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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <media/v4l2-mem2mem.h>
#include "iris_buffer.h"
#include "iris_instance.h"
#define PIXELS_4K 4096
#define MAX_WIDTH 4096
#define MAX_HEIGHT 2304
#define Y_STRIDE_ALIGN 128
#define UV_STRIDE_ALIGN 128
#define Y_SCANLINE_ALIGN 32
#define UV_SCANLINE_ALIGN 16
#define UV_SCANLINE_ALIGN_QC08C 32
#define META_STRIDE_ALIGNED 64
#define META_SCANLINE_ALIGNED 16
#define NUM_MBS_4K (DIV_ROUND_UP(MAX_WIDTH, 16) * DIV_ROUND_UP(MAX_HEIGHT, 16))
/*
* NV12:
* YUV 4:2:0 image with a plane of 8 bit Y samples followed
* by an interleaved U/V plane containing 8 bit 2x2 subsampled
* colour difference samples.
*
* <-Y/UV_Stride (aligned to 128)->
* <------- Width ------->
* Y Y Y Y Y Y Y Y Y Y Y Y . . . . ^ ^
* Y Y Y Y Y Y Y Y Y Y Y Y . . . . | |
* Y Y Y Y Y Y Y Y Y Y Y Y . . . . Height |
* Y Y Y Y Y Y Y Y Y Y Y Y . . . . | y_scanlines (aligned to 32)
* Y Y Y Y Y Y Y Y Y Y Y Y . . . . | |
* Y Y Y Y Y Y Y Y Y Y Y Y . . . . | |
* Y Y Y Y Y Y Y Y Y Y Y Y . . . . | |
* Y Y Y Y Y Y Y Y Y Y Y Y . . . . V |
* . . . . . . . . . . . . . . . . |
* . . . . . . . . . . . . . . . . |
* . . . . . . . . . . . . . . . . |
* . . . . . . . . . . . . . . . . V
* U V U V U V U V U V U V . . . . ^
* U V U V U V U V U V U V . . . . |
* U V U V U V U V U V U V . . . . |
* U V U V U V U V U V U V . . . . uv_scanlines (aligned to 16)
* . . . . . . . . . . . . . . . . |
* . . . . . . . . . . . . . . . . V
* . . . . . . . . . . . . . . . . --> Buffer size aligned to 4K
*
* y_stride : Width aligned to 128
* uv_stride : Width aligned to 128
* y_scanlines: Height aligned to 32
* uv_scanlines: Height/2 aligned to 16
* Total size = align((y_stride * y_scanlines
* + uv_stride * uv_scanlines , 4096)
*
* Note: All the alignments are hardware requirements.
*/
static u32 iris_yuv_buffer_size_nv12(struct iris_inst *inst)
{
u32 y_plane, uv_plane, y_stride, uv_stride, y_scanlines, uv_scanlines;
struct v4l2_format *f = inst->fmt_dst;
y_stride = ALIGN(f->fmt.pix_mp.width, Y_STRIDE_ALIGN);
uv_stride = ALIGN(f->fmt.pix_mp.width, UV_STRIDE_ALIGN);
y_scanlines = ALIGN(f->fmt.pix_mp.height, Y_SCANLINE_ALIGN);
uv_scanlines = ALIGN((f->fmt.pix_mp.height + 1) >> 1, UV_SCANLINE_ALIGN);
y_plane = y_stride * y_scanlines;
uv_plane = uv_stride * uv_scanlines;
return ALIGN(y_plane + uv_plane, PIXELS_4K);
}
static u32 iris_bitstream_buffer_size(struct iris_inst *inst)
{
struct platform_inst_caps *caps = inst->core->iris_platform_data->inst_caps;
u32 base_res_mbs = NUM_MBS_4K;
u32 frame_size, num_mbs;
u32 div_factor = 2;
num_mbs = iris_get_mbpf(inst);
if (num_mbs > NUM_MBS_4K) {
div_factor = 4;
base_res_mbs = caps->max_mbpf;
}
/*
* frame_size = YUVsize / div_factor
* where YUVsize = resolution_in_MBs * MBs_in_pixel * 3 / 2
*/
frame_size = base_res_mbs * (16 * 16) * 3 / 2 / div_factor;
return ALIGN(frame_size, PIXELS_4K);
}
int iris_get_buffer_size(struct iris_inst *inst,
enum iris_buffer_type buffer_type)
{
switch (buffer_type) {
case BUF_INPUT:
return iris_bitstream_buffer_size(inst);
case BUF_OUTPUT:
return iris_yuv_buffer_size_nv12(inst);
default:
return 0;
}
}
void iris_vb2_queue_error(struct iris_inst *inst)
{
struct v4l2_m2m_ctx *m2m_ctx = inst->m2m_ctx;
struct vb2_queue *q;
q = v4l2_m2m_get_src_vq(m2m_ctx);
vb2_queue_error(q);
q = v4l2_m2m_get_dst_vq(m2m_ctx);
vb2_queue_error(q);
}
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