kernel/drivers/gpu/ipu-v3/ipu-ic.c, branch linux-6.2.y

gpu: ipu-v3: ipu-ic: Fully describe colorspace conversions

2019-06-14T13:31:45Z

Only providing the input and output RGB/YUV space to the IC task init functions is not sufficient. To fully characterize a colorspace conversion, the Y'CbCr encoding standard, and quantization also need to be specified. Define a 'struct ipu_ic_colorspace' that includes all the above. This allows to actually enforce the fact that the IC: - can only encode to/from YUV and RGB full range. A follow-up patch will remove this restriction. - can only encode using BT.601 standard. A follow-up patch will add Rec.709 encoding support. The determination of the CSC coefficients based on the input/output 'struct ipu_ic_colorspace' are moved to a new exported function ipu_ic_calc_csc(), and 'struct ic_csc_params' is exported as 'struct ipu_ic_csc_params'. ipu_ic_calc_csc() fills a 'struct ipu_ic_csc' with the input/output 'struct ipu_ic_colorspace' and the calculated 'struct ic_csc_params' from those input/output colorspaces. The functions ipu_ic_task_init(_rsc)() now take a filled 'struct ipu_ic_csc'. The existing CSC coefficient tables and ipu_ic_calc_csc() are moved to a new module ipu-ic-csc.c. This is in preparation for adding more coefficient tables for limited range quantization and more encoding standards. The existing ycbcr2rgb and inverse rgb2ycbcr tables defined the BT.601 Y'CbCr encoding coefficients. The rgb2ycbcr table specifically described the BT.601 encoding from full range RGB to full range YUV. Table comments have been added in ipu-ic-csc.c to make this more clear. The ycbcr2rgb inverse table described encoding YUV limited range to RGB full range. To be consistent with the rgb2ycbcr table, this table is converted to YUV full range to RGB full range, and the comments are expanded in ipu-ic-csc.c. The ic_csc_rgb2rgb table was just an identity matrix, so it is renamed 'identity' in ipu-ic-csc.c. Signed-off-by: Steve Longerbeam [p.zabel@pengutronix.de: removed a superfluous blank line] Signed-off-by: Philipp Zabel

gpu: ipu-v3: ipu-ic: Fix saturation bit offset in TPMEM

2019-06-14T12:07:34Z

The saturation bit was being set at bit 9 in the second 32-bit word of the TPMEM CSC. This isn't correct, the saturation bit is bit 42, which is bit 10 of the second word. Fixes: 1aa8ea0d2bd5d ("gpu: ipu-v3: Add Image Converter unit") Signed-off-by: Steve Longerbeam Reviewed-by: Philipp Zabel Cc: stable@vger.kernel.org Signed-off-by: Philipp Zabel

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 159

2019-05-30T18:26:37Z

Based on 1 normalized pattern(s): the code contained herein is licensed under the gnu general public license you may obtain a copy of the gnu general public license version 2 or later at the following locations http www opensource org licenses gpl license html http www gnu org copyleft gpl html extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 161 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Richard Fontana Reviewed-by: Allison Randal Reviewed-by: Kate Stewart Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.383790741@linutronix.de Signed-off-by: Greg Kroah-Hartman

gpu: ipu-v3: ipu-ic: allow to manually set resize coefficients

2018-11-05T13:40:06Z

For tiled scaling, we want to compute the scaling coefficients externally in such a way that the interpolation overshoots tile boundaries and samples up to the first pixel of the next tile. Prepare to override the resizing coefficients from the image conversion code. Signed-off-by: Philipp Zabel Acked-by: Steve Longerbeam Tested-by: Steve Longerbeam

gpu: ipu-v3: allow to build with COMPILE_TEST

2017-12-19T11:49:11Z

Add missing include in ipu-cpmem and ipu-ic, select BITREVERSE for ipu-cpmem and GENERIC_ALLOCATOR for ipu-pre, and allow to build if COMPILE_TEST is enabled. Signed-off-by: Philipp Zabel

gpu: ipu-v3: Add ipu_rot_mode_is_irt()

2016-09-19T06:30:14Z

Add a macro that returns boolean true if the given ipu_rotate_mode requires the use of the Image Rotator. Signed-off-by: Steve Longerbeam Signed-off-by: Philipp Zabel

gpu: ipu-v3: Fix IRT usage

2016-08-08T09:44:20Z

There can be multiple IC tasks using the IRT, so the IRT needs a separate use counter. Create a private ipu_irt_enable() to enable the IRT module when any IC task requires rotation, and ipu_irt_disable() when a task no longer needs the IRT. Signed-off-by: Steve Longerbeam Signed-off-by: Philipp Zabel

gpu: ipu-v3: turns out the IPU can only downsize 4:1

2015-03-31T10:03:55Z

The value for downsizing 8:1 is marked as reserved in the technical reference manual and the documentation states downsizing capability up to 4:1 only. Signed-off-by: Philipp Zabel

gpu: ipu-v3: Add Image Converter unit

2014-09-02T12:55:43Z

Adds the Image Converter (IC) unit. Signed-off-by: Steve Longerbeam Condensed the three CSC setup functions into a single one that uses static tables to set up the CSC task parameters. Signed-off-by: Philipp Zabel