Patch "platform/x86/amd/pmf: Fix CnQF and auto-mode after resume" has been added to the 6.3-stable tree

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This is a note to let you know that I've just added the patch titled

    platform/x86/amd/pmf: Fix CnQF and auto-mode after resume

to the 6.3-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:
     platform-x86-amd-pmf-fix-cnqf-and-auto-mode-after-re.patch
and it can be found in the queue-6.3 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit b04a6c6a55ba9b6e3b96805cc81ff6c04b45b3ab
Author: Mario Limonciello <mario.limonciello@xxxxxxx>
Date:   Fri May 12 20:14:08 2023 -0500

    platform/x86/amd/pmf: Fix CnQF and auto-mode after resume
    
    [ Upstream commit b54147fa374dbeadcb01b1762db1a793e06e37de ]
    
    After suspend/resume cycle there is an error message and auto-mode
    or CnQF stops working.
    
    [ 5741.447511] amd-pmf AMDI0100:00: SMU cmd failed. err: 0xff
    [ 5741.447523] amd-pmf AMDI0100:00: AMD_PMF_REGISTER_RESPONSE:ff
    [ 5741.447527] amd-pmf AMDI0100:00: AMD_PMF_REGISTER_ARGUMENT:7
    [ 5741.447531] amd-pmf AMDI0100:00: AMD_PMF_REGISTER_MESSAGE:16
    [ 5741.447540] amd-pmf AMDI0100:00: [AUTO_MODE] avg power: 0 mW mode: QUIET
    
    This is because the DRAM address used for accessing metrics table
    needs to be refreshed after a suspend resume cycle. Add a resume
    callback to reset this again.
    
    Fixes: 1a409b35c995 ("platform/x86/amd/pmf: Get performance metrics from PMFW")
    Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
    Link: https://lore.kernel.org/r/20230513011408.958-1-mario.limonciello@xxxxxxx
    Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>
    Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/platform/x86/amd/pmf/core.c b/drivers/platform/x86/amd/pmf/core.c
index 0acc0b6221290..dc9803e1a4b9b 100644
--- a/drivers/platform/x86/amd/pmf/core.c
+++ b/drivers/platform/x86/amd/pmf/core.c
@@ -245,24 +245,29 @@ static const struct pci_device_id pmf_pci_ids[] = {
 	{ }
 };
 
-int amd_pmf_init_metrics_table(struct amd_pmf_dev *dev)
+static void amd_pmf_set_dram_addr(struct amd_pmf_dev *dev)
 {
 	u64 phys_addr;
 	u32 hi, low;
 
-	INIT_DELAYED_WORK(&dev->work_buffer, amd_pmf_get_metrics);
+	phys_addr = virt_to_phys(dev->buf);
+	hi = phys_addr >> 32;
+	low = phys_addr & GENMASK(31, 0);
+
+	amd_pmf_send_cmd(dev, SET_DRAM_ADDR_HIGH, 0, hi, NULL);
+	amd_pmf_send_cmd(dev, SET_DRAM_ADDR_LOW, 0, low, NULL);
+}
 
+int amd_pmf_init_metrics_table(struct amd_pmf_dev *dev)
+{
 	/* Get Metrics Table Address */
 	dev->buf = kzalloc(sizeof(dev->m_table), GFP_KERNEL);
 	if (!dev->buf)
 		return -ENOMEM;
 
-	phys_addr = virt_to_phys(dev->buf);
-	hi = phys_addr >> 32;
-	low = phys_addr & GENMASK(31, 0);
+	INIT_DELAYED_WORK(&dev->work_buffer, amd_pmf_get_metrics);
 
-	amd_pmf_send_cmd(dev, SET_DRAM_ADDR_HIGH, 0, hi, NULL);
-	amd_pmf_send_cmd(dev, SET_DRAM_ADDR_LOW, 0, low, NULL);
+	amd_pmf_set_dram_addr(dev);
 
 	/*
 	 * Start collecting the metrics data after a small delay
@@ -273,6 +278,18 @@ int amd_pmf_init_metrics_table(struct amd_pmf_dev *dev)
 	return 0;
 }
 
+static int amd_pmf_resume_handler(struct device *dev)
+{
+	struct amd_pmf_dev *pdev = dev_get_drvdata(dev);
+
+	if (pdev->buf)
+		amd_pmf_set_dram_addr(pdev);
+
+	return 0;
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(amd_pmf_pm, NULL, amd_pmf_resume_handler);
+
 static void amd_pmf_init_features(struct amd_pmf_dev *dev)
 {
 	int ret;
@@ -414,6 +431,7 @@ static struct platform_driver amd_pmf_driver = {
 		.name = "amd-pmf",
 		.acpi_match_table = amd_pmf_acpi_ids,
 		.dev_groups = amd_pmf_driver_groups,
+		.pm = pm_sleep_ptr(&amd_pmf_pm),
 	},
 	.probe = amd_pmf_probe,
 	.remove = amd_pmf_remove,



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