On 8/19/19 11:50 AM, David Francis wrote:
For DSC MST, sometimes monitors would break out in full-screen static. The issue traced back to the PPS generation code, where these variables were being used uninitialized and were picking up garbage.
memset to 0 to avoid this
Signed-off-by: David Francis David.Francis@amd.com
Patches 1-5 and 7 are:
Reviewed-by: Nicholas Kazlauskas nicholas.kazlauskas@amd.com
drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 3 +++ drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.c | 3 +++ 2 files changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c index 35c5467e60e8..619ac48edd05 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c @@ -491,6 +491,9 @@ bool dp_set_dsc_pps_sdp(struct pipe_ctx *pipe_ctx, bool enable) struct dsc_config dsc_cfg; uint8_t dsc_packed_pps[128];
memset(&dsc_cfg, 0, sizeof(dsc_cfg));memset(dsc_packed_pps, 0, 128);- /* Enable DSC hw block */ dsc_cfg.pic_width = stream->timing.h_addressable + stream->timing.h_border_left + stream->timing.h_border_right; dsc_cfg.pic_height = stream->timing.v_addressable + stream->timing.v_border_top + stream->timing.v_border_bottom;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.c index 379c9e4ac63b..16debe6d89f2 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.c @@ -207,6 +207,9 @@ static bool dsc2_get_packed_pps(struct display_stream_compressor *dsc, const str struct dsc_reg_values dsc_reg_vals; struct dsc_optc_config dsc_optc_cfg;
- memset(&dsc_reg_vals, 0, sizeof(dsc_reg_vals));
- memset(&dsc_optc_cfg, 0, sizeof(dsc_optc_cfg));
- DC_LOG_DSC("Getting packed DSC PPS for DSC Config:"); dsc_config_log(dsc, dsc_cfg); DC_LOG_DSC("DSC Picture Parameter Set (PPS):");