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>

4 files changed, 189 insertions, 0 deletions

diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/hdr/ia_css_hdr.host.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/hdr/ia_css_hdr.host.c
new file mode 100644
index 0000000..8215ae4
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/hdr/ia_css_hdr.host.c
@@ -0,0 +1,41 @@
+/* Release Version: irci_stable_candrpv_0415_20150521_0458 */
+/* Release Version: irci_ecr-master_20150911_0724 */
+/*
+ * 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.
+ */
+
+#include "ia_css_hdr.host.h"
+
+void
+ia_css_hdr_init_config(
+	struct sh_css_isp_hdr_params *to,
+	const struct ia_css_hdr_config *from,
+	unsigned size)
+{
+	int i;
+	(void)size;
+
+	for (i = 0; i < HDR_NUM_INPUT_FRAMES - 1; i++) {
+		to->irradiance.match_shift[i] = from->irradiance.match_shift[i];
+		to->irradiance.match_mul[i]   = from->irradiance.match_mul[i];
+		to->irradiance.thr_low[i]     = from->irradiance.thr_low[i];
+		to->irradiance.thr_high[i]    = from->irradiance.thr_high[i];
+		to->irradiance.thr_coeff[i]   = from->irradiance.thr_coeff[i];
+		to->irradiance.thr_shift[i]   = from->irradiance.thr_shift[i];
+	}
+	to->irradiance.test_irr    = from->irradiance.test_irr;
+	to->irradiance.weight_bpp  = from->irradiance.weight_bpp;
+
+	to->deghost.test_deg    = from->deghost.test_deg;
+	to->exclusion.test_excl = from->exclusion.test_excl;
+}
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/hdr/ia_css_hdr.host.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/hdr/ia_css_hdr.host.h
new file mode 100644
index 0000000..8f89bc8
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/hdr/ia_css_hdr.host.h
@@ -0,0 +1,31 @@
+/* Release Version: irci_stable_candrpv_0415_20150521_0458 */
+/* Release Version: irci_ecr-master_20150911_0724 */
+/*
+ * 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_HDR_HOST_H
+#define __IA_CSS_HDR_HOST_H
+
+#include "ia_css_hdr_param.h"
+#include "ia_css_hdr_types.h"
+
+extern const struct ia_css_hdr_config default_hdr_config;
+
+void
+ia_css_hdr_init_config(
+	struct sh_css_isp_hdr_params *to,
+	const struct ia_css_hdr_config *from,
+	unsigned size);
+
+#endif /* __IA_CSS_HDR_HOST_H */
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/hdr/ia_css_hdr_param.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/hdr/ia_css_hdr_param.h
new file mode 100644
index 0000000..1c053af
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/hdr/ia_css_hdr_param.h
@@ -0,0 +1,53 @@
+/* Release Version: irci_stable_candrpv_0415_20150521_0458 */
+/* Release Version: irci_ecr-master_20150911_0724 */
+/*
+ * 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_HDR_PARAMS_H
+#define __IA_CSS_HDR_PARAMS_H
+
+#include "type_support.h"
+
+#define HDR_NUM_INPUT_FRAMES         (3)
+
+/* HDR irradiance map parameters on ISP. */
+struct sh_css_hdr_irradiance_params {
+	int32_t test_irr;
+	int32_t match_shift[HDR_NUM_INPUT_FRAMES - 1];  /* Histogram matching shift parameter */
+	int32_t match_mul[HDR_NUM_INPUT_FRAMES - 1];    /* Histogram matching multiplication parameter */
+	int32_t thr_low[HDR_NUM_INPUT_FRAMES - 1];      /* Weight map soft threshold low bound parameter */
+	int32_t thr_high[HDR_NUM_INPUT_FRAMES - 1];     /* Weight map soft threshold high bound parameter */
+	int32_t thr_coeff[HDR_NUM_INPUT_FRAMES - 1];    /* Soft threshold linear function coefficient */
+	int32_t thr_shift[HDR_NUM_INPUT_FRAMES - 1];    /* Soft threshold precision shift parameter */
+	int32_t weight_bpp;                             /* Weight map bits per pixel */
+};
+
+/* HDR deghosting parameters on ISP */
+struct sh_css_hdr_deghost_params {
+	int32_t test_deg;
+};
+
+/* HDR exclusion parameters on ISP */
+struct sh_css_hdr_exclusion_params {
+	int32_t test_excl;
+};
+
+/* HDR ISP parameters */
+struct sh_css_isp_hdr_params {
+	struct sh_css_hdr_irradiance_params irradiance;
+	struct sh_css_hdr_deghost_params    deghost;
+	struct sh_css_hdr_exclusion_params  exclusion;
+};
+
+#endif /* __IA_CSS_HDR_PARAMS_H */
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/hdr/ia_css_hdr_types.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/hdr/ia_css_hdr_types.h
new file mode 100644
index 0000000..c3345b3
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/hdr/ia_css_hdr_types.h
@@ -0,0 +1,64 @@
+/* Release Version: irci_stable_candrpv_0415_20150521_0458 */
+/* Release Version: irci_ecr-master_20150911_0724 */
+/*
+ * 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_HDR_TYPES_H
+#define __IA_CSS_HDR_TYPES_H
+
+#define IA_CSS_HDR_MAX_NUM_INPUT_FRAMES         (3)
+
+/**
+ * \brief HDR Irradiance Parameters
+ * \detail Currently HDR paramters are used only for testing purposes
+ */
+struct ia_css_hdr_irradiance_params {
+	int test_irr;                                          /**< Test parameter */
+	int match_shift[IA_CSS_HDR_MAX_NUM_INPUT_FRAMES - 1];  /**< Histogram matching shift parameter */
+	int match_mul[IA_CSS_HDR_MAX_NUM_INPUT_FRAMES - 1];    /**< Histogram matching multiplication parameter */
+	int thr_low[IA_CSS_HDR_MAX_NUM_INPUT_FRAMES - 1];      /**< Weight map soft threshold low bound parameter */
+	int thr_high[IA_CSS_HDR_MAX_NUM_INPUT_FRAMES - 1];     /**< Weight map soft threshold high bound parameter */
+	int thr_coeff[IA_CSS_HDR_MAX_NUM_INPUT_FRAMES - 1];    /**< Soft threshold linear function coefficien */
+	int thr_shift[IA_CSS_HDR_MAX_NUM_INPUT_FRAMES - 1];    /**< Soft threshold precision shift parameter */
+	int weight_bpp;                                        /**< Weight map bits per pixel */
+};
+
+/**
+ * \brief HDR Deghosting Parameters
+ * \detail Currently HDR paramters are used only for testing purposes
+ */
+struct ia_css_hdr_deghost_params {
+	int test_deg; /**< Test parameter */
+};
+
+/**
+ * \brief HDR Exclusion Parameters
+ * \detail Currently HDR paramters are used only for testing purposes
+ */
+struct ia_css_hdr_exclusion_params {
+	int test_excl; /**< Test parameter */
+};
+
+/**
+ * \brief HDR public paramterers.
+ * \details Struct with all paramters for HDR that can be seet from
+ * the CSS API. Currenly, only test paramters are defined.
+ */
+struct ia_css_hdr_config {
+	struct ia_css_hdr_irradiance_params irradiance; /**< HDR irradiance paramaters */
+	struct ia_css_hdr_deghost_params    deghost;    /**< HDR deghosting parameters */
+	struct ia_css_hdr_exclusion_params  exclusion; /**< HDR exclusion parameters */
+};
+
+#endif /* __IA_CSS_HDR_TYPES_H */