Hi All,
So the bug-fix which prompted v8, lead to some discussion about the pwm-lpss suspend/resume code. So as discussed this version drops the following 2 patches:
[PATCH v8 06/17] pwm: lpss: Use pwm_lpss_restore() when restoring state on resume [PATCH v8 07/17] pwm: lpss: Always update state and set update bit
Replacing them with:
[PATCH v9 06/17] pwm: lpss: Make pwm_lpss_apply() not rely on hardware state [PATCH v9 07/17] pwm: lpss: Remove suspend/resume handlers
Andy, Thierry, can you review these 2 new patches please?
The plan still is to push the entire series to drm-intel-next-queued (because of interdependencies) once the 2 new patches are reviewed and the series has passed CI.
This series has been tested (and re-tested after adding various bug-fixes) extensively. It has been tested on the following devices:
-Asus T100TA BYT + CRC-PMIC PWM -Toshiba WT8-A BYT + CRC-PMIC PWM -Thundersoft TS178 BYT + CRC-PMIC PWM, inverse PWM -Asus T100HA CHT + CRC-PMIC PWM -Terra Pad 1061 BYT + LPSS PWM -Trekstor Twin 10.1 BYT + LPSS PWM -Asus T101HA CHT + LPSS PWM -GPD Pocket CHT + LPSS PWM -Acer One S1003 CHT + LPSS PWM
Regards,
Hans
Changelog:
Changes in v9: - Replace: [PATCH v8 06/17] pwm: lpss: Use pwm_lpss_restore() when restoring state on resume [PATCH v8 07/17] pwm: lpss: Always update state and set update bit with: [PATCH v9 06/17] pwm: lpss: Make pwm_lpss_apply() not rely on hardware state [PATCH v9 07/17] pwm: lpss: Remove suspend/resume handlers
Changes in v8: - Add a new patch dealing with the ACPI/DSDT GFX0._PS3 code poking the PWM controller in unexpected ways on some Cherry Trail devices
Changes in v7: - Fix a u64 divide leading to undefined reference to `__udivdi3' errors on 32 bit platforms by casting the divisor to an unsigned long
Changes in v6: - Rebase on v5.9-rc1 - Adjust pwm-crc patches for pwm_state.period and .duty_cycle now being u64
Changes in v5: - Dropped the "pwm: lpss: Correct get_state result for base_unit == 0" patch. The base_unit == 0 condition should never happen and sofar it is unclear what the proper behavior / correct values to store in the pwm_state should be when this does happen. Since this patch was added as an extra pwm-lpss fix in v4 of this patch-set and otherwise is orthogonal to the of this patch-set just drop it (again). - "[PATCH 04/16] pwm: lpss: Add range limit check for the base_unit register value" - Use clamp_val(... instead of clam_t(unsigned long long, ... - "[PATCH 05/16] pwm: lpss: Add pwm_lpss_prepare_enable() helper" - This is a new patch in v5 of this patchset - [PATCH 06/16] pwm: lpss: Use pwm_lpss_apply() when restoring state on resume - Use the new pwm_lpss_prepare_enable() helper
Changes in v4: - "[PATCH v4 06/16] pwm: lpss: Correct get_state result for base_unit == 0" - This is a new patch in v4 of this patchset - "[PATCH v4 12/16] pwm: crc: Implement get_state() method" - Use DIV_ROUND_UP when calculating the period and duty_cycle values - "[PATCH v4 16/16] drm/i915: panel: Use atomic PWM API for devs with an external PWM controller" - Add a note to the commit message about the changes in pwm_disable_backlight() - Use the pwm_set/get_relative_duty_cycle() helpers
Changes in v3: - "[PATCH v3 04/15] pwm: lpss: Add range limit check for the base_unit register value" - Use base_unit_range - 1 as maximum value for the clamp() - "[PATCH v3 05/15] pwm: lpss: Use pwm_lpss_apply() when restoring state on resume" - This replaces the "pwm: lpss: Set SW_UPDATE bit when enabling the PWM" patch from previous versions of this patch-set, which really was a hack working around the resume issue which this patch fixes properly. - PATCH v3 6 - 11 pwm-crc changes: - Various small changes resulting from the reviews by Andy and Uwe, including some refactoring of the patches to reduce the amount of churn in the patch-set
Changes in v2: - Fix coverletter subject - Drop accidentally included debugging patch - "[PATCH v3 02/15] ACPI / LPSS: Save Cherry Trail PWM ctx registers only once ( - Move #define LPSS_SAVE_CTX_ONCE define to group it with LPSS_SAVE_CTX