From: Mario Limonciello <mario.limonciello@amd.com>
Date: Mon, 10 Apr 2023 00:23:43 +0530
Subject: [PATCH] platform/x86/amd: pmc: Don't dump data after resume from s0i3
 on picasso
References: bsc#1012628
Patch-mainline: 6.3.2
Git-commit: 7abc3618b65304d409d9489d77e4a8f047842fb7

[ Upstream commit 7abc3618b65304d409d9489d77e4a8f047842fb7 ]

This command isn't supported on Picasso, so guard against running it
to avoid errors like `SMU cmd unknown. err: 0xfe` in the logs.

Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2449
Fixes: 766205674962 ("platform/x86: amd-pmc: Add support for logging SMU metrics")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20230409185348.556161-4-Shyam-sundar.S-k@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/platform/x86/amd/pmc.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/amd/pmc.c b/drivers/platform/x86/amd/pmc.c
index 6aa10192..d6527dea 100644
--- a/drivers/platform/x86/amd/pmc.c
+++ b/drivers/platform/x86/amd/pmc.c
@@ -834,6 +834,14 @@ static void amd_pmc_s2idle_check(void)
 		dev_err(pdev->dev, "error writing to STB: %d\n", rc);
 }
 
+static int amd_pmc_dump_data(struct amd_pmc_dev *pdev)
+{
+	if (pdev->cpu_id == AMD_CPU_ID_PCO)
+		return -ENODEV;
+
+	return amd_pmc_send_cmd(pdev, 0, NULL, SMU_MSG_LOG_DUMP_DATA, 0);
+}
+
 static void amd_pmc_s2idle_restore(void)
 {
 	struct amd_pmc_dev *pdev = &pmc;
@@ -846,7 +854,7 @@ static void amd_pmc_s2idle_restore(void)
 		dev_err(pdev->dev, "resume failed: %d\n", rc);
 
 	/* Let SMU know that we are looking for stats */
-	amd_pmc_send_cmd(pdev, 0, NULL, SMU_MSG_LOG_DUMP_DATA, 0);
+	amd_pmc_dump_data(pdev);
 
 	rc = amd_pmc_write_stb(pdev, AMD_PMC_STB_S2IDLE_RESTORE);
 	if (rc)
-- 
2.35.3