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, 94 insertions, 0 deletions

diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/ia_css_stream_format.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/ia_css_stream_format.h
new file mode 100644
index 0000000..ae608a9
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/ia_css_stream_format.h
@@ -0,0 +1,94 @@
+/*
+ * 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_FORMAT_H
+#define __IA_CSS_STREAM_FORMAT_H
+
+/** @file
+ * This file contains formats usable for ISP streaming input
+ */
+
+#include <type_support.h> /* bool */
+
+/** The ISP streaming input interface supports the following formats.
+ *  These match the corresponding MIPI formats.
+ */
+enum ia_css_stream_format {
+	IA_CSS_STREAM_FORMAT_YUV420_8_LEGACY,    /**< 8 bits per subpixel */
+	IA_CSS_STREAM_FORMAT_YUV420_8,  /**< 8 bits per subpixel */
+	IA_CSS_STREAM_FORMAT_YUV420_10, /**< 10 bits per subpixel */
+	IA_CSS_STREAM_FORMAT_YUV420_16, /**< 16 bits per subpixel */
+	IA_CSS_STREAM_FORMAT_YUV422_8,  /**< UYVY..UYVY, 8 bits per subpixel */
+	IA_CSS_STREAM_FORMAT_YUV422_10, /**< UYVY..UYVY, 10 bits per subpixel */
+	IA_CSS_STREAM_FORMAT_YUV422_16, /**< UYVY..UYVY, 16 bits per subpixel */
+	IA_CSS_STREAM_FORMAT_RGB_444,  /**< BGR..BGR, 4 bits per subpixel */
+	IA_CSS_STREAM_FORMAT_RGB_555,  /**< BGR..BGR, 5 bits per subpixel */
+	IA_CSS_STREAM_FORMAT_RGB_565,  /**< BGR..BGR, 5 bits B and R, 6 bits G */
+	IA_CSS_STREAM_FORMAT_RGB_666,  /**< BGR..BGR, 6 bits per subpixel */
+	IA_CSS_STREAM_FORMAT_RGB_888,  /**< BGR..BGR, 8 bits per subpixel */
+	IA_CSS_STREAM_FORMAT_RAW_6,    /**< RAW data, 6 bits per pixel */
+	IA_CSS_STREAM_FORMAT_RAW_7,    /**< RAW data, 7 bits per pixel */
+	IA_CSS_STREAM_FORMAT_RAW_8,    /**< RAW data, 8 bits per pixel */
+	IA_CSS_STREAM_FORMAT_RAW_10,   /**< RAW data, 10 bits per pixel */
+	IA_CSS_STREAM_FORMAT_RAW_12,   /**< RAW data, 12 bits per pixel */
+	IA_CSS_STREAM_FORMAT_RAW_14,   /**< RAW data, 14 bits per pixel */
+	IA_CSS_STREAM_FORMAT_RAW_16,   /**< RAW data, 16 bits per pixel, which is
+					    not specified in CSI-MIPI standard*/
+	IA_CSS_STREAM_FORMAT_BINARY_8, /**< Binary byte stream, which is target at
+					    JPEG. */
+
+	/** CSI2-MIPI specific format: Generic short packet data. It is used to
+	 *  keep the timing information for the opening/closing of shutters,
+	 *  triggering of flashes and etc.
+	 */
+	IA_CSS_STREAM_FORMAT_GENERIC_SHORT1,  /**< Generic Short Packet Code 1 */
+	IA_CSS_STREAM_FORMAT_GENERIC_SHORT2,  /**< Generic Short Packet Code 2 */
+	IA_CSS_STREAM_FORMAT_GENERIC_SHORT3,  /**< Generic Short Packet Code 3 */
+	IA_CSS_STREAM_FORMAT_GENERIC_SHORT4,  /**< Generic Short Packet Code 4 */
+	IA_CSS_STREAM_FORMAT_GENERIC_SHORT5,  /**< Generic Short Packet Code 5 */
+	IA_CSS_STREAM_FORMAT_GENERIC_SHORT6,  /**< Generic Short Packet Code 6 */
+	IA_CSS_STREAM_FORMAT_GENERIC_SHORT7,  /**< Generic Short Packet Code 7 */
+	IA_CSS_STREAM_FORMAT_GENERIC_SHORT8,  /**< Generic Short Packet Code 8 */
+
+	/** CSI2-MIPI specific format: YUV data.
+	 */
+	IA_CSS_STREAM_FORMAT_YUV420_8_SHIFT,  /**< YUV420 8-bit (Chroma Shifted Pixel Sampling) */
+	IA_CSS_STREAM_FORMAT_YUV420_10_SHIFT, /**< YUV420 8-bit (Chroma Shifted Pixel Sampling) */
+
+	/** CSI2-MIPI specific format: Generic long packet data
+	 */
+	IA_CSS_STREAM_FORMAT_EMBEDDED, /**< Embedded 8-bit non Image Data */
+
+	/** CSI2-MIPI specific format: User defined byte-based data. For example,
+	 *  the data transmitter (e.g. the SoC sensor) can keep the JPEG data as
+	 *  the User Defined Data Type 4 and the MPEG data as the
+	 *  User Defined Data Type 7.
+	 */
+	IA_CSS_STREAM_FORMAT_USER_DEF1,  /**< User defined 8-bit data type 1 */
+	IA_CSS_STREAM_FORMAT_USER_DEF2,  /**< User defined 8-bit data type 2 */
+	IA_CSS_STREAM_FORMAT_USER_DEF3,  /**< User defined 8-bit data type 3 */
+	IA_CSS_STREAM_FORMAT_USER_DEF4,  /**< User defined 8-bit data type 4 */
+	IA_CSS_STREAM_FORMAT_USER_DEF5,  /**< User defined 8-bit data type 5 */
+	IA_CSS_STREAM_FORMAT_USER_DEF6,  /**< User defined 8-bit data type 6 */
+	IA_CSS_STREAM_FORMAT_USER_DEF7,  /**< User defined 8-bit data type 7 */
+	IA_CSS_STREAM_FORMAT_USER_DEF8,  /**< User defined 8-bit data type 8 */
+};
+
+#define	IA_CSS_STREAM_FORMAT_NUM	IA_CSS_STREAM_FORMAT_USER_DEF8
+
+unsigned int ia_css_util_input_format_bpp(
+	enum ia_css_stream_format format,
+	bool two_ppc);
+
+#endif /* __IA_CSS_STREAM_FORMAT_H */