[PATCH 19/22] drm/amd/display: To support sending TPS3 pattern when restoring link

[Anson Jacob]

From: Robin Chen <po-tchen at amd.com>

[Why]
Some panels require to use TPS3 pattern to wake up link in PSR mode.

[How]
To add TPS3 selection information in PSR settings command and pass to
DMUB FW.

Reviewed-by: Anthony Koo <Anthony.Koo at amd.com>
Acked-by: Anson Jacob <Anson.Jacob at amd.com>
Signed-off-by: Robin Chen <po-tchen at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c           | 9 +++++++++
 drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h         | 5 ++---
 drivers/gpu/drm/amd/display/include/ddc_service_types.h | 3 +++
 3 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
index e9c0ec2ec4ce..60b2ccffaf90 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
@@ -330,6 +330,15 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
 	copy_settings_data->cmd_version =  DMUB_CMD_PSR_CONTROL_VERSION_1;
 	copy_settings_data->panel_inst = panel_inst;
 
+	if (link->fec_state == dc_link_fec_enabled &&
+		(!memcmp(link->dpcd_caps.sink_dev_id_str, DP_SINK_DEVICE_STR_ID_1,
+			sizeof(link->dpcd_caps.sink_dev_id_str)) ||
+		!memcmp(link->dpcd_caps.sink_dev_id_str, DP_SINK_DEVICE_STR_ID_2,
+			sizeof(link->dpcd_caps.sink_dev_id_str))))
+		copy_settings_data->debug.bitfields.force_wakeup_by_tps3 = 1;
+	else
+		copy_settings_data->debug.bitfields.force_wakeup_by_tps3 = 0;
+
 	dc_dmub_srv_cmd_queue(dc->dmub_srv, &cmd);
 	dc_dmub_srv_cmd_execute(dc->dmub_srv);
 	dc_dmub_srv_wait_idle(dc->dmub_srv);
diff --git a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
index 1c4cac4a4894..93631b0db881 100644
--- a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
+++ b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
@@ -209,10 +209,9 @@ union dmub_psr_debug_flags {
 		uint32_t use_hw_lock_mgr : 1;
 
 		/**
-		 * Unused.
-		 * TODO: Remove.
+		 * Use TPS3 signal when restore main link.
 		 */
-		uint32_t log_line_nums : 1;
+		uint32_t force_wakeup_by_tps3 : 1;
 	} bitfields;
 
 	/**
diff --git a/drivers/gpu/drm/amd/display/include/ddc_service_types.h b/drivers/gpu/drm/amd/display/include/ddc_service_types.h
index 4de59b66bb1a..85b25e684464 100644
--- a/drivers/gpu/drm/amd/display/include/ddc_service_types.h
+++ b/drivers/gpu/drm/amd/display/include/ddc_service_types.h
@@ -117,4 +117,7 @@ struct av_sync_data {
 	uint8_t aud_del_ins3;/* DPCD 0002Dh */
 };
 
+static const uint8_t DP_SINK_DEVICE_STR_ID_1[] = {7, 1, 8, 7, 3, 0};
+static const uint8_t DP_SINK_DEVICE_STR_ID_2[] = {7, 1, 8, 7, 5, 0};
+
 #endif /* __DAL_DDC_SERVICE_TYPES_H__ */
-- 
2.25.1