1 files changed, 40 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3046-drm-amd-display-Power-gate-all-DSCs-at-driver-init-t.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3046-drm-amd-display-Power-gate-all-DSCs-at-driver-init-t.patch
new file mode 100644
index 00000000..47745cda
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3046-drm-amd-display-Power-gate-all-DSCs-at-driver-init-t.patch
@@ -0,0 +1,40 @@
+From aa07dc450ffff6826e4877f410143ebcd01f6e0e Mon Sep 17 00:00:00 2001
+From: Nikola Cornij <nikola.cornij@amd.com>
+Date: Wed, 19 Jun 2019 14:30:52 -0400
+Subject: [PATCH 3046/4256] 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>
+---
+ drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+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 db57c2a99a15..b753e40c4196 100644
+--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
++++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+@@ -599,6 +599,12 @@ static void dcn20_init_hw(struct dc *dc)
+ 		}
+ 	}
+ 
++#ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
++	/* 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);
++#endif
++
+ 	/* 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];
+-- 
+2.17.1
+