linux/drivers/media/platform/arm, branch master

media: mali-c55: Bypass Purple Fringe Correction

2026-03-24T15:13:09Z

The Purple Fringe Correction module is enabled by default with a POR configuration which might not be correct for the lens/sensor combination in use. If the Purple Fringe Correction module has to be used, it needs to be supported in the driver's uAPI and properly configured by userspace. As the driver doesn't support it at the moment, bypass it by default. Reviewed-by: Barnabás Pőcze Reviewed-by: Daniel Scally Signed-off-by: Jacopo Mondi Signed-off-by: Hans Verkuil

media: mali-c55: Bypass the Iridix Tonemap engine

2026-03-24T15:13:09Z

The Iridix Tonemap engine, if not bypassed, applies a digital gain in order to compensate under-exposed images. This however breaks the exposure and gain regulation performed on the sensor. If the Iridix Tonemap has to be used, it need to be supported in the ISP uAPI and properly configured by userspace. As the driver doesn't support it at the moment, bypass it by default. Reviewed-by: Barnabás Pőcze Reviewed-by: Daniel Scally Signed-off-by: Jacopo Mondi Signed-off-by: Hans Verkuil

media: mali-c55: Fix Iridix bypass macros

2026-03-24T15:13:09Z

The Mali C55 Iridix block has a digital gain function and tone mapping function, whose enablement is controlled by two different bits in the BYPASS_3 register. Unfortunately, the "Gain" and "Tonemap" bypass bit definitions are the wrong way around. Swap them. Cc: stable@vger.kernel.org Fixes: d5f281f3dd29 ("media: mali-c55: Add Mali-C55 ISP driver") Signed-off-by: Daniel Scally Reviewed-by: Barnabás Pőcze Signed-off-by: Jacopo Mondi Signed-off-by: Hans Verkuil

media: mali-c55: Fully reset the ISP configuration

2026-03-24T15:13:09Z

The Mali C55 driver uses an auto-suspend delay of 2000 milli-seconds. As the delay is quite large, it is certainly possible that two consecutive calls to enable_streams() do not go through a suspend of the peripheral, meaning we cannot rely on POW register values for the ISP configuration. To prevent a streaming session to be initialized with settings from the previous one, reset the full ISP configuration to know state disabling or bypassing all the ISP blocks the driver supports. Cc: stable@vger.kernel.org Fixes: d5f281f3dd29 ("media: mali-c55: Add Mali-C55 ISP driver") Reviewed-by: Daniel Scally Signed-off-by: Jacopo Mondi Signed-off-by: Hans Verkuil

media: mali-c55: Initialize the ISP in enable_streams()

2026-03-24T15:13:09Z

The Mali C55 driver initializes the ISP in two points: 1) At probe time it disables ISP blocks by configuring them in bypass mode 2) At enable_streams() it initializes the crop rectangles and the image processing pipeline using the current image format However, as ISP blocks are configured by userspace, if their configuration is not reset, from the second enable_streams() call onwards the ISP configuration will depend on the previous streaming session configuration. To re-initialize the ISP completely at enable_streams() time consolidate the ISP block bypass configuration and the image processing path configuration in a single function to be called at enabled_streams() time. Cc: stable@vger.kernel.org Fixes: d5f281f3dd29 ("media: mali-c55: Add Mali-C55 ISP driver") Reviewed-by: Daniel Scally Signed-off-by: Jacopo Mondi Signed-off-by: Hans Verkuil

media: mali-c55: Fix wrong comment of ISP block types

2026-03-24T15:13:09Z

Some bad copy&paste happened in the description of the ISP block types and AWB_CONFIG got mixed up with SHADING_CONFIG. Fix it by assigning to each block the correct type. As only the comment is changed, there is no uABI breakage or regression. Cc: stable@vger.kernel.org Fixes: d5f281f3dd29 ("media: mali-c55: Add Mali-C55 ISP driver") Reviewed-by: Daniel Scally Reviewed-by: Barnabás Pőcze Signed-off-by: Jacopo Mondi Signed-off-by: Hans Verkuil

media: mali-c55: Remove duplicated version check

2026-01-06T09:14:13Z

The Mali C55 driver uses the v4l2-isp framework, which performs validation of the parameters buffer versioning in the v4l2_isp_params_validate_buffer() function. It is not necessary to replicate the validation of the parameters buffer versioning in the platform-specific implementation. Remove it. Signed-off-by: Jacopo Mondi Reviewed-by: Daniel Scally Signed-off-by: Hans Verkuil

media: mali-c55: Mark pm handlers as __maybe_unused

2025-11-15T09:24:14Z

As the Mali-C55 driver is instrumented to work without depending on CONFIG_PM, mark the two pm_runtime handlers as __maybe_unused to suppress the compiler warning when compiling without CONFIG_PM. Signed-off-by: Jacopo Mondi Reviewed-by: Daniel Scally Signed-off-by: Hans Verkuil

media: mali-c55: Assert ISP blocks size correctness

2025-11-14T14:48:49Z

For each supported ISP block type the v4l2-isp framework expects one handler and one block type info. Static assert that the array of handlers is of the same size of the array of block types info. Signed-off-by: Jacopo Mondi Reviewed-by: Laurent Pinchart Reviewed-by: Sakari Ailus Signed-off-by: Hans Verkuil

media: v4l2-isp: Rename block_info to block_type_info

2025-11-14T14:48:49Z

The v4l2_isp_params_block_info structure contains validation information that apply to a block -type- and not only to a specific ISP block implementation. Clarify this by renaming v4l2_isp_params_block_info in v4l2_isp_params_block_type_info and update the documentation and the users of v4l2-isp accordingly. Signed-off-by: Jacopo Mondi Reviewed-by: Laurent Pinchart Reviewed-by: Sakari Ailus Signed-off-by: Hans Verkuil