drm/amd/display: Return last used DRR VTOTAL from DC

[platform/kernel/linux-starfive.git] / drivers / gpu / drm / amd / display / dc / core / dc.c

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 2b7639a..be1dbd3 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -325,6 +325,48 @@ bool dc_stream_adjust_vmin_vmax(struct dc *dc,
        return ret;
 }
 
+/**
+ *****************************************************************************
+ *  Function: dc_stream_get_last_vrr_vtotal
+ *
+ *  @brief
+ *     Looks up the pipe context of dc_stream_state and gets the
+ *     last VTOTAL used by DRR (Dynamic Refresh Rate)
+ *
+ *  @param [in] dc: dc reference
+ *  @param [in] stream: Initial dc stream state
+ *  @param [in] adjust: Updated parameters for vertical_total_min and
+ *  vertical_total_max
+ *****************************************************************************
+ */
+bool dc_stream_get_last_used_drr_vtotal(struct dc *dc,
+               struct dc_stream_state *stream,
+               uint32_t *refresh_rate)
+{
+       bool status = false;
+
+       int i = 0;
+
+       for (i = 0; i < MAX_PIPES; i++) {
+               struct pipe_ctx *pipe = &dc->current_state->res_ctx.pipe_ctx[i];
+
+               if (pipe->stream == stream && pipe->stream_res.tg) {
+                       /* Only execute if a function pointer has been defined for
+                        * the DC version in question
+                        */
+                       if (pipe->stream_res.tg->funcs->get_last_used_drr_vtotal) {
+                               pipe->stream_res.tg->funcs->get_last_used_drr_vtotal(pipe->stream_res.tg, refresh_rate);
+
+                               status = true;
+
+                               break;
+                       }
+               }
+       }
+
+       return status;
+}
+
 bool dc_stream_get_crtc_position(struct dc *dc,
                struct dc_stream_state **streams, int num_streams,
                unsigned int *v_pos, unsigned int *nom_v_pos)