This is a note to let you know that I've just added the patch titled
drm/amd/display: disable RCO for DCN314
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-disable-rco-for-dcn314.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 85e41f1ed5d94a26fe4e57003c399936d291ed70 Mon Sep 17 00:00:00 2001
From: Daniel Miess <daniel.miess@xxxxxxx>
Date: Wed, 7 Jun 2023 11:11:44 -0400
Subject: drm/amd/display: disable RCO for DCN314
From: Daniel Miess <daniel.miess@xxxxxxx>
commit 85e41f1ed5d94a26fe4e57003c399936d291ed70 upstream.
[Why]
RCO is causing error messages on some DCN314 systems
[How]
Force disable RCO for DCN314
Fixes: 17fbdbda9cc8 ("drm/amd/display: Enable dcn314 DPP RCO")
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
Acked-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
Signed-off-by: Daniel Miess <daniel.miess@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c | 2 +-
drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c | 4 ++++
2 files changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c
@@ -322,7 +322,7 @@ static void dccg314_dpp_root_clock_contr
{
struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
- if (dccg->dpp_clock_gated[dpp_inst] == clock_on)
+ if (dccg->dpp_clock_gated[dpp_inst] != clock_on)
return;
if (clock_on) {
--- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
@@ -1936,6 +1936,10 @@ static bool dcn314_resource_construct(
dc->debug = debug_defaults_drv;
else
dc->debug = debug_defaults_diags;
+
+ /* Disable root clock optimization */
+ dc->debug.root_clock_optimization.u32All = 0;
+
// Init the vm_helper
if (dc->vm_helper)
vm_helper_init(dc->vm_helper, 16);
Patches currently in stable-queue which might be from daniel.miess@xxxxxxx are
queue-6.4/drm-amd-display-remove-v_startup-workaround-for-dcn3.patch
queue-6.4/drm-amd-display-disable-rco-for-dcn314.patch
queue-6.4/drm-amd-display-enable-dcn314-dpp-rco.patch
