drm/amd/display: avoid disable otg when dig was disabled

[Why]
This is a workaround for an dcn3.1 hang that happens if otg dispclk
is ramped while otg is on and stream enc is off.
But this w/a should not trigger when we have a dig active.

[How]
Avoid disable otg when dig was disabled.

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Jingwen Zhu <Jingwen.Zhu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn315/dcn315_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn315/dcn315_clk_mgr.c
index 43d1f38..8c368bc 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn315/dcn315_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn315/dcn315_clk_mgr.c
@@ -87,6 +87,16 @@ static int dcn315_get_active_display_cnt_wa(
        return display_count;
 }
 
+bool should_disable_otg(struct pipe_ctx *pipe)
+{
+       bool ret = true;
+
+       if (pipe->stream->link->link_enc && pipe->stream->link->link_enc->funcs->is_dig_enabled &&
+                       pipe->stream->link->link_enc->funcs->is_dig_enabled(pipe->stream->link->link_enc))
+               ret = false;
+       return ret;
+}
+
 static void dcn315_disable_otg_wa(struct clk_mgr *clk_mgr_base, struct dc_state *context, bool disable)
 {
        struct dc *dc = clk_mgr_base->ctx->dc;
@@ -98,12 +108,16 @@ static void dcn315_disable_otg_wa(struct clk_mgr *clk_mgr_base, struct dc_state
                if (pipe->top_pipe || pipe->prev_odm_pipe)
                        continue;
                if (pipe->stream && (pipe->stream->dpms_off || pipe->plane_state == NULL ||
-                                    dc_is_virtual_signal(pipe->stream->signal))) {
-                       if (disable) {
-                               pipe->stream_res.tg->funcs->immediate_disable_crtc(pipe->stream_res.tg);
-                               reset_sync_context_for_pipe(dc, context, i);
-                       } else
-                               pipe->stream_res.tg->funcs->enable_crtc(pipe->stream_res.tg);
+                                       dc_is_virtual_signal(pipe->stream->signal))) {
+
+                       /* This w/a should not trigger when we have a dig active */
+                       if (should_disable_otg(pipe)) {
+                               if (disable) {
+                                       pipe->stream_res.tg->funcs->immediate_disable_crtc(pipe->stream_res.tg);
+                                       reset_sync_context_for_pipe(dc, context, i);
+                               } else
+                                       pipe->stream_res.tg->funcs->enable_crtc(pipe->stream_res.tg);
+                       }
                }
        }
 }