starfive-tech/linux.git/drivers/media/cec, branch visionfive

media: cec: cec-gpio: reading hpd/5v is allowed to sleep

2025-07-08T06:35:27+00:00

Reading the hpd or 5v gpios is something that can sleep, so rework the code to allow this. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: cec: cec-gpio: rename functions

2025-07-08T06:35:26+00:00

Ensure that the interrupt function names clearly state for which gpio they are (cec/hpd/5v). No functional changes. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: cec: core: add rx-no-low-drive setting

2025-07-08T06:35:26+00:00

If rx-no-low-drive is set, then the CEC pin framework will disable the detection of situations where a Low Drive has to be generated. So if this is set, then we will never generate Low Drives. This helps testing whether other CEC devices generate Low Drive pulses by ensuring it is not us that is generating them. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: cec: core: add glitch error injection

2025-07-08T06:35:26+00:00

This adds support for inserting 'glitches' after a falling and/or rising edge. This tests what happens when there are little voltage spikes after falling or rising edges, which can be caused due to noise or reflections on the CEC line. A proper CEC implementation will deglitch this, but a poor implementation can create a Low Drive pulse in response, effectively making CEC unusable. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: rainshadow-cec: fix TOCTOU race condition in rain_interrupt()

2025-06-17T08:35:16+00:00

In the interrupt handler rain_interrupt(), the buffer full check on rain->buf_len is performed before acquiring rain->buf_lock. This creates a Time-of-Check to Time-of-Use (TOCTOU) race condition, as rain->buf_len is concurrently accessed and modified in the work handler rain_irq_work_handler() under the same lock. Multiple interrupt invocations can race, with each reading buf_len before it becomes full and then proceeding. This can lead to both interrupts attempting to write to the buffer, incrementing buf_len beyond its capacity (DATA_SIZE) and causing a buffer overflow. Fix this bug by moving the spin_lock() to before the buffer full check. This ensures that the check and the subsequent buffer modification are performed atomically, preventing the race condition. An corresponding spin_unlock() is added to the overflow path to correctly release the lock. This possible bug was found by an experimental static analysis tool developed by our team. Fixes: 0f314f6c2e77 ("[media] rainshadow-cec: new RainShadow Tech HDMI CEC driver") Cc: stable@vger.kernel.org Signed-off-by: Gui-Dong Han Signed-off-by: Hans Verkuil

Merge tag 'media/v6.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

2025-05-28T16:17:20+00:00

Pull media updates from Mauro Carvalho Chehab: - v4l2-core fix: V4L2_BUF_TYPE_VIDEO_OVERLAY is capture, not output - New driver: Amlogic C3 ISP - New sensor drivers: ST VD55G1 and VD56G3, OmniVision OV02C10 - amlogic: c3-mipi-csi2: Handle 64-bits division - a fix for 64-bits division at the amlogic c3-mipi-csi2 driver - Changes at atomisp to support mainline mt9m114 driver and remove deprecated GPIO APIs - various cleanups, fixes and enhancements * tag 'media/v6.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (314 commits) media: rkvdec: h264: Support High 10 and 4:2:2 profiles media: rkvdec: Add get_image_fmt ops media: rkvdec: Initialize the m2m context before the controls media: rkvdec: h264: Limit minimum profile to constrained baseline media: mediatek: jpeg: support 34bits media: verisilicon: Free post processor buffers on error media: platform: mtk-mdp3: Remove unused mdp_get_plat_device media: amlogic: c3-mipi-csi2: Handle 64-bits division media: uvcvideo: Use dev_err_probe for devm_gpiod_get_optional media: uvcvideo: Fix deferred probing error media: uvcvideo: Rollback non processed entities on error media: uvcvideo: Send control events for partial succeeds media: uvcvideo: Return the number of processed controls media: uvcvideo: Do not turn on the camera for some ioctls media: uvcvideo: Make power management granular media: uvcvideo: Increase/decrease the PM counter per IOCTL media: uvcvideo: Create uvc_pm_(get|put) functions media: uvcvideo: Keep streaming state in the file handle Documentation: media: Add documentation file c3-isp.rst Documentation: media: Add documentation file metafmt-c3-isp.rst ...

media: platform: cros-ec: select ports ab for Dirks

2025-05-09T09:55:08+00:00

The Google Dirks device used the wrong ports, fix this. Signed-off-by: Kells Ping Signed-off-by: Hans Verkuil [hverkuil: fixed outdated subject and commit log]

media: platform: cros-ec: Add Moxie to the match table

2025-04-25T13:14:34+00:00

The Google Moxie device uses the same approach as the Google Brask which enables the HDMI CEC via the cros-ec-cec driver. Signed-off-by: Ken Lin Signed-off-by: Hans Verkuil

media: platform: cros-ec: Add Dirks to the match table

2025-04-25T13:14:32+00:00

The Google Dirks device uses the same approach as the Google Brask which enables the HDMI CEC via the cros-ec-cec driver. Signed-off-by: Kells Ping Signed-off-by: Hans Verkuil

media: cec: extron-da-hd-4k-plus: Fix Wformat-truncation

2025-04-25T13:14:30+00:00

Fix gcc8 warning: drivers/media/cec/usb/extron-da-hd-4k-plus/extron-da-hd-4k-plus.c:1014:44: warning: 'DCEC' directive output may be truncated writing 4 bytes into a region of size between 0 and 53 [-Wformat-truncation=] Resizing the 'buf' and 'cmd' arrays fixed the warning. Signed-off-by: Ricardo Ribalda Signed-off-by: Hans Verkuil