diff options
Diffstat (limited to 'SOURCES/0001-platform-x86-thinkpad_acpi-Add-support-for-dual-fan-.patch')
| -rw-r--r-- | SOURCES/0001-platform-x86-thinkpad_acpi-Add-support-for-dual-fan-.patch | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/SOURCES/0001-platform-x86-thinkpad_acpi-Add-support-for-dual-fan-.patch b/SOURCES/0001-platform-x86-thinkpad_acpi-Add-support-for-dual-fan-.patch new file mode 100644 index 0000000..4ba0393 --- /dev/null +++ b/SOURCES/0001-platform-x86-thinkpad_acpi-Add-support-for-dual-fan-.patch @@ -0,0 +1,136 @@ +From 14232c6e788cb1f7b96dbd08b077f90923324b24 Mon Sep 17 00:00:00 2001 +From: Lars Hofhansl <larsh@apache.org> +Date: Thu, 23 Apr 2020 14:57:09 -0700 +Subject: [PATCH] platform/x86: thinkpad_acpi: Add support for dual fan control + +This adds dual fan control for the following models: +P50, P51, P52, P70, P71, P72, P1 gen1, P2 gen2, X1E gen1 and X1E gen2. + +Both fans are controlled together as if they were a single fan. + +Tested on an X1 Extreme Gen1, an X1 Extreme Gen2, and a P50. + +The patch is defensive, it adds only specific supported machines, and falls +back to the old behavior if both fans cannot be controlled. + +Background: +I tested the BIOS default behavior on my X1E gen2 and both fans are always +changed together. So rather than adding controls for each fan, this controls +both fans together as the BIOS would do. + +This was inspired by a discussion on dual fan support for the thinkfan tool +(see link below). All BIOS IDs are taken from there. The X1E gen2 ID is +verified on my machine. + +Thanks to GitHub users voidworker and civic9 for the earlier patches and +BIOS IDs, and to users peter-stoll and sassman for testing the patch on +their machines. + +BugLink: https://github.com/vmatare/thinkfan/issues/58 +Signed-off-by: Lars Hofhansl <larsh@apache.org> +[andy: massaged commit message to capitalize ID and convert to BugLink] +Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> +--- + drivers/platform/x86/thinkpad_acpi.c | 43 ++++++++++++++++++++++++---- + 1 file changed, 37 insertions(+), 6 deletions(-) + +diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c +index 8eaadbaf8ffa..83b4a83da967 100644 +--- a/drivers/platform/x86/thinkpad_acpi.c ++++ b/drivers/platform/x86/thinkpad_acpi.c +@@ -318,6 +318,7 @@ static struct { + u32 uwb:1; + u32 fan_ctrl_status_undef:1; + u32 second_fan:1; ++ u32 second_fan_ctl:1; + u32 beep_needs_two_args:1; + u32 mixer_no_level_control:1; + u32 battery_force_primary:1; +@@ -8324,11 +8325,19 @@ static int fan_set_level(int level) + + switch (fan_control_access_mode) { + case TPACPI_FAN_WR_ACPI_SFAN: +- if (level >= 0 && level <= 7) { +- if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) +- return -EIO; +- } else ++ if ((level < 0) || (level > 7)) + return -EINVAL; ++ ++ if (tp_features.second_fan_ctl) { ++ if (!fan_select_fan2() || ++ !acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) { ++ pr_warn("Couldn't set 2nd fan level, disabling support\n"); ++ tp_features.second_fan_ctl = 0; ++ } ++ fan_select_fan1(); ++ } ++ if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) ++ return -EIO; + break; + + case TPACPI_FAN_WR_ACPI_FANS: +@@ -8345,6 +8354,15 @@ static int fan_set_level(int level) + else if (level & TP_EC_FAN_AUTO) + level |= 4; /* safety min speed 4 */ + ++ if (tp_features.second_fan_ctl) { ++ if (!fan_select_fan2() || ++ !acpi_ec_write(fan_status_offset, level)) { ++ pr_warn("Couldn't set 2nd fan level, disabling support\n"); ++ tp_features.second_fan_ctl = 0; ++ } ++ fan_select_fan1(); ++ ++ } + if (!acpi_ec_write(fan_status_offset, level)) + return -EIO; + else +@@ -8763,6 +8781,7 @@ static const struct attribute_group fan_attr_group = { + + #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ + #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ ++#define TPACPI_FAN_2CTL 0x0004 /* selects fan2 control */ + + static const struct tpacpi_quirk fan_quirk_table[] __initconst = { + TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1), +@@ -8771,6 +8790,13 @@ static const struct tpacpi_quirk fan_quirk_table[] __initconst = { + TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1), + TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN), + TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN), ++ TPACPI_Q_LNV3('N', '1', 'D', TPACPI_FAN_2CTL), /* P70 */ ++ TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2CTL), /* P50 */ ++ TPACPI_Q_LNV3('N', '1', 'T', TPACPI_FAN_2CTL), /* P71 */ ++ TPACPI_Q_LNV3('N', '1', 'U', TPACPI_FAN_2CTL), /* P51 */ ++ TPACPI_Q_LNV3('N', '2', 'C', TPACPI_FAN_2CTL), /* P52 / P72 */ ++ TPACPI_Q_LNV3('N', '2', 'E', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (1st gen) */ ++ TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL), /* P1 / X1 Extreme (2nd gen) */ + }; + + static int __init fan_init(struct ibm_init_struct *iibm) +@@ -8788,6 +8814,7 @@ static int __init fan_init(struct ibm_init_struct *iibm) + fan_watchdog_maxinterval = 0; + tp_features.fan_ctrl_status_undef = 0; + tp_features.second_fan = 0; ++ tp_features.second_fan_ctl = 0; + fan_control_desired_level = 7; + + if (tpacpi_is_ibm()) { +@@ -8812,8 +8839,12 @@ static int __init fan_init(struct ibm_init_struct *iibm) + fan_quirk1_setup(); + if (quirks & TPACPI_FAN_2FAN) { + tp_features.second_fan = 1; +- dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, +- "secondary fan support enabled\n"); ++ pr_info("secondary fan support enabled\n"); ++ } ++ if (quirks & TPACPI_FAN_2CTL) { ++ tp_features.second_fan = 1; ++ tp_features.second_fan_ctl = 1; ++ pr_info("secondary fan control enabled\n"); + } + } else { + pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n"); +-- +2.26.2 + |