diff options
author | Riana Tauro <riana.tauro@intel.com> | 2022-09-09 12:57:43 +0530 |
---|---|---|
committer | Ashutosh Dixit <ashutosh.dixit@intel.com> | 2022-09-09 12:40:34 -0700 |
commit | 60aad8d8c429f132640e969bc367c49abe9169f4 (patch) | |
tree | a7c9fb948c783d5177a9aa20e2ca47689ba6da89 /lib/igt_pm.c | |
parent | 7d91a6952dadaa9001b662ed60c08ccb8364929d (diff) |
lib/igt_pm : Add pm functions for d3cold_allowed
Add functions to set/get d3cold_allowed attribute of
the pci_device
v2 : Add forward declaration in header (Anshuman)
Signed-off-by: Riana Tauro <riana.tauro@intel.com>
Reviewed-by: Anshuman Gupta <anshuman.gupta@intel.com>
Diffstat (limited to 'lib/igt_pm.c')
-rw-r--r-- | lib/igt_pm.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/lib/igt_pm.c b/lib/igt_pm.c index 99251b40b..edebfdec3 100644 --- a/lib/igt_pm.c +++ b/lib/igt_pm.c @@ -38,6 +38,7 @@ #include <dirent.h> #include "drmtest.h" +#include "igt_device_scan.h" #include "igt_kms.h" #include "igt_pm.h" #include "igt_aux.h" @@ -1122,6 +1123,52 @@ void igt_pm_setup_pci_card_runtime_pm(struct pci_device *pci_dev) igt_pm_setup_pci_card_power_attrs(pci_dev, true, 0); } +/** + * igt_pm_get_d3cold_allowed: + * @igt_device_card: device card + * @val: value to be read into + * + * Reads the value of d3cold_allowed attribute + * of the pci device + */ +void igt_pm_get_d3cold_allowed(struct igt_device_card *card, char *val) +{ + char name[PATH_MAX]; + int fd; + + snprintf(name, PATH_MAX, "/sys/bus/pci/devices/%s", + card->pci_slot_name); + + fd = open(name, O_RDONLY); + igt_assert_f(fd >= 0, "Can't open %s\n", name); + + igt_sysfs_read(fd, "d3cold_allowed", val, sizeof(val)); + + close(fd); +} + +/** + * igt_pm_get_d3cold_allowed: + * @igt_device_card: device card + * @val: value to be written + * + * writes the value to d3cold_allowed attribute of pci device + */ +void igt_pm_set_d3cold_allowed(struct igt_device_card *card, const char *val) +{ + char name[PATH_MAX]; + int fd; + + snprintf(name, PATH_MAX, "/sys/bus/pci/devices/%s", + card->pci_slot_name); + + fd = open(name, O_RDONLY); + igt_assert_f(fd >= 0, "Can't open %s\n", name); + + igt_sysfs_write(fd, "d3cold_allowed", val, sizeof(val)); + close(fd); +} + static void igt_pm_restore_power_attr(struct pci_device *pci_dev, const char *attr, char *val, int len) { |