Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=linux-5.11.y 2021-05-12T06:37:22+00:00 2021-05-12T06:37:22+00:00 Kiran Gunda kgunda@codeaurora.org 2021-03-18T12:39:39+00:00 urn:sha1:7b2fb05c60986fc204136a24777db8243c70dab8 [ Upstream commit 4d6e9cdff7fbb6bef3e5559596fab3eeffaf95ca ] Currently, for WLED5, the FSC (Full scale current) setting is not updated properly due to driver toggling the wrong register after an FSC update. On WLED5 we should only toggle the MOD_SYNC bit after a brightness update. For an FSC update we need to toggle the SYNC bits instead. Fix it by adopting the common wled3_sync_toggle() for WLED5 and introducing new code to the brightness update path to compensate. Signed-off-by: Kiran Gunda <kgunda@codeaurora.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org> 2021-05-12T06:37:22+00:00 Obeida Shamoun oshmoun100@googlemail.com 2021-03-14T10:11:10+00:00 urn:sha1:416f6c34fe0e036412589f5397fe03655c5c0254 [ Upstream commit cdfd4c689e2a52c313b35ddfc1852ff274f91acb ] WLED3_SINK_REG_SYNC is, as the name implies, a sink register offset. Therefore, use the sink address as base instead of the ctrl address. This fixes the sync toggle on wled4, which can be observed by the fact that adjusting brightness now works. It has no effect on wled3 because sink and ctrl base addresses are the same. This allows adjusting the brightness without having to disable then reenable the module. Signed-off-by: Obeida Shamoun <oshmoun100@googlemail.com> Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org> Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Acked-by: Kiran Gunda <kgunda@codeaurora.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org> 2020-11-04T15:54:57+00:00 Alexandru Stan amstan@chromium.org 2020-10-22T05:04:45+00:00 urn:sha1:789eb04b6c569e3e5007afd040bef5d7216d2f3a The previous behavior was a little unexpected, its properties/problems: 1. It was designed to generate strictly increasing values (no repeats) 2. It had quantization errors when calculating step size. Resulting in unexpected jumps near the end of some segments. Example settings: brightness-levels = <0 1 2 4 8 16 32 64 128 256>; num-interpolated-steps = <16>; Whenever num-interpolated-steps was larger than the distance between 2 consecutive brightness levels the table would get really discontinuous. The slope of the interpolation would stick with integers only and if it was 0 the whole line segment would get skipped. The distances between 1 2 4 and 8 would be 1 (property #1 fighting us), and only starting with 16 it would start to interpolate properly. Property #1 is not enough. The goal here is more than just monotonically increasing. We should still care about the shape of the curve. Repeated points might be desired if we're in the part of the curve where we want to go slow (aka slope near 0). Problem #2 is plainly a bug. Imagine if the 64 entry was 63 instead, the calculated slope on the 32-63 segment will be almost half as it should be. The most expected and simplest algorithm for interpolation is linear interpolation, which would handle both problems. Let's just implement that! Take pairs of points from the brightness-levels array and linearly interpolate between them. On the X axis (what userspace sees) we'll now have equally sized intervals (num-interpolated-steps sized, as opposed to before where we were at the mercy of quantization). Signed-off-by: Alexandru Stan <amstan@chromium.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> 2020-10-14T22:59:42+00:00 Linus Torvalds torvalds@linux-foundation.org 2020-10-14T22:59:42+00:00 urn:sha1:6448cbf662c7858c0d9eb0b135962bedd6d0b9a0 Pull backlight updates from Lee Jones: "New Drivers: - Add support for KTD253 Fix-ups: - Add Device Tree documentation; common, kinetic,ktd253 - Use correct header(s); tosa_lcd, tosa_bl Bug Fixes: - Fix refcount imbalance; sky81452-backlight" * tag 'backlight-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight: backlight: tosa_bl: Include the right header backlight: tosa_lcd: Include the right header backlight: Add Kinetic KTD253 backlight driver dt-bindings: backlight: Add Kinetic KTD253 bindings dt-bindings: backlight: Add some common backlight properties backlight: sky81452-backlight: Fix refcount imbalance on error 2020-09-08T11:31:19+00:00 Linus Walleij linus.walleij@linaro.org 2020-08-26T07:05:40+00:00 urn:sha1:97ecfda1a8ffc5ffc9681d0dfa65fd5b39839dfe The Tosa backlight driver was converted to use GPIO descriptors in 0b0cb52bd80eda76c4b9921f5cf9c1b709d44e83 ("video: backlight: tosa: Use GPIO lookup table") but still includes <linux/gpio.h> rather than <linux/gpio/consumer.h>. Fix it. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> 2020-09-08T11:30:02+00:00 Linus Walleij linus.walleij@linaro.org 2020-08-26T07:09:17+00:00 urn:sha1:a47a2b98f341679807e6c64b520391f3630e8804 The Tosa backlight LCDE driver was converted to use GPIO descriptors in 0b0cb52bd80eda76c4b9921f5cf9c1b709d44e83 ("video: backlight: tosa: Use GPIO lookup table") but still includes <linux/gpio.h> rather than <linux/gpio/consumer.h>. Fix it. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> 2020-08-28T10:48:04+00:00 Linus Walleij linus.walleij@linaro.org 2020-08-19T20:51:50+00:00 urn:sha1:5317f37e48b953be94bfdbb6474542363467c37e The Kinetic KTD253 backlight driver is controlled with a single GPIO line, but still supports a range of brightness settings by sending fast pulses on the line. This is based off the source code release for the Samsung GT-S7710 mobile phone. Cc: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> 2020-08-28T09:25:54+00:00 dinghao.liu@zju.edu.cn dinghao.liu@zju.edu.cn 2020-08-20T06:38:17+00:00 urn:sha1:b7a4f80bc316a56d6ec8750e93e66f42431ed960 When of_property_read_u32_array() returns an error code, a pairing refcount decrement is needed to keep np's refcount balanced. Fixes: f705806c9f355 ("backlight: Add support Skyworks SKY81452 backlight driver") Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> 2020-08-23T22:36:59+00:00 Gustavo A. R. Silva gustavoars@kernel.org 2020-08-23T22:36:59+00:00 urn:sha1:df561f6688fef775baa341a0f5d960becd248b11 Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> 2020-08-14T23:00:09+00:00 Linus Torvalds torvalds@linux-foundation.org 2020-08-14T23:00:09+00:00 urn:sha1:fded09198826b2998242ed2e1a16527849884d3f Pull pwm updates from Thierry Reding: "The majority of this batch is conversion of the PWM period and duty cycle to 64-bit unsigned integers, which is required so that some types of hardware can generate the full range of signals that they're capable of. The remainder is mostly minor fixes and cleanups" * tag 'pwm/for-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: pwm: bcm-iproc: handle clk_get_rate() return pwm: Replace HTTP links with HTTPS ones pwm: omap-dmtimer: Repair pwm_omap_dmtimer_chip's broken kerneldoc header pwm: mediatek: Provide missing kerneldoc description for 'soc' arg pwm: bcm-kona: Remove impossible comparison when validating duty cycle pwm: bcm-iproc: Remove impossible comparison when validating duty cycle pwm: iqs620a: Use lowercase hexadecimal literals for consistency pwm: Convert period and duty cycle to u64 clk: pwm: Use 64-bit division function backlight: pwm_bl: Use 64-bit division function pwm: sun4i: Use nsecs_to_jiffies to avoid a division pwm: sifive: Use 64-bit division macro pwm: iqs620a: Use 64-bit division pwm: imx27: Use 64-bit division macro pwm: imx-tpm: Use 64-bit division macro pwm: clps711x: Use 64-bit division macro hwmon: pwm-fan: Use 64-bit division macro drm/i915: Use 64-bit division macro