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>

6 files changed, 270 insertions, 0 deletions

diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf.host.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf.host.c
new file mode 100644
index 0000000..e775af5
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf.host.c
@@ -0,0 +1,76 @@
+/*
+ * 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_debug.h"
+#include "ia_css_tdf.host.h"
+
+const int16_t g_pyramid[8][8] = {
+{128, 384, 640, 896, 896, 640, 384, 128},
+{384, 1152, 1920, 2688, 2688, 1920, 1152, 384},
+{640, 1920, 3200, 4480, 4480, 3200, 1920, 640},
+{896, 2688, 4480, 6272, 6272, 4480, 2688, 896},
+{896, 2688, 4480, 6272, 6272, 4480, 2688, 896},
+{640, 1920, 3200, 4480, 4480, 3200, 1920, 640},
+{384, 1152, 1920, 2688, 2688, 1920, 1152, 384},
+{128, 384, 640, 896, 896, 640, 384, 128}
+};
+
+void
+ia_css_tdf_vmem_encode(
+	struct ia_css_isp_tdf_vmem_params *to,
+	const struct ia_css_tdf_config *from,
+	size_t size)
+{
+	unsigned i;
+	(void)size;
+
+	for (i = 0; i < ISP_VEC_NELEMS; i++) {
+		to->pyramid[0][i]          = g_pyramid[i/8][i%8];
+		to->threshold_flat[0][i]   = from->thres_flat_table[i];
+		to->threshold_detail[0][i] = from->thres_detail_table[i];
+	}
+
+}
+
+void
+ia_css_tdf_encode(
+	struct ia_css_isp_tdf_dmem_params *to,
+	const struct ia_css_tdf_config *from,
+	size_t size)
+{
+	(void)size;
+	to->Epsilon_0        = from->epsilon_0;
+	to->Epsilon_1        = from->epsilon_1;
+	to->EpsScaleText     = from->eps_scale_text;
+	to->EpsScaleEdge     = from->eps_scale_edge;
+	to->Sepa_flat	     = from->sepa_flat;
+	to->Sepa_Edge	     = from->sepa_edge;
+	to->Blend_Flat	     = from->blend_flat;
+	to->Blend_Text	     = from->blend_text;
+	to->Blend_Edge	     = from->blend_edge;
+	to->Shading_Gain     = from->shading_gain;
+	to->Shading_baseGain = from->shading_base_gain;
+	to->LocalY_Gain      = from->local_y_gain;
+	to->LocalY_baseGain  = from->local_y_base_gain;
+}
+
+void
+ia_css_tdf_debug_dtrace(
+	const struct ia_css_tdf_config *config,
+	unsigned level)
+{
+	(void)config;
+	(void)level;
+}
+
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf.host.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf.host.h
new file mode 100644
index 0000000..1b3e759
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf.host.h
@@ -0,0 +1,39 @@
+/*
+ * 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_TDF_HOST_H
+#define __IA_CSS_TDF_HOST_H
+
+#include "ia_css_tdf_types.h"
+#include "ia_css_tdf_param.h"
+#include "ia_css_tdf_default.host.h"
+
+void
+ia_css_tdf_vmem_encode(
+	struct ia_css_isp_tdf_vmem_params *to,
+	const struct ia_css_tdf_config *from,
+	size_t size);
+
+void
+ia_css_tdf_encode(
+	struct ia_css_isp_tdf_dmem_params *to,
+	const struct ia_css_tdf_config *from,
+	size_t size);
+
+void
+ia_css_tdf_debug_dtrace(
+	const struct ia_css_tdf_config *config, unsigned level)
+;
+
+#endif /* __IA_CSS_TDF_HOST_H */
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf_default.host.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf_default.host.c
new file mode 100644
index 0000000..9bb42da
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf_default.host.c
@@ -0,0 +1,36 @@
+/*
+ * 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_tdf_types.h"
+
+const struct ia_css_tdf_config default_tdf_config = {
+	.thres_flat_table = {0},
+	.thres_detail_table = {0},
+	.epsilon_0 = 4095,
+	.epsilon_1 = 5733,
+	.eps_scale_text = 409,
+	.eps_scale_edge = 3686,
+	.sepa_flat = 1294,
+	.sepa_edge = 4095,
+	.blend_flat = 819,
+	.blend_text = 819,
+	.blend_edge = 8191,
+	.shading_gain = 1024,
+	.shading_base_gain = 8191,
+	.local_y_gain = 0,
+	.local_y_base_gain = 2047,
+	.rad_x_origin = 0,
+	.rad_y_origin = 0
+};
+
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf_default.host.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf_default.host.h
new file mode 100644
index 0000000..cd8fb70
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf_default.host.h
@@ -0,0 +1,23 @@
+/*
+ * 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_TDF_DEFAULT_HOST_H
+#define __IA_CSS_TDF_DEFAULT_HOST_H
+
+#include "ia_css_tdf_types.h"
+
+extern const struct ia_css_tdf_config default_tdf_config;
+
+#endif /* __IA_CSS_TDF_DEFAULT_HOST_H */
+
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf_param.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf_param.h
new file mode 100644
index 0000000..9334f2e
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf_param.h
@@ -0,0 +1,43 @@
+/*
+ * 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_TDF_PARAM_H
+#define __IA_CSS_TDF_PARAM_H
+
+#include "type_support.h"
+#include "vmem.h" /* needed for VMEM_ARRAY */
+
+struct ia_css_isp_tdf_vmem_params {
+	VMEM_ARRAY(pyramid, ISP_VEC_NELEMS);
+	VMEM_ARRAY(threshold_flat, ISP_VEC_NELEMS);
+	VMEM_ARRAY(threshold_detail, ISP_VEC_NELEMS);
+};
+
+struct ia_css_isp_tdf_dmem_params {
+	int32_t Epsilon_0;
+	int32_t Epsilon_1;
+	int32_t EpsScaleText;
+	int32_t EpsScaleEdge;
+	int32_t Sepa_flat;
+	int32_t Sepa_Edge;
+	int32_t Blend_Flat;
+	int32_t Blend_Text;
+	int32_t Blend_Edge;
+	int32_t Shading_Gain;
+	int32_t Shading_baseGain;
+	int32_t LocalY_Gain;
+	int32_t LocalY_baseGain;
+};
+
+#endif /* __IA_CSS_TDF_PARAM_H */
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf_types.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf_types.h
new file mode 100644
index 0000000..cc47a50
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/isp/kernels/tdf/tdf_1.0/ia_css_tdf_types.h
@@ -0,0 +1,53 @@
+/*
+ * 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_TDF_TYPES_H
+#define __IA_CSS_TDF_TYPES_H
+
+/** @file
+* CSS-API header file for Transform Domain Filter parameters.
+*/
+
+#include "type_support.h"
+
+/** Transform Domain Filter configuration
+ *
+ * \brief TDF public parameters.
+ * \details Struct with all parameters for the TDF kernel that can be set
+ * from the CSS API.
+ *
+ * ISP2.6.1: TDF is used.
+ */
+struct ia_css_tdf_config {
+	int32_t thres_flat_table[64];	/**< Final optimized strength table of NR for flat region. */
+	int32_t thres_detail_table[64];	/**< Final optimized strength table of NR for detail region. */
+	int32_t epsilon_0;		/**< Coefficient to control variance for dark area (for flat region). */
+	int32_t epsilon_1;		/**< Coefficient to control variance for bright area (for flat region). */
+	int32_t eps_scale_text;		/**< Epsilon scaling coefficient for texture region. */
+	int32_t eps_scale_edge;		/**< Epsilon scaling coefficient for edge region. */
+	int32_t sepa_flat;		/**< Threshold to judge flat (edge < m_Flat_thre). */
+	int32_t sepa_edge;		/**< Threshold to judge edge (edge > m_Edge_thre). */
+	int32_t blend_flat;		/**< Blending ratio at flat region. */
+	int32_t blend_text;		/**< Blending ratio at texture region. */
+	int32_t blend_edge;		/**< Blending ratio at edge region. */
+	int32_t shading_gain;		/**< Gain of Shading control. */
+	int32_t shading_base_gain;	/**< Base Gain of Shading control. */
+	int32_t local_y_gain;		/**< Gain of local luminance control. */
+	int32_t local_y_base_gain;	/**< Base gain of local luminance control. */
+	int32_t rad_x_origin;		/**< Initial x coord. for radius computation. */
+	int32_t rad_y_origin;		/**< Initial y coord. for radius computation. */
+};
+
+#endif /* __IA_CSS_TDF_TYPES_H */
+