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platform/x86/amd: pmc: Add a module parameter to disable workarounds

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Some users may want to live with the bugs that exist in platform
firmware and have workarounds in AMD PMC driver.

To allow them to bypass these workarounds, introduce a module
parameter.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20230120191519.15926-2-mario.limonciello@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Mario Limonciello 2023-01-20 13:15:19 -06:00 committed by Hans de Goede
parent 8e60615e89
commit 062c1394cb
1 changed files with 7 additions and 3 deletions
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10
drivers/platform/x86/amd/pmc.c
View file

@ -161,6 +161,10 @@ static bool enable_stb;
module_param(enable_stb, bool, 0644);
MODULE_PARM_DESC(enable_stb, "Enable the STB debug mechanism");
static bool disable_workarounds;
module_param(disable_workarounds, bool, 0644);
MODULE_PARM_DESC(disable_workarounds, "Disable workarounds for platform bugs");
static struct amd_pmc_dev pmc;
static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg, bool ret);
static int amd_pmc_read_stb(struct amd_pmc_dev *dev, u32 *buf);
@ -743,8 +747,8 @@ static void amd_pmc_s2idle_prepare(void)
/* Reset and Start SMU logging - to monitor the s0i3 stats */
amd_pmc_setup_smu_logging(pdev);
/* Activate CZN specific RTC functionality */
if (pdev->cpu_id == AMD_CPU_ID_CZN) {
/* Activate CZN specific platform bug workarounds */
if (pdev->cpu_id == AMD_CPU_ID_CZN && !disable_workarounds) {
rc = amd_pmc_verify_czn_rtc(pdev, &arg);
if (rc) {
dev_err(pdev->dev, "failed to set RTC: %d\n", rc);
@ -815,7 +819,7 @@ static int __maybe_unused amd_pmc_suspend_handler(struct device *dev)
{
struct amd_pmc_dev *pdev = dev_get_drvdata(dev);
if (pdev->cpu_id == AMD_CPU_ID_CZN) {
if (pdev->cpu_id == AMD_CPU_ID_CZN && !disable_workarounds) {
int rc = amd_pmc_czn_wa_irq1(pdev);
if (rc) {