0f4f (patch) | |
tree | 9feea5db2abf55b0a75907757aab4bb08846ad40 /drivers/gpu/drm/amd/display/dc/core | |
parent | 89b151ade71495ebe2e48923812571e8e6a92918 (diff) | |
download | linux-ba578afd5a4f6139ffe564f07575875ca51a0f4f.tar.bz2 |
drm/amd/display: disable stream if pixel clock changed with link active
[Why]
Vbios uses preferred timing to turn on edp but OS could use other
timing. If change pixel clock when link active, there is unexpected
garbage on monitor.
[How]
Once pixel clock changed, the driver needs to disable stream.
Signed-off-by: Chiawen Huang <chiawen.huang@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc.c | 62 |
1 files changed, 59 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 7e74ddc1c708..9fabe264cdea 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -842,6 +842,61 @@ static void disable_dangling_plane(struct dc *dc, struct dc_state *context) dc_release_state(current_ctx); } +static void disable_vbios_mode_if_required( + struct dc *dc, + struct dc_state *context) +{ + unsigned int i; + + /* check if timing_changed, disable stream*/ + for (i = 0; i < dc->res_pool->pipe_count; i++) { + struct dc_stream_state *stream = NULL; + struct dc_link *link = NULL; + struct pipe_ctx *pipe = NULL; + + pipe = &context->res_ctx.pipe_ctx[i]; + stream = pipe->stream; + if (stream == NULL) + continue; + + if (stream->link->local_sink && + stream->link->local_sink->sink_signal == SIGNAL_TYPE_EDP) { + link = stream->link; + break; + } + + if (link != NULL) { + unsigned int enc_inst, tg_inst = 0; + unsigned int pix_clk_100hz; + + enc_inst = link->link_enc->funcs->get_dig_frontend(link->link_enc); + if (enc_inst != ENGINE_ID_UNKNOWN) { + for (i = 0; i < dc->res_pool->stream_enc_count; i++) { + if (dc->res_pool->stream_enc[i]->id == enc_inst) { + tg_inst = dc->res_pool->stream_enc[i]->funcs->dig_source_otg( + dc->res_pool->stream_enc[i]); + break; + } + } + + dc->res_pool->dp_clock_source->funcs->get_pixel_clk_frequency_100hz( + dc->res_pool->dp_clock_source, + tg_inst, &pix_clk_100hz); + + if (link->link_status.link_active) { + uint32_t requested_pix_clk_100hz = + pipe->stream_res.pix_clk_params.requested_pix_clk_100hz; + + if (pix_clk_100hz != requested_pix_clk_100hz) { + core_link_disable_stream(pipe); + pipe->stream->dpms_off = false; + } + } + } + } + } +} + static void wait_for_no_pipes_pending(struct dc *dc, struct dc_state *context) { int i; @@ -1278,13 +1333,14 @@ static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *c for (i = 0; i < context->stream_count; i++) dc_streams[i] = context->streams[i]; - if (!dcb->funcs->is_accelerated_mode(dcb)) + if (!dcb->funcs->is_accelerated_mode(dcb)) { + disable_vbios_mode_if_required(dc, context); dc->hwss.enable_accelerated_mode(dc, context); + } - for (i = 0; i < context->stream_count; i++) { + for (i = 0; i < context->stream_count; i++) if (context->streams[i]->apply_seamless_boot_optimization) dc->optimize_seamless_boot_streams++; - } if (context->stream_count > dc->optimize_seamless_boot_streams || context->stream_count == 0) |