[PATCH 344/459] drm/amd/display: Program VTG params after programming Global Sync for DCN2

[Alex Deucher]

From: Joshua Aberback <joshua.aberback at amd.com>

[Why]
VTG has a parameter FP2, which is defined as:
    if VSTARTUP is before VSYNC:
        FP2 = number of lines in between VSTARTUP and VSYNC
    else
        FP2 = 0
Currently, FP2 is only programmed during "program_timing". However, the
position of VSTARTUP is affected by the prefetching requirements on all pipes,
so the position might change when we do memory request control on another pipe, so we need
to make sure that FP2 stays up-to-date whenever we adjust VSTARTUP.

[How]
 - refactor VTG_CONTROL programming into a new function "set_vtg_params"
 - call it after calling "program_global_sync"
   - make sure it's called after because it relies on the cached dlg params

Signed-off-by: Joshua Aberback <joshua.aberback at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>
Acked-by: Jun Lei <Jun.Lei at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 6 ++++++
 drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c  | 1 +
 2 files changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
index 1fd89cc218a5..5bed89547410 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1206,6 +1206,9 @@ static void dcn20_program_all_pipe_in_tree(
 				pipe_ctx->pipe_dlg_param.vupdate_offset,
 				pipe_ctx->pipe_dlg_param.vupdate_width);
 
+		pipe_ctx->stream_res.tg->funcs->set_vtg_params(
+				pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing);
+
 		dc->hwss.blank_pixel_data(dc, pipe_ctx, blank);
 
 		if (dc->hwss.update_odm)
@@ -1442,6 +1445,9 @@ bool dcn20_update_bandwidth(
 					pipe_ctx->pipe_dlg_param.vupdate_offset,
 					pipe_ctx->pipe_dlg_param.vupdate_width);
 
+			pipe_ctx->stream_res.tg->funcs->set_vtg_params(
+					pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing);
+
 			dc->hwss.blank_pixel_data(dc, pipe_ctx, blank);
 		}
 
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c
index 875b48e450f8..cee1ed11ffe3 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c
@@ -434,6 +434,7 @@ static struct timing_generator_funcs dcn20_tg_funcs = {
 		.get_optc_source = optc2_get_optc_source,
 		.set_gsl = optc2_set_gsl,
 		.set_gsl_source_select = optc2_set_gsl_source_select,
+		.set_vtg_params = optc1_set_vtg_params,
 };
 
 void dcn20_timing_generator_init(struct optc *optc1)
-- 
2.20.1