From: Nikola Cornij <nikola.cornij@amd.com>
Date: Wed, 19 Jun 2019 18:30:52 +0000 (-0400)
Subject: drm/amd/display: Power-gate all DSCs at driver init time
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=75c35000235f3662f2810e9a59b0c8eed045432e;p=linux.git

drm/amd/display: Power-gate all DSCs at driver init time

[why]
DSC should be powered-on only on as-needed basis, i.e. if the mode
requires it

[how]
Loop over all the DSCs at driver init time and power-gate each

Signed-off-by: Nikola Cornij <nikola.cornij@amd.com>
Reviewed-by: Nevenko Stupar <Nevenko.Stupar@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
index ddf15a3715e0e..5ecf965bc3f5a 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -624,6 +624,10 @@ static void dcn20_init_hw(struct dc *dc)
 		}
 	}
 
+	/* Power gate DSCs */
+	for (i = 0; i < res_pool->res_cap->num_dsc; i++)
+		dcn20_dsc_pg_control(hws, res_pool->dscs[i]->inst, false);
+
 	/* Blank pixel data with OPP DPG */
 	for (i = 0; i < dc->res_pool->timing_generator_count; i++) {
 		struct timing_generator *tg = dc->res_pool->timing_generators[i];