// SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2018 Intel Corporation #include <linux/device.h> #include <linux/iopoll.h> #include <linux/slab.h> #include "ipu3.h" #include "ipu3-css.h" #include "ipu3-css-fw.h" #include "ipu3-css-params.h" #include "ipu3-dmamap.h" #include "ipu3-tables.h" /* IRQ configuration */ #define IMGU_IRQCTRL_IRQ_MASK … #define IPU3_CSS_FORMAT_BPP_DEN … /* Some sane limits for resolutions */ #define IPU3_CSS_MIN_RES … #define IPU3_CSS_MAX_H … #define IPU3_CSS_MAX_W … /* minimal envelope size(GDC in - out) should be 4 */ #define MIN_ENVELOPE … /* * pre-allocated buffer size for CSS ABI, auxiliary frames * after BDS and before GDC. Those values should be tuned * to big enough to avoid buffer re-allocation when * streaming to lower streaming latency. */ #define CSS_ABI_SIZE … #define CSS_BDS_SIZE … #define CSS_GDC_SIZE … #define IPU3_CSS_QUEUE_TO_FLAGS(q) … #define IPU3_CSS_FORMAT_FL_IN … #define IPU3_CSS_FORMAT_FL_OUT … #define IPU3_CSS_FORMAT_FL_VF … /* Formats supported by IPU3 Camera Sub System */ static const struct imgu_css_format imgu_css_formats[] = …; static const struct { … } imgu_css_queues[IPU3_CSS_QUEUES] = …; /* Initialize queue based on given format, adjust format as needed */ static int imgu_css_queue_init(struct imgu_css_queue *queue, struct v4l2_pix_format_mplane *fmt, u32 flags) { … } static bool imgu_css_queue_enabled(struct imgu_css_queue *q) { … } /******************* css hw *******************/ /* In the style of writesl() defined in include/asm-generic/io.h */ static inline void writes(const void *mem, ssize_t count, void __iomem *addr) { … } /* Wait until register `reg', masked with `mask', becomes `cmp' */ static int imgu_hw_wait(void __iomem *base, int reg, u32 mask, u32 cmp) { … } /* Initialize the IPU3 CSS hardware and associated h/w blocks */ int imgu_css_set_powerup(struct device *dev, void __iomem *base, unsigned int freq) { … } void imgu_css_set_powerdown(struct device *dev, void __iomem *base) { … } static void imgu_css_hw_enable_irq(struct imgu_css *css) { … } static int imgu_css_hw_init(struct imgu_css *css) { … } /* Boot the given IPU3 CSS SP */ static int imgu_css_hw_start_sp(struct imgu_css *css, int sp) { … } /* Start the IPU3 CSS ImgU (Imaging Unit) and all the SPs */ static int imgu_css_hw_start(struct imgu_css *css) { … } static void imgu_css_hw_stop(struct imgu_css *css) { … } static void imgu_css_hw_cleanup(struct imgu_css *css) { … } static void imgu_css_pipeline_cleanup(struct imgu_css *css, unsigned int pipe) { … } /* * This function initializes various stages of the * IPU3 CSS ISP pipeline */ static int imgu_css_pipeline_init(struct imgu_css *css, unsigned int pipe) { … } static u8 imgu_css_queue_pos(struct imgu_css *css, int queue, int thread) { … } /* Sent data to sp using given buffer queue, or if queue < 0, event queue. */ static int imgu_css_queue_data(struct imgu_css *css, int queue, int thread, u32 data) { … } /* Receive data using given buffer queue, or if queue < 0, event queue. */ static int imgu_css_dequeue_data(struct imgu_css *css, int queue, u32 *data) { … } /* Free binary-specific resources */ static void imgu_css_binary_cleanup(struct imgu_css *css, unsigned int pipe) { … } static int imgu_css_binary_preallocate(struct imgu_css *css, unsigned int pipe) { … } /* allocate binary-specific resources */ static int imgu_css_binary_setup(struct imgu_css *css, unsigned int pipe) { … } int imgu_css_start_streaming(struct imgu_css *css) { … } void imgu_css_stop_streaming(struct imgu_css *css) { … } bool imgu_css_pipe_queue_empty(struct imgu_css *css, unsigned int pipe) { … } bool imgu_css_queue_empty(struct imgu_css *css) { … } bool imgu_css_is_streaming(struct imgu_css *css) { … } static int imgu_css_map_init(struct imgu_css *css, unsigned int pipe) { … } static void imgu_css_pipe_cleanup(struct imgu_css *css, unsigned int pipe) { … } void imgu_css_cleanup(struct imgu_css *css) { … } int imgu_css_init(struct device *dev, struct imgu_css *css, void __iomem *base, int length) { … } static u32 imgu_css_adjust(u32 res, u32 align) { … } /* Select a binary matching the required resolutions and formats */ static int imgu_css_find_binary(struct imgu_css *css, unsigned int pipe, struct imgu_css_queue queue[IPU3_CSS_QUEUES], struct v4l2_rect rects[IPU3_CSS_RECTS]) { … } /* * Check that there is a binary matching requirements. Parameters may be * NULL indicating disabled input/output. Return negative if given * parameters can not be supported or on error, zero or positive indicating * found binary number. May modify the given parameters if not exact match * is found. */ int imgu_css_fmt_try(struct imgu_css *css, struct v4l2_pix_format_mplane *fmts[IPU3_CSS_QUEUES], struct v4l2_rect *rects[IPU3_CSS_RECTS], unsigned int pipe) { … } int imgu_css_fmt_set(struct imgu_css *css, struct v4l2_pix_format_mplane *fmts[IPU3_CSS_QUEUES], struct v4l2_rect *rects[IPU3_CSS_RECTS], unsigned int pipe) { … } int imgu_css_meta_fmt_set(struct v4l2_meta_format *fmt) { … } /* * Queue given buffer to CSS. imgu_css_buf_prepare() must have been first * called for the buffer. May be called from interrupt context. * Returns 0 on success, -EBUSY if the buffer queue is full, or some other * code on error conditions. */ int imgu_css_buf_queue(struct imgu_css *css, unsigned int pipe, struct imgu_css_buffer *b) { … } /* * Get next ready CSS buffer. Returns -EAGAIN in which case the function * should be called again, or -EBUSY which means that there are no more * buffers available. May be called from interrupt context. */ struct imgu_css_buffer *imgu_css_buf_dequeue(struct imgu_css *css) { … } /* * Get a new set of parameters from pool and initialize them based on * the parameters params, gdc, and obgrid. Any of these may be NULL, * in which case the previously set parameters are used. * If parameters haven't been set previously, initialize from scratch. * * Return index to css->parameter_set_info which has the newly created * parameters or negative value on error. */ int imgu_css_set_parameters(struct imgu_css *css, unsigned int pipe, struct ipu3_uapi_params *set_params) { … } int imgu_css_irq_ack(struct imgu_css *css) { … }
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