From: Gayatri Kammela <gayatri.kammela@intel.com>
Date: Tue, 4 Feb 2020 15:01:59 -0800
Subject: platform/x86: intel_pmc_core: Dump low power status registers on an
 S0ix.y failure
Git-commit: 2e36ac08a98829b132a9d0bf1ca281af1a931747
Patch-mainline: 5.7-rc1
References: jsc#SLE-12699

Platforms prior to Tiger Lake has no sub-states of S0ix and accessing
device PM states that are latched whenever there is a PC10 entry is
possible with the help of slp_s0_debug_status and slp_s0_dbg_latch
debugfs entries.

If a platform has sub-states of S0ix, no such entries are created.
Hence, dump low power status registers on resume When any attempt to
enter any low power state was unsuccessful.

Cc: Srinivas Pandruvada <srinivas.pandruvada@intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: David Box <david.e.box@intel.com>
Suggested-by: David Box <david.e.box@intel.com>
Signed-off-by: Gayatri Kammela <gayatri.kammela@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/platform/x86/intel_pmc_core.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/platform/x86/intel_pmc_core.c
+++ b/drivers/platform/x86/intel_pmc_core.c
@@ -1031,6 +1031,8 @@ static inline bool pmc_core_is_s0ix_fail
 static int pmc_core_resume(struct device *dev)
 {
 	struct pmc_dev *pmcdev = dev_get_drvdata(dev);
+	const struct pmc_bit_map **maps = pmcdev->map->lpm_sts;
+	int offset = pmcdev->map->lpm_status_offset;
 
 	if (!pmcdev->check_counters)
 		return 0;
@@ -1050,6 +1052,8 @@ static int pmc_core_resume(struct device
 		 pmcdev->s0ix_counter);
 	if (pmcdev->map->slps0_dbg_maps)
 		pmc_core_slps0_display(pmcdev, dev, NULL);
+	if (pmcdev->map->lpm_sts)
+		pmc_core_lpm_display(pmcdev, dev, NULL, offset, "STATUS", maps);
 
 	return 0;
 }