From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
Enric Balletbo i Serra <enric.balletbo@collabora.com>,
Daniel Thompson <daniel.thompson@linaro.org>,
Jingoo Han <jingoohan1@gmail.com>,
Thierry Reding <thierry.reding@gmail.com>,
Lee Jones <lee.jones@linaro.org>, Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH 4.14 39/41] pwm-backlight: Enable/disable the PWM before/after LCD enable toggle.
Date: Tue, 26 Mar 2019 15:30:16 +0900 [thread overview]
Message-ID: <20190326042652.013337030@linuxfoundation.org> (raw)
In-Reply-To: <20190326042649.889479098@linuxfoundation.org>
4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Enric Balletbo i Serra <enric.balletbo@collabora.com>
commit 5fb5caee92ba35a4a3baa61d45a78eb057e2c031 upstream.
Before this patch the enable signal was set before the PWM signal and
vice-versa on power off. This sequence is wrong, at least, it is on
the different panels datasheets that I checked, so I inverted the sequence
to follow the specs.
For reference the following panels have the mentioned sequence:
- N133HSE-EA1 (Innolux)
- N116BGE (Innolux)
- N156BGE-L21 (Innolux)
- B101EAN0 (Auo)
- B101AW03 (Auo)
- LTN101NT05 (Samsung)
- CLAA101WA01A (Chunghwa)
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/video/backlight/pwm_bl.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -54,10 +54,11 @@ static void pwm_backlight_power_on(struc
if (err < 0)
dev_err(pb->dev, "failed to enable power supply\n");
+ pwm_enable(pb->pwm);
+
if (pb->enable_gpio)
gpiod_set_value_cansleep(pb->enable_gpio, 1);
- pwm_enable(pb->pwm);
pb->enabled = true;
}
@@ -66,12 +67,12 @@ static void pwm_backlight_power_off(stru
if (!pb->enabled)
return;
- pwm_config(pb->pwm, 0, pb->period);
- pwm_disable(pb->pwm);
-
if (pb->enable_gpio)
gpiod_set_value_cansleep(pb->enable_gpio, 0);
+ pwm_config(pb->pwm, 0, pb->period);
+ pwm_disable(pb->pwm);
+
regulator_disable(pb->power_supply);
pb->enabled = false;
}
next prev parent reply other threads:[~2019-03-26 6:35 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-26 6:29 [PATCH 4.14 00/41] 4.14.109-stable review Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 01/41] mmc: pxamci: fix enum type confusion Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 02/41] drm/vmwgfx: Dont double-free the mode stored in par->set_mode Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 03/41] iommu/amd: fix sg->dma_address for sg->offset bigger than PAGE_SIZE Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 04/41] libceph: wait for latest osdmap in ceph_monc_blacklist_add() Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 05/41] udf: Fix crash on IO error during truncate Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 06/41] mips: loongson64: lemote-2f: Add IRQF_NO_SUSPEND to "cascade" irqaction Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 07/41] MIPS: Ensure ELF appended dtb is relocated Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 08/41] MIPS: Fix kernel crash for R6 in jump label branch function Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 09/41] scsi: ibmvscsi: Protect ibmvscsi_head from concurrent modificaiton Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 10/41] scsi: ibmvscsi: Fix empty event pool access during host removal Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 11/41] futex: Ensure that futex address is aligned in handle_futex_death() Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 12/41] perf probe: Fix getting the kernel map Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 13/41] objtool: Move objtool_file struct off the stack Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 14/41] ALSA: x86: Fix runtime PM for hdmi-lpe-audio Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 15/41] ext4: fix NULL pointer dereference while journal is aborted Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 16/41] ext4: fix data corruption caused by unaligned direct AIO Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 17/41] ext4: brelse all indirect buffer in ext4_ind_remove_space() Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 18/41] media: v4l2-ctrls.c/uvc: zero v4l2_event Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 19/41] Bluetooth: hci_uart: Check if socket buffer is ERR_PTR in h4_recv_buf() Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 20/41] Bluetooth: Fix decrementing reference count twice in releasing socket Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 21/41] Bluetooth: hci_ldisc: Initialize hci_dev before open() Greg Kroah-Hartman
2019-03-26 6:29 ` [PATCH 4.14 22/41] Bluetooth: hci_ldisc: Postpone HCI_UART_PROTO_READY bit set in hci_uart_set_proto() Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 23/41] drm: Reorder set_property_atomic to avoid returning with an active ww_ctx Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 24/41] netfilter: ebtables: remove BUGPRINT messages Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 25/41] x86/unwind: Handle NULL pointer calls better in frame unwinder Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 26/41] x86/unwind: Add hardcoded ORC entry for NULL Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 27/41] locking/lockdep: Add debug_locks check in __lock_downgrade() Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 28/41] mm, mempolicy: fix uninit memory access Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 29/41] ALSA: hda - Record the current power state before suspend/resume calls Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 30/41] ALSA: hda - Enforces runtime_resume after S3 and S4 for each codec Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 31/41] lib/int_sqrt: optimize small argument Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 32/41] USB: core: only clean up what we allocated Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 33/41] scsi: ufs: fix wrong command type of UTRD for UFSHCI v2.1 Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 34/41] PCI: designware-ep: dw_pcie_ep_set_msi() should only set MMC bits Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 35/41] PCI: designware-ep: Read-only registers need DBI_RO_WR_EN to be writable Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 36/41] PCI: endpoint: Use EPCs device in dma_alloc_coherent()/dma_free_coherent() Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 37/41] rtc: Fix overflow when converting time64_t to rtc_time Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 38/41] sched/cpufreq/schedutil: Fix error path mutex unlock Greg Kroah-Hartman
2019-03-26 6:30 ` Greg Kroah-Hartman [this message]
2019-03-26 6:30 ` [PATCH 4.14 40/41] power: supply: charger-manager: Fix incorrect return value Greg Kroah-Hartman
2019-03-26 6:30 ` [PATCH 4.14 41/41] ath10k: avoid possible string overflow Greg Kroah-Hartman
2019-03-26 10:23 ` [PATCH 4.14 00/41] 4.14.109-stable review kernelci.org bot
2019-03-26 15:19 ` Jon Hunter
2019-03-26 16:39 ` Naresh Kamboju
2019-03-26 17:49 ` Guenter Roeck
2019-03-26 23:15 ` shuah
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