From 8e1f47e6bb44d148ca53cfd557f5aa1430fe6a47 Mon Sep 17 00:00:00 2001 From: Chris Park Date: Mon, 10 Aug 2020 14:20:16 -0400 Subject: [PATCH] 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] Expose DAL interface to send DMUB command for LVTMA control that VBIOS currently uses. Signed-off-by: Chris Park Reviewed-by: Nicholas Kazlauskas Acked-by: Eryk Brol Signed-off-by: Alex Deucher --- .../gpu/drm/amd/display/dc/bios/command_table2.c | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) 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 a91d7be..25bdf1c3 100644 --- a/drivers/gpu/drm/amd/display/dc/bios/command_table2.c +++ b/drivers/gpu/drm/amd/display/dc/bios/command_table2.c @@ -920,11 +920,39 @@ static void init_enable_lvtma_control(struct bios_parser *bp) } +static void enable_lvtma_control_dmcub( + struct dc_dmub_srv *dmcub, + uint8_t uc_pwr_on) +{ + + union dmub_rb_cmd cmd; + + memset(&cmd, 0, sizeof(cmd)); + + cmd.cmd_common.header.type = DMUB_CMD__VBIOS; + cmd.cmd_common.header.sub_type = + DMUB_CMD__VBIOS_LVTMA_CONTROL; + cmd.cmd_common.cmd_buffer[0] = + uc_pwr_on; + + dc_dmub_srv_cmd_queue(dmcub, &cmd); + dc_dmub_srv_cmd_execute(dmcub); + dc_dmub_srv_wait_idle(dmcub); + +} + static enum bp_result enable_lvtma_control( struct bios_parser *bp, uint8_t uc_pwr_on) { enum bp_result result = BP_RESULT_FAILURE; + + if (bp->base.ctx->dc->ctx->dmub_srv && + bp->base.ctx->dc->debug.dmub_command_table) { + enable_lvtma_control_dmcub(bp->base.ctx->dmub_srv, + uc_pwr_on); + return BP_RESULT_OK; + } return result; } -- 2.7.4