From: Sung Joon Kim <sungkim@amd.com>
Date: Mon, 16 Oct 2023 19:23:16 +0000 (-0400)
Subject: drm/amd/display: Fix FRL assertion on boot
X-Git-Tag: v6.7-rc1~8^2^2~60
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=f896cd2686817db915c265ff693a8dad7b6580dc;p=linux-block.git

drm/amd/display: Fix FRL assertion on boot

[why]
Make sure to ungate the clocks on boot
so programming sequence is done successfully.

[how]
Move the ungate logic after bios init.

Reviewed-by: Xi (Alex) Liu <xi.liu@amd.com>
Acked-by: Hersen Wu <hersenxs.wu@amd.com>
Signed-off-by: Sung Joon Kim <sungkim@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c
index ff46e36cb254..0569fa6f7600 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c
@@ -138,16 +138,17 @@ void dcn35_init_hw(struct dc *dc)
 	if (dc->clk_mgr && dc->clk_mgr->funcs->init_clocks)
 		dc->clk_mgr->funcs->init_clocks(dc->clk_mgr);
 
-	REG_WRITE(DCCG_GATE_DISABLE_CNTL, 0);
-	REG_WRITE(DCCG_GATE_DISABLE_CNTL2, 0x3F000000);
-	REG_WRITE(DCCG_GATE_DISABLE_CNTL5, 0x1f7c3fcf);
-
 	//dcn35_set_dmu_fgcg(hws, dc->debug.enable_fine_grain_clock_gating.bits.dmu);
 
 	if (!dcb->funcs->is_accelerated_mode(dcb)) {
 		/*this calls into dmubfw to do the init*/
 		hws->funcs.bios_golden_init(dc);
 	}
+
+	REG_WRITE(DCCG_GATE_DISABLE_CNTL, 0);
+	REG_WRITE(DCCG_GATE_DISABLE_CNTL2, 0x3F000000);
+	REG_WRITE(DCCG_GATE_DISABLE_CNTL5, 0x1f7c3fcf);
+
 	// Initialize the dccg
 	if (res_pool->dccg->funcs->dccg_init)
 		res_pool->dccg->funcs->dccg_init(res_pool->dccg);