drm/amd/display: Call DMUB for eDP power control

[Why]
If DMUB is used, LVTMA VBIOS call can be used to control eDP instead of
tranditional transmitter control.  Interface is agreed with VBIOS for
eDP to use this new path to program LVTMA registers.

[How]
Create DAL interface to send DMUB command for LVTMA as currently
implemented in VBIOS.

Signed-off-by: Chris Park <Chris.Park@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/bios/command_table2.c b/drivers/gpu/drm/amd/display/dc/bios/command_table2.c
index e8f52eb8ef0d..a91d7be5d86e 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/command_table2.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/command_table2.c
@@ -901,6 +901,33 @@ static unsigned int get_smu_clock_info_v3_1(struct bios_parser *bp, uint8_t id)
 	return 0;
 }
 
+/******************************************************************************
+ ******************************************************************************
+ **
+ **                  LVTMA CONTROL
+ **
+ ******************************************************************************
+ *****************************************************************************/
+
+static enum bp_result enable_lvtma_control(
+	struct bios_parser *bp,
+	uint8_t uc_pwr_on);
+
+static void init_enable_lvtma_control(struct bios_parser *bp)
+{
+	/* TODO add switch for table vrsion */
+	bp->cmd_tbl.enable_lvtma_control = enable_lvtma_control;
+
+}
+
+static enum bp_result enable_lvtma_control(
+	struct bios_parser *bp,
+	uint8_t uc_pwr_on)
+{
+	enum bp_result result = BP_RESULT_FAILURE;
+	return result;
+}
+
 void dal_firmware_parser_init_cmd_tbl(struct bios_parser *bp)
 {
 	init_dig_encoder_control(bp);
@@ -916,4 +943,5 @@ void dal_firmware_parser_init_cmd_tbl(struct bios_parser *bp)
 	init_set_dce_clock(bp);
 	init_get_smu_clock_info(bp);
 
+	init_enable_lvtma_control(bp);
 }