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FAILED: patch "[PATCH] serial: 8250_dw: handle reset control deassert error" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x daeb4037adf7d3349b4a1fb792f4bc9824686a4b # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025102701-scabby-entrust-a162@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From daeb4037adf7d3349b4a1fb792f4bc9824686a4b Mon Sep 17 00:00:00 2001 From: Artem Shimko <a.shimko.dev(a)gmail.com> Date: Sun, 19 Oct 2025 12:51:31 +0300 Subject: [PATCH] serial: 8250_dw: handle reset control deassert error Check the return value of reset_control_deassert() in the probe function to prevent continuing probe when reset deassertion fails. Previously, reset_control_deassert() was called without checking its return value, which could lead to probe continuing even when the device reset wasn't properly deasserted. The fix checks the return value and returns an error with dev_err_probe() if reset deassertion fails, providing better error handling and diagnostics. Fixes: acbdad8dd1ab ("serial: 8250_dw: simplify optional reset handling") Cc: stable <stable(a)kernel.org> Signed-off-by: Artem Shimko <a.shimko.dev(a)gmail.com> Link: https://patch.msgid.link/20251019095131.252848-1-a.shimko.dev@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index a53ba04d9770..710ae4d40aec 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -635,7 +635,9 @@ static int dw8250_probe(struct platform_device *pdev) if (IS_ERR(data->rst)) return PTR_ERR(data->rst); - reset_control_deassert(data->rst); + err = reset_control_deassert(data->rst); + if (err) + return dev_err_probe(dev, err, "failed to deassert resets\n"); err = devm_add_action_or_reset(dev, dw8250_reset_control_assert, data->rst); if (err)

1 week, 4 days

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[PATCH 03/25] media: i2c: ov01a10: Fix gain range

by Hans de Goede

A maximum gain of 0xffff / 65525 seems unlikely and testing indeed shows that the gain control wraps-around at 4096, so set the maximum gain to 0xfff / 4095. The minimum gain of 0x100 is correct. Setting bits 8-11 to 0x0 results in the same gain values as setting these bits to 0x1, with bits 0-7 still increasing the gain when going from 0x000 - 0x0ff in the exact same range as when going from 0x100 - 0x1ff. Fixes: 0827b58dabff ("media: i2c: add ov01a10 image sensor driver") Cc: stable(a)vger.kernel.org Signed-off-by: Hans de Goede <hansg(a)kernel.org> --- drivers/media/i2c/ov01a10.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/i2c/ov01a10.c b/drivers/media/i2c/ov01a10.c index 0b1a1ecfffd0..95d6a0f046a0 100644 --- a/drivers/media/i2c/ov01a10.c +++ b/drivers/media/i2c/ov01a10.c @@ -48,7 +48,7 @@ /* analog gain controls */ #define OV01A10_REG_ANALOG_GAIN 0x3508 #define OV01A10_ANAL_GAIN_MIN 0x100 -#define OV01A10_ANAL_GAIN_MAX 0xffff +#define OV01A10_ANAL_GAIN_MAX 0xfff #define OV01A10_ANAL_GAIN_STEP 1 /* digital gain controls */ -- 2.51.0

1 week, 4 days

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[PATCH 02/25] media: i2c: ov01a10: Fix reported pixel-rate value

by Hans de Goede

CSI lanes are double-clocked so with a single lane at 400MHZ the resulting pixel-rate for 10-bits pixels is 400 MHz * 2 / 10 = 80 MHz, not 40 MHz. This also matches with the observed frame-rate of 60 fps with the default vblank setting: 80000000 / (1488 * 896) = 60. Fixes: 0827b58dabff ("media: i2c: add ov01a10 image sensor driver") Cc: stable(a)vger.kernel.org Signed-off-by: Hans de Goede <hansg(a)kernel.org> --- drivers/media/i2c/ov01a10.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/i2c/ov01a10.c b/drivers/media/i2c/ov01a10.c index e5df01f97978..0b1a1ecfffd0 100644 --- a/drivers/media/i2c/ov01a10.c +++ b/drivers/media/i2c/ov01a10.c @@ -16,7 +16,7 @@ #include <media/v4l2-fwnode.h> #define OV01A10_LINK_FREQ_400MHZ 400000000ULL -#define OV01A10_SCLK 40000000LL +#define OV01A10_SCLK 80000000LL #define OV01A10_DATA_LANES 1 #define OV01A10_REG_CHIP_ID 0x300a -- 2.51.0

1 week, 4 days

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[PATCH 01/25] media: i2c: ov01a10: Fix the horizontal flip control

by Hans de Goede

During sensor calibration I noticed that with the hflip control set to false/disabled the image was mirrored. So it seems that the horizontal flip control is inverted and needs to be set to 1 to not flip (just like the similar problem recently fixed on the ov08x40 sensor). Invert the hflip control to fix the sensor mirroring by default. As the comment above the newly added OV01A10_MEDIA_BUS_FMT define explains the control being inverted also means that the native Bayer-order of the sensor actually is GBRG not BGGR, but so as to not break userspace the Bayer-order is kept at BGGR. Fixes: 0827b58dabff ("media: i2c: add ov01a10 image sensor driver") Cc: stable(a)vger.kernel.org Signed-off-by: Hans de Goede <hansg(a)kernel.org> --- drivers/media/i2c/ov01a10.c | 25 +++++++++++++++++-------- 1 file changed, 17 insertions(+), 8 deletions(-) diff --git a/drivers/media/i2c/ov01a10.c b/drivers/media/i2c/ov01a10.c index 141cb6f75b55..e5df01f97978 100644 --- a/drivers/media/i2c/ov01a10.c +++ b/drivers/media/i2c/ov01a10.c @@ -75,6 +75,15 @@ #define OV01A10_REG_X_WIN 0x3811 #define OV01A10_REG_Y_WIN 0x3813 +/* + * The native ov01a10 bayer-pattern is GBRG, but there was a driver bug enabling + * hflip/mirroring by default resulting in BGGR. Because of this bug Intel's + * proprietary IPU6 userspace stack expects BGGR. So we report BGGR to not break + * userspace and fix things up by shifting the crop window-x coordinate by 1 + * when hflip is *disabled*. + */ +#define OV01A10_MEDIA_BUS_FMT MEDIA_BUS_FMT_SBGGR10_1X10 + struct ov01a10_reg { u16 address; u8 val; @@ -185,14 +194,14 @@ static const struct ov01a10_reg sensor_1280x800_setting[] = { {0x380e, 0x03}, {0x380f, 0x80}, {0x3810, 0x00}, - {0x3811, 0x08}, + {0x3811, 0x09}, {0x3812, 0x00}, {0x3813, 0x08}, {0x3814, 0x01}, {0x3815, 0x01}, {0x3816, 0x01}, {0x3817, 0x01}, - {0x3820, 0xa0}, + {0x3820, 0xa8}, {0x3822, 0x13}, {0x3832, 0x28}, {0x3833, 0x10}, @@ -411,7 +420,7 @@ static int ov01a10_set_hflip(struct ov01a10 *ov01a10, u32 hflip) int ret; u32 val, offset; - offset = hflip ? 0x9 : 0x8; + offset = hflip ? 0x8 : 0x9; ret = ov01a10_write_reg(ov01a10, OV01A10_REG_X_WIN, 1, offset); if (ret) return ret; @@ -420,8 +429,8 @@ static int ov01a10_set_hflip(struct ov01a10 *ov01a10, u32 hflip) if (ret) return ret; - val = hflip ? val | FIELD_PREP(OV01A10_HFLIP_MASK, 0x1) : - val & ~OV01A10_HFLIP_MASK; + val = hflip ? val & ~OV01A10_HFLIP_MASK : + val | FIELD_PREP(OV01A10_HFLIP_MASK, 0x1); return ov01a10_write_reg(ov01a10, OV01A10_REG_FORMAT1, 1, val); } @@ -610,7 +619,7 @@ static void ov01a10_update_pad_format(const struct ov01a10_mode *mode, { fmt->width = mode->width; fmt->height = mode->height; - fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10; + fmt->code = OV01A10_MEDIA_BUS_FMT; fmt->field = V4L2_FIELD_NONE; fmt->colorspace = V4L2_COLORSPACE_RAW; } @@ -751,7 +760,7 @@ static int ov01a10_enum_mbus_code(struct v4l2_subdev *sd, if (code->index > 0) return -EINVAL; - code->code = MEDIA_BUS_FMT_SBGGR10_1X10; + code->code = OV01A10_MEDIA_BUS_FMT; return 0; } @@ -761,7 +770,7 @@ static int ov01a10_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_frame_size_enum *fse) { if (fse->index >= ARRAY_SIZE(supported_modes) || - fse->code != MEDIA_BUS_FMT_SBGGR10_1X10) + fse->code != OV01A10_MEDIA_BUS_FMT) return -EINVAL; fse->min_width = supported_modes[fse->index].width; -- 2.51.0

1 week, 4 days

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FAILED: patch "[PATCH] serial: sc16is7xx: remove useless enable of enhanced features" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 1c05bf6c0262f946571a37678250193e46b1ff0f # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025102739-fable-reroute-e6a6@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 1c05bf6c0262f946571a37678250193e46b1ff0f Mon Sep 17 00:00:00 2001 From: Hugo Villeneuve <hvilleneuve(a)dimonoff.com> Date: Mon, 6 Oct 2025 10:20:02 -0400 Subject: [PATCH] serial: sc16is7xx: remove useless enable of enhanced features Commit 43c51bb573aa ("sc16is7xx: make sure device is in suspend once probed") permanently enabled access to the enhanced features in sc16is7xx_probe(), and it is never disabled after that. Therefore, remove re-enable of enhanced features in sc16is7xx_set_baud(). This eliminates a potential useless read + write cycle each time the baud rate is reconfigured. Fixes: 43c51bb573aa ("sc16is7xx: make sure device is in suspend once probed") Cc: stable <stable(a)kernel.org> Signed-off-by: Hugo Villeneuve <hvilleneuve(a)dimonoff.com> Link: https://patch.msgid.link/20251006142002.177475-1-hugo@hugovil.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 1a2c4c14f6aa..c7435595dce1 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -588,13 +588,6 @@ static int sc16is7xx_set_baud(struct uart_port *port, int baud) div /= prescaler; } - /* Enable enhanced features */ - sc16is7xx_efr_lock(port); - sc16is7xx_port_update(port, SC16IS7XX_EFR_REG, - SC16IS7XX_EFR_ENABLE_BIT, - SC16IS7XX_EFR_ENABLE_BIT); - sc16is7xx_efr_unlock(port); - /* If bit MCR_CLKSEL is set, the divide by 4 prescaler is activated. */ sc16is7xx_port_update(port, SC16IS7XX_MCR_REG, SC16IS7XX_MCR_CLKSEL_BIT,

1 week, 4 days

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FAILED: patch "[PATCH] xhci: dbc: fix bogus 1024 byte prefix if ttyDBC read races" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x f3d12ec847b945d5d65846c85f062d07d5e73164 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025102714-patriot-eel-32c8@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From f3d12ec847b945d5d65846c85f062d07d5e73164 Mon Sep 17 00:00:00 2001 From: Mathias Nyman <mathias.nyman(a)linux.intel.com> Date: Tue, 14 Oct 2025 01:55:41 +0300 Subject: [PATCH] xhci: dbc: fix bogus 1024 byte prefix if ttyDBC read races with stall event MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit DbC may add 1024 bogus bytes to the beginneing of the receiving endpoint if DbC hw triggers a STALL event before any Transfer Blocks (TRBs) for incoming data are queued, but driver handles the event after it queued the TRBs. This is possible as xHCI DbC hardware may trigger spurious STALL transfer events even if endpoint is empty. The STALL event contains a pointer to the stalled TRB, and "remaining" untransferred data length. As there are no TRBs queued yet the STALL event will just point to first TRB position of the empty ring, with '0' bytes remaining untransferred. DbC driver is polling for events, and may not handle the STALL event before /dev/ttyDBC0 is opened and incoming data TRBs are queued. The DbC event handler will now assume the first queued TRB (length 1024) has stalled with '0' bytes remaining untransferred, and copies the data This race situation can be practically mitigated by making sure the event handler handles all pending transfer events when DbC reaches configured state, and only then create dev/ttyDbC0, and start queueing transfers. The event handler can this way detect the STALL events on empty rings and discard them before any transfers are queued. This does in practice solve the issue, but still leaves a small possible gap for the race to trigger. We still need a way to distinguish spurious STALLs on empty rings with '0' bytes remaing, from actual STALL events with all bytes transmitted. Cc: stable <stable(a)kernel.org> Fixes: dfba2174dc42 ("usb: xhci: Add DbC support in xHCI driver") Tested-by: Łukasz Bartosik <ukaszb(a)chromium.org> Signed-off-by: Mathias Nyman <mathias.nyman(a)linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/host/xhci-dbgcap.c b/drivers/usb/host/xhci-dbgcap.c index 63edf2d8f245..023a8ec6f305 100644 --- a/drivers/usb/host/xhci-dbgcap.c +++ b/drivers/usb/host/xhci-dbgcap.c @@ -892,7 +892,8 @@ static enum evtreturn xhci_dbc_do_handle_events(struct xhci_dbc *dbc) dev_info(dbc->dev, "DbC configured\n"); portsc = readl(&dbc->regs->portsc); writel(portsc, &dbc->regs->portsc); - return EVT_GSER; + ret = EVT_GSER; + break; } return EVT_DONE; @@ -954,7 +955,8 @@ static enum evtreturn xhci_dbc_do_handle_events(struct xhci_dbc *dbc) break; case TRB_TYPE(TRB_TRANSFER): dbc_handle_xfer_event(dbc, evt); - ret = EVT_XFER_DONE; + if (ret != EVT_GSER) + ret = EVT_XFER_DONE; break; default: break;

1 week, 4 days

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FAILED: patch "[PATCH] serial: 8250_dw: handle reset control deassert error" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x daeb4037adf7d3349b4a1fb792f4bc9824686a4b # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025102700-sleep-robotics-c9e3@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From daeb4037adf7d3349b4a1fb792f4bc9824686a4b Mon Sep 17 00:00:00 2001 From: Artem Shimko <a.shimko.dev(a)gmail.com> Date: Sun, 19 Oct 2025 12:51:31 +0300 Subject: [PATCH] serial: 8250_dw: handle reset control deassert error Check the return value of reset_control_deassert() in the probe function to prevent continuing probe when reset deassertion fails. Previously, reset_control_deassert() was called without checking its return value, which could lead to probe continuing even when the device reset wasn't properly deasserted. The fix checks the return value and returns an error with dev_err_probe() if reset deassertion fails, providing better error handling and diagnostics. Fixes: acbdad8dd1ab ("serial: 8250_dw: simplify optional reset handling") Cc: stable <stable(a)kernel.org> Signed-off-by: Artem Shimko <a.shimko.dev(a)gmail.com> Link: https://patch.msgid.link/20251019095131.252848-1-a.shimko.dev@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index a53ba04d9770..710ae4d40aec 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -635,7 +635,9 @@ static int dw8250_probe(struct platform_device *pdev) if (IS_ERR(data->rst)) return PTR_ERR(data->rst); - reset_control_deassert(data->rst); + err = reset_control_deassert(data->rst); + if (err) + return dev_err_probe(dev, err, "failed to deassert resets\n"); err = devm_add_action_or_reset(dev, dw8250_reset_control_assert, data->rst); if (err)

1 week, 4 days

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FAILED: patch "[PATCH] serial: sc16is7xx: remove useless enable of enhanced features" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 1c05bf6c0262f946571a37678250193e46b1ff0f # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025102739-casualty-hankering-f9ab@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 1c05bf6c0262f946571a37678250193e46b1ff0f Mon Sep 17 00:00:00 2001 From: Hugo Villeneuve <hvilleneuve(a)dimonoff.com> Date: Mon, 6 Oct 2025 10:20:02 -0400 Subject: [PATCH] serial: sc16is7xx: remove useless enable of enhanced features Commit 43c51bb573aa ("sc16is7xx: make sure device is in suspend once probed") permanently enabled access to the enhanced features in sc16is7xx_probe(), and it is never disabled after that. Therefore, remove re-enable of enhanced features in sc16is7xx_set_baud(). This eliminates a potential useless read + write cycle each time the baud rate is reconfigured. Fixes: 43c51bb573aa ("sc16is7xx: make sure device is in suspend once probed") Cc: stable <stable(a)kernel.org> Signed-off-by: Hugo Villeneuve <hvilleneuve(a)dimonoff.com> Link: https://patch.msgid.link/20251006142002.177475-1-hugo@hugovil.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 1a2c4c14f6aa..c7435595dce1 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -588,13 +588,6 @@ static int sc16is7xx_set_baud(struct uart_port *port, int baud) div /= prescaler; } - /* Enable enhanced features */ - sc16is7xx_efr_lock(port); - sc16is7xx_port_update(port, SC16IS7XX_EFR_REG, - SC16IS7XX_EFR_ENABLE_BIT, - SC16IS7XX_EFR_ENABLE_BIT); - sc16is7xx_efr_unlock(port); - /* If bit MCR_CLKSEL is set, the divide by 4 prescaler is activated. */ sc16is7xx_port_update(port, SC16IS7XX_MCR_REG, SC16IS7XX_MCR_CLKSEL_BIT,

1 week, 4 days

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[[Name]]Alliance Ad

by Almus

1 week, 4 days

1
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[PATCH 0/4] drm/tidss: Fixes data edge sampling

by Louis Chauvet

Currently the driver only configure the data edge sampling partially. The AM62 require it to be configured in two distincts registers: one in tidss and one in the general device registers. Introduce a new dt property to link the proper syscon node from the main device registers into the tidss driver. Fixes: 32a1795f57ee ("drm/tidss: New driver for TI Keystone platform Display SubSystem") --- Cc: stable(a)vger.kernel.org Signed-off-by: Louis Chauvet <louis.chauvet(a)bootlin.com> --- Louis Chauvet (4): dt-bindings: display: ti,am65x-dss: Add clk property for data edge synchronization dt-bindings: mfd: syscon: Add ti,am625-dss-clk-ctrl arm64: dts: ti: k3-am62-main: Add tidss clk-ctrl property drm/tidss: Fix sampling edge configuration .../devicetree/bindings/display/ti/ti,am65x-dss.yaml | 6 ++++++ Documentation/devicetree/bindings/mfd/syscon.yaml | 3 ++- arch/arm64/boot/dts/ti/k3-am62-main.dtsi | 6 ++++++ drivers/gpu/drm/tidss/tidss_dispc.c | 14 ++++++++++++++ 4 files changed, 28 insertions(+), 1 deletion(-) --- base-commit: 85c23f28905cf20a86ceec3cfd7a0a5572c9eb13 change-id: 20250730-fix-edge-handling-9123f7438910 Best regards, -- Louis Chauvet <louis.chauvet(a)bootlin.com>

1 week, 4 days

6
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