drm/amd/display: Implement secure display on DCN21

[Why]
Porting secure display feature from DCN10 to DCN21. Support single
display for now and will extend to multiple displays.

[How]
- use workqueue to offload works for dmub or dmcu firmware
- after receiving ROI update from userspace, set skip_frame_cnt to 1
- refactor amdgpu_dm_crtc_handle_crc_window_irq()
- disable PSR before activating secure_display on a crtc
- check if secure_display is activated before enabling psr
- only work for single display for now.

Tested-by: Mark Broadworth <mark.broadworth@amd.com>
Reviewed-by: Wayne Lin <Wayne.Lin@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 26 insertions, 0 deletions

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 7a8f61517424..dc7c4d74cb5d 100644
--- a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
+++ b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
@@ -729,6 +729,10 @@ enum dmub_cmd_type {
 	/**
 	 * Command type used for all VBIOS interface commands.
 	 */
+	/**
+	 * Command type used for all SECURE_DISPLAY commands.
+	 */
+	DMUB_CMD__SECURE_DISPLAY = 85,
 
 	/**
 	 * Command type used to set DPIA HPD interrupt state
@@ -3143,6 +3147,24 @@ struct dmub_rb_cmd_get_usbc_cable_id {
 	} data;
 };
 
+enum dmub_cmd_secure_display_type {
+	DMUB_CMD__SECURE_DISPLAY_TEST_CMD = 0,
+	DMUB_CMD__SECURE_DISPLAY_CRC_STOP_UPDATE,
+	DMUB_CMD__SECURE_DISPLAY_CRC_WIN_NOTIFY
+};
+
+struct dmub_rb_cmd_secure_display {
+	struct dmub_cmd_header header;
+	struct dmub_cmd_roi_info {
+		uint16_t x_start;
+		uint16_t x_end;
+		uint16_t y_start;
+		uint16_t y_end;
+		uint8_t otg_id;
+		uint8_t phy_id;
+	} roi_info;
+};
+
 /**
  * union dmub_rb_cmd - DMUB inbox command.
  */
@@ -3348,6 +3370,10 @@ union dmub_rb_cmd {
 	 */
 	struct dmub_rb_cmd_query_hpd_state query_hpd;
 	/**
+	 * Definition of a DMUB_CMD__SECURE_DISPLAY command.
+	 */
+	struct dmub_rb_cmd_secure_display secure_display;
+	/**
 	 * Definition of a DMUB_CMD__DPIA_HPD_INT_ENABLE command.
 	 */
 	struct dmub_rb_cmd_dpia_hpd_int_enable dpia_hpd_int_enable;