staging/atomisp: Add support for the Intel IPU v2

This patch adds support for the Intel IPU v2 as found on Android and IoT
Baytrail-T and Baytrail-CR platforms (those with the IPU PCI mapped). You
will also need the firmware files from your device (Android usually puts
them into /etc) - or you can find them in the downloadable restore/upgrade
kits if you blew them away for some reason.

It may be possible to extend the driver to handle the BYT/T windows
platforms such as the ASUS T100TA. These platforms don't expose the IPU via
the PCI interface but via ACPI buried in the GPU description and with the
camera information somewhere unknown so would need a platform driver
interface adding to the codebase *IFF* the firmware works on such devices.

To get good results you also need a suitable support library such as
libxcam. The camera is intended to be driven from Android so it has a lot of
features that many desktop apps don't fully spport.

In theory all the pieces are there to build it with -DISP2401 and some
differing files to get CherryTrail/T support, but unifying the drivers
properlly is a work in progress.

The IPU driver represents the work of a lot of people within Intel over many
years. It's historical goal was portability rather than Linux upstream. Any
queries about the upstream aimed driver should be sent to me not to the
original authors.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 110 insertions, 0 deletions

diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/ia_css_stream.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/ia_css_stream.h
new file mode 100644
index 0000000..453fe4d
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/ia_css_stream.h
@@ -0,0 +1,110 @@
+/*
+ * Support for Intel Camera Imaging ISP subsystem.
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef _IA_CSS_STREAM_H_
+#define _IA_CSS_STREAM_H_
+
+#include <type_support.h>
+#include <system_local.h>
+#if !defined(HAS_NO_INPUT_SYSTEM) && !defined(USE_INPUT_SYSTEM_VERSION_2401)
+#include <input_system.h>
+#endif
+#include "ia_css_types.h"
+#include "ia_css_stream_public.h"
+
+/**
+ * structure to hold all internal stream related information
+ */
+struct ia_css_stream {
+	struct ia_css_stream_config    config;
+	struct ia_css_stream_info      info;
+#if !defined(HAS_NO_INPUT_SYSTEM) && !defined(USE_INPUT_SYSTEM_VERSION_2401)
+	rx_cfg_t                       csi_rx_config;
+#endif
+	bool                           reconfigure_css_rx;
+	struct ia_css_pipe            *last_pipe;
+	int                            num_pipes;
+	struct ia_css_pipe           **pipes;
+	struct ia_css_pipe            *continuous_pipe;
+	struct ia_css_isp_parameters  *isp_params_configs;
+	struct ia_css_isp_parameters  *per_frame_isp_params_configs;
+
+	bool                           cont_capt;
+	bool                           disable_cont_vf;
+#ifndef ISP2401
+	bool                           stop_copy_preview;
+#endif
+	bool                           started;
+};
+
+/** @brief Get a binary in the stream, which binary has the shading correction.
+ *
+ * @param[in] stream: The stream.
+ * @return	The binary which has the shading correction.
+ *
+ */
+struct ia_css_binary *
+ia_css_stream_get_shading_correction_binary(const struct ia_css_stream *stream);
+
+struct ia_css_binary *
+ia_css_stream_get_dvs_binary(const struct ia_css_stream *stream);
+
+struct ia_css_binary *
+ia_css_stream_get_3a_binary(const struct ia_css_stream *stream);
+
+unsigned int
+ia_css_stream_input_format_bits_per_pixel(struct ia_css_stream *stream);
+
+bool
+sh_css_params_set_binning_factor(struct ia_css_stream *stream, unsigned int sensor_binning);
+
+void
+sh_css_invalidate_params(struct ia_css_stream *stream);
+
+/* The following functions are used for testing purposes only */
+const struct ia_css_fpn_table *
+ia_css_get_fpn_table(struct ia_css_stream *stream);
+
+/** @brief Get a pointer to the shading table.
+ *
+ * @param[in] stream: The stream.
+ * @return	The pointer to the shading table.
+ *
+ */
+struct ia_css_shading_table *
+ia_css_get_shading_table(struct ia_css_stream *stream);
+
+void
+ia_css_get_isp_dis_coefficients(struct ia_css_stream *stream,
+				short *horizontal_coefficients,
+				short *vertical_coefficients);
+
+void
+ia_css_get_isp_dvs2_coefficients(struct ia_css_stream *stream,
+	short *hor_coefs_odd_real,
+	short *hor_coefs_odd_imag,
+	short *hor_coefs_even_real,
+	short *hor_coefs_even_imag,
+	short *ver_coefs_odd_real,
+	short *ver_coefs_odd_imag,
+	short *ver_coefs_even_real,
+	short *ver_coefs_even_imag);
+
+enum ia_css_err
+ia_css_stream_isp_parameters_init(struct ia_css_stream *stream);
+
+void
+ia_css_stream_isp_parameters_uninit(struct ia_css_stream *stream);
+
+#endif /*_IA_CSS_STREAM_H_*/