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drm/xe/hwmon: expose fan speed

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Add hwmon support for fan1_input, fan2_input and fan3_input attributes,
which will expose fan speed of respective channels in RPM when supported
by hardware. With this in place we can monitor fan speed using lm-sensors
tool.

v2: Rely on platform checks instead of mailbox error (Aravind, Rodrigo)
v3: Introduce has_fan_control flag (Rodrigo)

Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250312085909.755073-1-raag.jadav@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Raag Jadav
2025-03-12 14:29:09 +05:30
committed by Rodrigo Vivi
parent 278469ff56
commit 28f79ac609
6 changed files with 160 additions and 1 deletions
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3
drivers/gpu/drm/xe/xe_pcode_api.h
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@@ -49,6 +49,9 @@
/* Domain IDs (param2) */
#define PCODE_MBOX_DOMAIN_HBM 0x2
#define FAN_SPEED_CONTROL 0x7D
#define FSC_READ_NUM_FANS 0x4
#define PCODE_SCRATCH(x) XE_REG(0x138320 + ((x) * 4))
/* PCODE_SCRATCH0 */
#define AUXINFO_REG_OFFSET REG_GENMASK(17, 15)