drm/amd/display: Send DISPLAY_OFF after power down on boot

[WHY]
update_clocks might not be called on headless adapters. This means
DISPLAY_OFF may not be sent in headless cases.

[HOW]
If hardware is powered down on boot because it is headless (mode set
does not happen on that adapter) also send DISPLAY_OFF notification.

Signed-off-by: Sung Lee <sung.lee@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
index c664404..543afa3 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
@@ -94,6 +94,15 @@ int rn_get_active_display_cnt_wa(
        return display_count;
 }
 
+void rn_set_low_power_state(struct clk_mgr *clk_mgr_base)
+{
+       struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
+
+       rn_vbios_smu_set_dcn_low_power_state(clk_mgr, DCN_PWR_STATE_LOW_POWER);
+       /* update power state */
+       clk_mgr_base->clks.pwr_state = DCN_PWR_STATE_LOW_POWER;
+}
+
 void rn_update_clocks(struct clk_mgr *clk_mgr_base,
                        struct dc_state *context,
                        bool safe_to_lower)
@@ -516,6 +525,7 @@ static struct clk_mgr_funcs dcn21_funcs = {
        .init_clocks = rn_init_clocks,
        .enable_pme_wa = rn_enable_pme_wa,
        .are_clock_states_equal = rn_are_clock_states_equal,
+       .set_low_power_state = rn_set_low_power_state,
        .notify_wm_ranges = rn_notify_wm_ranges,
        .notify_link_rate_change = rn_notify_link_rate_change,
 };

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index 95e9d05..8ca94f5 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -1450,33 +1450,42 @@ void dcn10_init_hw(struct dc *dc)
 void dcn10_power_down_on_boot(struct dc *dc)
 {
        int i = 0;
+       struct dc_link *edp_link;
 
-       if (dc->config.power_down_display_on_boot) {
-               struct dc_link *edp_link = get_edp_link(dc);
-
-               if (edp_link &&
-                               edp_link->link_enc->funcs->is_dig_enabled &&
-                               edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc) &&
-                               dc->hwseq->funcs.edp_backlight_control &&
-                               dc->hwss.power_down &&
-                               dc->hwss.edp_power_control) {
-                       dc->hwseq->funcs.edp_backlight_control(edp_link, false);
-                       dc->hwss.power_down(dc);
-                       dc->hwss.edp_power_control(edp_link, false);
-               } else {
-                       for (i = 0; i < dc->link_count; i++) {
-                               struct dc_link *link = dc->links[i];
-
-                               if (link->link_enc->funcs->is_dig_enabled &&
-                                               link->link_enc->funcs->is_dig_enabled(link->link_enc) &&
-                                               dc->hwss.power_down) {
-                                       dc->hwss.power_down(dc);
-                                       break;
-                               }
+       if (!dc->config.power_down_display_on_boot)
+               return;
+
+       edp_link = get_edp_link(dc);
+       if (edp_link &&
+                       edp_link->link_enc->funcs->is_dig_enabled &&
+                       edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc) &&
+                       dc->hwseq->funcs.edp_backlight_control &&
+                       dc->hwss.power_down &&
+                       dc->hwss.edp_power_control) {
+               dc->hwseq->funcs.edp_backlight_control(edp_link, false);
+               dc->hwss.power_down(dc);
+               dc->hwss.edp_power_control(edp_link, false);
+       } else {
+               for (i = 0; i < dc->link_count; i++) {
+                       struct dc_link *link = dc->links[i];
 
+                       if (link->link_enc->funcs->is_dig_enabled &&
+                                       link->link_enc->funcs->is_dig_enabled(link->link_enc) &&
+                                       dc->hwss.power_down) {
+                               dc->hwss.power_down(dc);
+                               break;
                        }
+
                }
        }
+
+       /*
+        * Call update_clocks with empty context
+        * to send DISPLAY_OFF
+        * Otherwise DISPLAY_OFF may not be asserted
+        */
+       if (dc->clk_mgr->funcs->set_low_power_state)
+               dc->clk_mgr->funcs->set_low_power_state(dc->clk_mgr);
 }
 
 void dcn10_reset_hw_ctx_wrap(

diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
index 5994d2a..947d610 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
@@ -230,6 +230,8 @@ struct clk_mgr_funcs {
 
        int (*get_dp_ref_clk_frequency)(struct clk_mgr *clk_mgr);
 
+       void (*set_low_power_state)(struct clk_mgr *clk_mgr);
+
        void (*init_clocks)(struct clk_mgr *clk_mgr);
 
        void (*enable_pme_wa) (struct clk_mgr *clk_mgr);