FAILED: patch "[PATCH] drm/amd/display: Determine IPS mode by ASIC and PMFW versions" failed to apply to 6.10-stable tree

The patch below does not apply to the 6.10-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.10.y
git checkout FETCH_HEAD
git cherry-pick -x 65444581a4aecf0e96b4691bb20fc75c602f5863
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2024090802-spill-spooky-94c0@gregkh' --subject-prefix 'PATCH 6.10.y' HEAD^..

Possible dependencies:

65444581a4ae ("drm/amd/display: Determine IPS mode by ASIC and PMFW versions") 234e94555800 ("drm/amd/display: Enable copying of bounding box data from VBIOS DMUB") afca033f10d3 ("drm/amd/display: Add periodic detection for IPS") 05c5ffaac770 ("drm/amd/display: gpuvm handling in DML21")
9ba971b25316 ("drm/amd/display: Re-enable IPS2 for static screen") 70839da63605 ("drm/amd/display: Add new DCN401 sources")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 65444581a4aecf0e96b4691bb20fc75c602f5863 Mon Sep 17 00:00:00 2001
From: Leo Li <[email protected]>
Date: Tue, 27 Aug 2024 11:29:53 -0400
Subject: [PATCH] drm/amd/display: Determine IPS mode by ASIC and PMFW versions

[Why]

DCN IPS interoperates with other system idle power features, such as Zstates.

On DCN35, there is a known issue where system Z8 + DCN IPS2 causes a hard hang. We observe this on systems where the SBIOS allows Z8.

Though there is a SBIOS fix, there's no guarantee that users will get it any time soon, or even install it. A workaround is needed to prevent this from rearing its head in the wild.

[How]

For DCN35, check the pmfw version to determine whether the SBIOS has the fix. If not, set IPS1+RCG as the deepest possible state in all cases except for s0ix and display off (DPMS). Otherwise, enable all IPS

index 983a977632ff..e6cea5b9bdb3 100644
@@ -1752,6 +1752,30 @@ static struct dml2_soc_bb *dm_dmub_get_vbios_bounding_box(struct amdgpu_device *
 	return bb;
 }
 
+static enum dmub_ips_disable_type dm_get_default_ips_mode(
+	struct amdgpu_device *adev)
+{
+	/*
+	 * On DCN35 systems with Z8 enabled, it's possible for IPS2 + Z8 to
+	 * cause a hard hang. A fix exists for newer PMFW.
+	 *
+	 * As a workaround, for non-fixed PMFW, force IPS1+RCG as the deepest
+	 * IPS state in all cases, except for s0ix and all displays off (DPMS),
+	 * where IPS2 is allowed.
+	 *
+	 * When checking pmfw version, use the major and minor only.
+	 */
+	if (amdgpu_ip_version(adev, DCE_HWIP, 0) == IP_VERSION(3, 5, 0) &&
+	    (adev->pm.fw_version & 0x00FFFF00) < 0x005D6300)
+		return DMUB_IPS_RCG_IN_ACTIVE_IPS2_IN_OFF;
+
+	if (amdgpu_ip_version(adev, DCE_HWIP, 0) >= IP_VERSION(3, 5, 0))
+		return DMUB_IPS_ENABLE;
+
+	/* ASICs older than DCN35 do not have IPSs */
+	return DMUB_IPS_DISABLE_ALL;
+}
+
 static int amdgpu_dm_init(struct amdgpu_device *adev)
 {
 	struct dc_init_data init_data;

@@ -1863,7 +1887,7 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
 	if (amdgpu_dc_debug_mask & DC_DISABLE_IPS)
 		init_data.flags.disable_ips = DMUB_IPS_DISABLE_ALL;
 	else
-		init_data.flags.disable_ips = DMUB_IPS_ENABLE;
+		init_data.flags.disable_ips = dm_get_default_ips_mode(adev);
 
 	init_data.flags.disable_ips_in_vpb = 0;