diff mbox series

[05/11] platform/x86:intel/pmc: Move get_low_power_modes function

Message ID 20230922213032.1770590-6-david.e.box@linux.intel.com
State New
Headers
Series intel_pmc: Add telemetry API to read counters |

Commit Message

David E. Box Sept. 22, 2023, 9:30 p.m. UTC 
  From: Xi Pardee <xi.pardee@intel.com>

Some platforms will have a need to retrieve the low power modes as part of
their driver initialization. As such, make the function global and call it
from the platform specific init code.

Signed-off-by: Xi Pardee <xi.pardee@intel.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
---
 drivers/platform/x86/intel/pmc/adl.c  |  2 ++
 drivers/platform/x86/intel/pmc/cnp.c  |  2 ++
 drivers/platform/x86/intel/pmc/core.c |  7 +++----
 drivers/platform/x86/intel/pmc/core.h |  1 +
 drivers/platform/x86/intel/pmc/icl.c  | 10 +++++++++-
 drivers/platform/x86/intel/pmc/mtl.c  |  4 +++-
 drivers/platform/x86/intel/pmc/spt.c  | 10 +++++++++-
 drivers/platform/x86/intel/pmc/tgl.c  |  1 +
 8 files changed, 30 insertions(+), 7 deletions(-)

Comments

Ilpo Järvinen Sept. 26, 2023, 3:56 p.m. UTC | #1 
On Fri, 22 Sep 2023, David E. Box wrote:

> From: Xi Pardee <xi.pardee@intel.com>
> 
> Some platforms will have a need to retrieve the low power modes as part of
> their driver initialization. As such, make the function global and call it
> from the platform specific init code.

What is the real justification for this change, I don't think it's clearly 
stated above?
David E. Box Sept. 27, 2023, 12:16 a.m. UTC | #2 
On Tue, 2023-09-26 at 18:56 +0300, Ilpo Järvinen wrote:
> On Fri, 22 Sep 2023, David E. Box wrote:
> 
> > From: Xi Pardee <xi.pardee@intel.com>
> > 
> > Some platforms will have a need to retrieve the low power modes as part of
> > their driver initialization. As such, make the function global and call it
> > from the platform specific init code.
> 
> What is the real justification for this change, I don't think it's clearly 
> stated above?

It needs to be moved from core code to platform init code so that (in patch 9)
we can get the entry requirement list for the enabled modes, which won't be
known before this function is ran. I'll update the changelog.
diff mbox series

Patch

diff --git a/drivers/platform/x86/intel/pmc/adl.c b/drivers/platform/x86/intel/pmc/adl.c
index 5006008e01be..64c492391ede 100644
--- a/drivers/platform/x86/intel/pmc/adl.c
+++ b/drivers/platform/x86/intel/pmc/adl.c
@@ -319,6 +319,8 @@  int adl_core_init(struct pmc_dev *pmcdev)
 	if (ret)
 		return ret;
 
+	pmc_core_get_low_power_modes(pmcdev);
+
 	/* Due to a hardware limitation, the GBE LTR blocks PC10
 	 * when a cable is attached. Tell the PMC to ignore it.
 	 */
diff --git a/drivers/platform/x86/intel/pmc/cnp.c b/drivers/platform/x86/intel/pmc/cnp.c
index 420aaa1d7c76..59298f184d0e 100644
--- a/drivers/platform/x86/intel/pmc/cnp.c
+++ b/drivers/platform/x86/intel/pmc/cnp.c
@@ -214,6 +214,8 @@  int cnp_core_init(struct pmc_dev *pmcdev)
 	if (ret)
 		return ret;
 
+	pmc_core_get_low_power_modes(pmcdev);
+
 	/* Due to a hardware limitation, the GBE LTR blocks PC10
 	 * when a cable is attached. Tell the PMC to ignore it.
 	 */
diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
index 5a36b3f77bc5..e58c8cc286a3 100644
--- a/drivers/platform/x86/intel/pmc/core.c
+++ b/drivers/platform/x86/intel/pmc/core.c
@@ -966,9 +966,8 @@  static bool pmc_core_pri_verify(u32 lpm_pri, u8 *mode_order)
 	return true;
 }
 
-static void pmc_core_get_low_power_modes(struct platform_device *pdev)
+void pmc_core_get_low_power_modes(struct pmc_dev *pmcdev)
 {
-	struct pmc_dev *pmcdev = platform_get_drvdata(pdev);
 	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
 	u8 pri_order[LPM_MAX_NUM_MODES] = LPM_DEFAULT_PRI;
 	u8 mode_order[LPM_MAX_NUM_MODES];
@@ -1000,7 +999,8 @@  static void pmc_core_get_low_power_modes(struct platform_device *pdev)
 		for (mode = 0; mode < LPM_MAX_NUM_MODES; mode++)
 			pri_order[mode_order[mode]] = mode;
 	else
-		dev_warn(&pdev->dev, "Assuming a default substate order for this platform\n");
+		dev_warn(&pmcdev->pdev->dev,
+			 "Assuming a default substate order for this platform\n");
 
 	/*
 	 * Loop through all modes from lowest to highest priority,
@@ -1250,7 +1250,6 @@  static int pmc_core_probe(struct platform_device *pdev)
 	}
 
 	pmcdev->pmc_xram_read_bit = pmc_core_check_read_lock_bit(primary_pmc);
-	pmc_core_get_low_power_modes(pdev);
 	pmc_core_do_dmi_quirks(primary_pmc);
 
 	pmc_core_dbgfs_register(pmcdev);
diff --git a/drivers/platform/x86/intel/pmc/core.h b/drivers/platform/x86/intel/pmc/core.h
index 0729f593c6a7..ccf24e0f5e50 100644
--- a/drivers/platform/x86/intel/pmc/core.h
+++ b/drivers/platform/x86/intel/pmc/core.h
@@ -490,6 +490,7 @@  extern int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value);
 
 int pmc_core_resume_common(struct pmc_dev *pmcdev);
 int get_primary_reg_base(struct pmc *pmc);
+extern void pmc_core_get_low_power_modes(struct pmc_dev *pmcdev);
 
 extern void pmc_core_ssram_init(struct pmc_dev *pmcdev);
 
diff --git a/drivers/platform/x86/intel/pmc/icl.c b/drivers/platform/x86/intel/pmc/icl.c
index d08e3174230d..71b0fd6cb7d8 100644
--- a/drivers/platform/x86/intel/pmc/icl.c
+++ b/drivers/platform/x86/intel/pmc/icl.c
@@ -53,7 +53,15 @@  const struct pmc_reg_map icl_reg_map = {
 int icl_core_init(struct pmc_dev *pmcdev)
 {
 	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
+	int ret;
 
 	pmc->map = &icl_reg_map;
-	return get_primary_reg_base(pmc);
+
+	ret = get_primary_reg_base(pmc);
+	if (ret)
+		return ret;
+
+	pmc_core_get_low_power_modes(pmcdev);
+
+	return ret;
 }
diff --git a/drivers/platform/x86/intel/pmc/mtl.c b/drivers/platform/x86/intel/pmc/mtl.c
index 2204bc666980..c3b5f4fe01d1 100644
--- a/drivers/platform/x86/intel/pmc/mtl.c
+++ b/drivers/platform/x86/intel/pmc/mtl.c
@@ -985,7 +985,7 @@  static int mtl_resume(struct pmc_dev *pmcdev)
 int mtl_core_init(struct pmc_dev *pmcdev)
 {
 	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_SOC];
-	int ret = 0;
+	int ret;
 
 	mtl_d3_fixup();
 
@@ -1002,6 +1002,8 @@  int mtl_core_init(struct pmc_dev *pmcdev)
 			return ret;
 	}
 
+	pmc_core_get_low_power_modes(pmcdev);
+
 	/* Due to a hardware limitation, the GBE LTR blocks PC10
 	 * when a cable is attached. Tell the PMC to ignore it.
 	 */
diff --git a/drivers/platform/x86/intel/pmc/spt.c b/drivers/platform/x86/intel/pmc/spt.c
index 4b6f5cbda16c..ab993a69e33e 100644
--- a/drivers/platform/x86/intel/pmc/spt.c
+++ b/drivers/platform/x86/intel/pmc/spt.c
@@ -137,7 +137,15 @@  const struct pmc_reg_map spt_reg_map = {
 int spt_core_init(struct pmc_dev *pmcdev)
 {
 	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_MAIN];
+	int ret;
 
 	pmc->map = &spt_reg_map;
-	return get_primary_reg_base(pmc);
+
+	ret = get_primary_reg_base(pmc);
+	if (ret)
+		return ret;
+
+	pmc_core_get_low_power_modes(pmcdev);
+
+	return ret;
 }
diff --git a/drivers/platform/x86/intel/pmc/tgl.c b/drivers/platform/x86/intel/pmc/tgl.c
index 2449940102db..d5f1d2223c5a 100644
--- a/drivers/platform/x86/intel/pmc/tgl.c
+++ b/drivers/platform/x86/intel/pmc/tgl.c
@@ -263,6 +263,7 @@  int tgl_core_init(struct pmc_dev *pmcdev)
 	if (ret)
 		return ret;
 
+	pmc_core_get_low_power_modes(pmcdev);
 	pmc_core_get_tgl_lpm_reqs(pmcdev->pdev);
 	/* Due to a hardware limitation, the GBE LTR blocks PC10
 	 * when a cable is attached. Tell the PMC to ignore it.