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| author | Gayatri Kammela <gayatri.kammela@intel.com> | 2020-02-04 15:01:54 -0800 |
|---|---|---|
| committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-02-10 17:47:38 +0200 |
| commit | a45096ac70e59498ef3d1fe67ab6a10dbccf59ef (patch) | |
| tree | 07106399cb7c2bbe05667ff63a7390f911da3f6b /drivers/platform/x86/intel_pmc_core.c | |
| parent | 95b31e35239e5e1689e3d965d692a313c71bd8ab (diff) | |
| download | linux-a45096ac70e59498ef3d1fe67ab6a10dbccf59ef.tar.gz linux-a45096ac70e59498ef3d1fe67ab6a10dbccf59ef.tar.bz2 linux-a45096ac70e59498ef3d1fe67ab6a10dbccf59ef.zip | |
platform/x86: intel_pmc_core: Add debugfs entry to access sub-state residencies
Prior to Tiger Lake, the platforms that support pmc_core have no
sub-states of S0ix. Tiger Lake has 8 sub-states/low power modes of S0ix
ranging from S0i2.0-S0i2.2 and S0i3.0-S0i3.4, simply represented as
S0ix.y.
Create a debugfs entry to access residency of each sub-state.
Cc: Srinivas Pandruvada <srinivas.pandruvada@intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: David Box <david.e.box@intel.com>
Signed-off-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>
Diffstat (limited to 'drivers/platform/x86/intel_pmc_core.c')
| -rw-r--r-- | drivers/platform/x86/intel_pmc_core.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/platform/x86/intel_pmc_core.c b/drivers/platform/x86/intel_pmc_core.c index f85c112f8c2c..08aac03010c9 100644 --- a/drivers/platform/x86/intel_pmc_core.c +++ b/drivers/platform/x86/intel_pmc_core.c @@ -422,6 +422,8 @@ static const struct pmc_reg_map tgl_reg_map = { .pm_cfg_offset = CNP_PMC_PM_CFG_OFFSET, .pm_read_disable_bit = CNP_PMC_READ_DISABLE_BIT, .ltr_ignore_max = TGL_NUM_IP_IGN_ALLOWED, + .lpm_en_offset = TGL_LPM_EN_OFFSET, + .lpm_residency_offset = TGL_LPM_RESIDENCY_OFFSET, }; static inline u32 pmc_core_reg_read(struct pmc_dev *pmcdev, int reg_offset) @@ -794,6 +796,26 @@ static int pmc_core_ltr_show(struct seq_file *s, void *unused) } DEFINE_SHOW_ATTRIBUTE(pmc_core_ltr); +static int pmc_core_substate_res_show(struct seq_file *s, void *unused) +{ + struct pmc_dev *pmcdev = s->private; + u32 offset = pmcdev->map->lpm_residency_offset; + u32 lpm_en; + int index; + + lpm_en = pmc_core_reg_read(pmcdev, pmcdev->map->lpm_en_offset); + seq_printf(s, "status substate residency\n"); + for (index = 0; lpm_modes[index]; index++) { + seq_printf(s, "%7s %7s %-15u\n", + BIT(index) & lpm_en ? "Enabled" : " ", + lpm_modes[index], pmc_core_reg_read(pmcdev, offset)); + offset += 4; + } + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(pmc_core_substate_res); + static int pmc_core_pkgc_show(struct seq_file *s, void *unused) { struct pmc_dev *pmcdev = s->private; @@ -859,6 +881,12 @@ static void pmc_core_dbgfs_register(struct pmc_dev *pmcdev) debugfs_create_bool("slp_s0_dbg_latch", 0644, dir, &slps0_dbg_latch); } + + if (pmcdev->map->lpm_en_offset) { + debugfs_create_file("substate_residencies", 0444, + pmcdev->dbgfs_dir, pmcdev, + &pmc_core_substate_res_fops); + } } #else static inline void pmc_core_dbgfs_register(struct pmc_dev *pmcdev) |