/*
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* Copyright 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include <assert.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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#include "drv_priv.h"
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#include "helpers.h"
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#include "util.h"
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struct planar_layout {
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size_t num_planes;
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int horizontal_subsampling[DRV_MAX_PLANES];
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int vertical_subsampling[DRV_MAX_PLANES];
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int bytes_per_pixel[DRV_MAX_PLANES];
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};
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// clang-format off
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static const struct planar_layout packed_1bpp_layout = {
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.num_planes = 1,
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.horizontal_subsampling = { 1 },
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.vertical_subsampling = { 1 },
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.bytes_per_pixel = { 1 }
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};
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static const struct planar_layout packed_2bpp_layout = {
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.num_planes = 1,
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.horizontal_subsampling = { 1 },
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.vertical_subsampling = { 1 },
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.bytes_per_pixel = { 2 }
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};
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static const struct planar_layout packed_3bpp_layout = {
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.num_planes = 1,
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.horizontal_subsampling = { 1 },
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.vertical_subsampling = { 1 },
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.bytes_per_pixel = { 3 }
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};
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static const struct planar_layout packed_4bpp_layout = {
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.num_planes = 1,
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.horizontal_subsampling = { 1 },
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.vertical_subsampling = { 1 },
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.bytes_per_pixel = { 4 }
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};
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static const struct planar_layout biplanar_yuv_420_layout = {
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.num_planes = 2,
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.horizontal_subsampling = { 1, 2 },
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.vertical_subsampling = { 1, 2 },
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.bytes_per_pixel = { 1, 2 }
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};
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static const struct planar_layout triplanar_yuv_420_layout = {
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.num_planes = 3,
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.horizontal_subsampling = { 1, 2, 2 },
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.vertical_subsampling = { 1, 2, 2 },
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.bytes_per_pixel = { 1, 1, 1 }
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};
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// clang-format on
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static const struct planar_layout *layout_from_format(uint32_t format)
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{
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switch (format) {
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case DRM_FORMAT_BGR233:
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case DRM_FORMAT_C8:
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case DRM_FORMAT_R8:
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case DRM_FORMAT_RGB332:
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return &packed_1bpp_layout;
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case DRM_FORMAT_YVU420:
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case DRM_FORMAT_YVU420_ANDROID:
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return &triplanar_yuv_420_layout;
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case DRM_FORMAT_NV12:
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case DRM_FORMAT_NV21:
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return &biplanar_yuv_420_layout;
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case DRM_FORMAT_ABGR1555:
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case DRM_FORMAT_ABGR4444:
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case DRM_FORMAT_ARGB1555:
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case DRM_FORMAT_ARGB4444:
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case DRM_FORMAT_BGR565:
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case DRM_FORMAT_BGRA4444:
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case DRM_FORMAT_BGRA5551:
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case DRM_FORMAT_BGRX4444:
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case DRM_FORMAT_BGRX5551:
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case DRM_FORMAT_GR88:
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case DRM_FORMAT_RG88:
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case DRM_FORMAT_RGB565:
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case DRM_FORMAT_RGBA4444:
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case DRM_FORMAT_RGBA5551:
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case DRM_FORMAT_RGBX4444:
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case DRM_FORMAT_RGBX5551:
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case DRM_FORMAT_UYVY:
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case DRM_FORMAT_VYUY:
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case DRM_FORMAT_XBGR1555:
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case DRM_FORMAT_XBGR4444:
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case DRM_FORMAT_XRGB1555:
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case DRM_FORMAT_XRGB4444:
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case DRM_FORMAT_YUYV:
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case DRM_FORMAT_YVYU:
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return &packed_2bpp_layout;
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case DRM_FORMAT_BGR888:
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case DRM_FORMAT_RGB888:
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return &packed_3bpp_layout;
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case DRM_FORMAT_ABGR2101010:
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case DRM_FORMAT_ABGR8888:
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case DRM_FORMAT_ARGB2101010:
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case DRM_FORMAT_ARGB8888:
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case DRM_FORMAT_AYUV:
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case DRM_FORMAT_BGRA1010102:
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case DRM_FORMAT_BGRA8888:
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case DRM_FORMAT_BGRX1010102:
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case DRM_FORMAT_BGRX8888:
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case DRM_FORMAT_RGBA1010102:
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case DRM_FORMAT_RGBA8888:
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case DRM_FORMAT_RGBX1010102:
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case DRM_FORMAT_RGBX8888:
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case DRM_FORMAT_XBGR2101010:
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case DRM_FORMAT_XBGR8888:
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case DRM_FORMAT_XRGB2101010:
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case DRM_FORMAT_XRGB8888:
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return &packed_4bpp_layout;
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default:
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drv_log("UNKNOWN FORMAT %d\n", format);
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return NULL;
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}
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}
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size_t drv_num_planes_from_format(uint32_t format)
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{
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const struct planar_layout *layout = layout_from_format(format);
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/*
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* drv_bo_new calls this function early to query number of planes and
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* considers 0 planes to mean unknown format, so we have to support
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* that. All other layout_from_format() queries can assume that the
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* format is supported and that the return value is non-NULL.
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*/
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return layout ? layout->num_planes : 0;
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}
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uint32_t drv_height_from_format(uint32_t format, uint32_t height, size_t plane)
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{
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const struct planar_layout *layout = layout_from_format(format);
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assert(plane < layout->num_planes);
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return DIV_ROUND_UP(height, layout->vertical_subsampling[plane]);
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}
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uint32_t drv_bytes_per_pixel_from_format(uint32_t format, size_t plane)
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{
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const struct planar_layout *layout = layout_from_format(format);
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assert(plane < layout->num_planes);
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return layout->bytes_per_pixel[plane];
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}
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/*
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* This function returns the stride for a given format, width and plane.
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*/
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uint32_t drv_stride_from_format(uint32_t format, uint32_t width, size_t plane)
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{
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const struct planar_layout *layout = layout_from_format(format);
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assert(plane < layout->num_planes);
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uint32_t plane_width = DIV_ROUND_UP(width, layout->horizontal_subsampling[plane]);
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uint32_t stride = plane_width * layout->bytes_per_pixel[plane];
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/*
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* The stride of Android YV12 buffers is required to be aligned to 16 bytes
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* (see <system/graphics.h>).
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*/
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if (format == DRM_FORMAT_YVU420_ANDROID)
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stride = (plane == 0) ? ALIGN(stride, 32) : ALIGN(stride, 16);
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return stride;
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}
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uint32_t drv_size_from_format(uint32_t format, uint32_t stride, uint32_t height, size_t plane)
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{
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return stride * drv_height_from_format(format, height, plane);
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}
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static uint32_t subsample_stride(uint32_t stride, uint32_t format, size_t plane)
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{
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if (plane != 0) {
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switch (format) {
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case DRM_FORMAT_YVU420:
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case DRM_FORMAT_YVU420_ANDROID:
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stride = DIV_ROUND_UP(stride, 2);
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break;
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}
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}
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return stride;
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}
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/*
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* This function fills in the buffer object given the driver aligned stride of
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* the first plane, height and a format. This function assumes there is just
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* one kernel buffer per buffer object.
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*/
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int drv_bo_from_format(struct bo *bo, uint32_t stride, uint32_t aligned_height, uint32_t format)
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{
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size_t p, num_planes;
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uint32_t offset = 0;
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num_planes = drv_num_planes_from_format(format);
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assert(num_planes);
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/*
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* HAL_PIXEL_FORMAT_YV12 requires that (see <system/graphics.h>):
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* - the aligned height is same as the buffer's height.
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* - the chroma stride is 16 bytes aligned, i.e., the luma's strides
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* is 32 bytes aligned.
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*/
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if (format == DRM_FORMAT_YVU420_ANDROID) {
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assert(aligned_height == bo->height);
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assert(stride == ALIGN(stride, 32));
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}
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for (p = 0; p < num_planes; p++) {
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bo->strides[p] = subsample_stride(stride, format, p);
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bo->sizes[p] = drv_size_from_format(format, bo->strides[p], aligned_height, p);
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bo->offsets[p] = offset;
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offset += bo->sizes[p];
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}
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bo->total_size = offset;
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return 0;
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}
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int drv_dumb_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
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uint64_t use_flags)
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{
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int ret;
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size_t plane;
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uint32_t aligned_width, aligned_height;
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struct drm_mode_create_dumb create_dumb;
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aligned_width = width;
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aligned_height = height;
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if (format == DRM_FORMAT_YVU420_ANDROID) {
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/*
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* Align width to 32 pixels, so chroma strides are 16 bytes as
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* Android requires.
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*/
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aligned_width = ALIGN(width, 32);
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}
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if (format == DRM_FORMAT_YVU420_ANDROID || format == DRM_FORMAT_YVU420) {
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aligned_height = 3 * DIV_ROUND_UP(height, 2);
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}
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memset(&create_dumb, 0, sizeof(create_dumb));
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create_dumb.height = aligned_height;
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create_dumb.width = aligned_width;
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create_dumb.bpp = layout_from_format(format)->bytes_per_pixel[0] * 8;
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create_dumb.flags = 0;
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ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb);
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if (ret) {
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drv_log("DRM_IOCTL_MODE_CREATE_DUMB failed (%d, %d)\n", bo->drv->fd, errno);
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return ret;
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}
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drv_bo_from_format(bo, create_dumb.pitch, height, format);
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for (plane = 0; plane < bo->num_planes; plane++)
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bo->handles[plane].u32 = create_dumb.handle;
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bo->total_size = create_dumb.size;
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return 0;
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}
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int drv_dumb_bo_destroy(struct bo *bo)
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{
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struct drm_mode_destroy_dumb destroy_dumb;
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int ret;
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memset(&destroy_dumb, 0, sizeof(destroy_dumb));
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destroy_dumb.handle = bo->handles[0].u32;
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ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_dumb);
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if (ret) {
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drv_log("DRM_IOCTL_MODE_DESTROY_DUMB failed (handle=%x)\n", bo->handles[0].u32);
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return ret;
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}
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return 0;
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}
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int drv_gem_bo_destroy(struct bo *bo)
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{
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struct drm_gem_close gem_close;
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int ret, error = 0;
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size_t plane, i;
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for (plane = 0; plane < bo->num_planes; plane++) {
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for (i = 0; i < plane; i++)
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if (bo->handles[i].u32 == bo->handles[plane].u32)
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break;
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/* Make sure close hasn't already been called on this handle */
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if (i != plane)
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continue;
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memset(&gem_close, 0, sizeof(gem_close));
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gem_close.handle = bo->handles[plane].u32;
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ret = drmIoctl(bo->drv->fd, DRM_IOCTL_GEM_CLOSE, &gem_close);
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if (ret) {
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drv_log("DRM_IOCTL_GEM_CLOSE failed (handle=%x) error %d\n",
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bo->handles[plane].u32, ret);
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error = ret;
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}
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}
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return error;
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}
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int drv_prime_bo_import(struct bo *bo, struct drv_import_fd_data *data)
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{
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int ret;
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size_t plane;
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struct drm_prime_handle prime_handle;
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for (plane = 0; plane < bo->num_planes; plane++) {
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memset(&prime_handle, 0, sizeof(prime_handle));
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prime_handle.fd = data->fds[plane];
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ret = drmIoctl(bo->drv->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &prime_handle);
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if (ret) {
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drv_log("DRM_IOCTL_PRIME_FD_TO_HANDLE failed (fd=%u)\n", prime_handle.fd);
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/*
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* Need to call GEM close on planes that were opened,
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* if any. Adjust the num_planes variable to be the
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* plane that failed, so GEM close will be called on
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* planes before that plane.
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*/
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bo->num_planes = plane;
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drv_gem_bo_destroy(bo);
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return ret;
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}
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bo->handles[plane].u32 = prime_handle.handle;
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}
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for (plane = 0; plane < bo->num_planes; plane++) {
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pthread_mutex_lock(&bo->drv->driver_lock);
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drv_increment_reference_count(bo->drv, bo, plane);
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pthread_mutex_unlock(&bo->drv->driver_lock);
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}
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return 0;
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}
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void *drv_dumb_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
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{
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int ret;
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size_t i;
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struct drm_mode_map_dumb map_dumb;
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memset(&map_dumb, 0, sizeof(map_dumb));
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map_dumb.handle = bo->handles[plane].u32;
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ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MODE_MAP_DUMB, &map_dumb);
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if (ret) {
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drv_log("DRM_IOCTL_MODE_MAP_DUMB failed\n");
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return MAP_FAILED;
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}
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for (i = 0; i < bo->num_planes; i++)
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if (bo->handles[i].u32 == bo->handles[plane].u32)
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vma->length += bo->sizes[i];
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return mmap(0, vma->length, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd,
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map_dumb.offset);
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}
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int drv_bo_munmap(struct bo *bo, struct vma *vma)
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{
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return munmap(vma->addr, vma->length);
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}
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int drv_mapping_destroy(struct bo *bo)
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{
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int ret;
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size_t plane;
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struct mapping *mapping;
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uint32_t idx;
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/*
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* This function is called right before the buffer is destroyed. It will free any mappings
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* associated with the buffer.
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*/
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idx = 0;
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for (plane = 0; plane < bo->num_planes; plane++) {
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while (idx < drv_array_size(bo->drv->mappings)) {
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mapping = (struct mapping *)drv_array_at_idx(bo->drv->mappings, idx);
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if (mapping->vma->handle != bo->handles[plane].u32) {
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idx++;
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continue;
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}
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if (!--mapping->vma->refcount) {
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ret = bo->drv->backend->bo_unmap(bo, mapping->vma);
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if (ret) {
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drv_log("munmap failed\n");
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return ret;
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}
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free(mapping->vma);
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}
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/* This shrinks and shifts the array, so don't increment idx. */
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drv_array_remove(bo->drv->mappings, idx);
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}
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}
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return 0;
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}
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int drv_get_prot(uint32_t map_flags)
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{
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return (BO_MAP_WRITE & map_flags) ? PROT_WRITE | PROT_READ : PROT_READ;
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}
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uintptr_t drv_get_reference_count(struct driver *drv, struct bo *bo, size_t plane)
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{
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void *count;
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uintptr_t num = 0;
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if (!drmHashLookup(drv->buffer_table, bo->handles[plane].u32, &count))
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num = (uintptr_t)(count);
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return num;
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}
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void drv_increment_reference_count(struct driver *drv, struct bo *bo, size_t plane)
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{
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uintptr_t num = drv_get_reference_count(drv, bo, plane);
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/* If a value isn't in the table, drmHashDelete is a no-op */
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drmHashDelete(drv->buffer_table, bo->handles[plane].u32);
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drmHashInsert(drv->buffer_table, bo->handles[plane].u32, (void *)(num + 1));
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}
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void drv_decrement_reference_count(struct driver *drv, struct bo *bo, size_t plane)
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{
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uintptr_t num = drv_get_reference_count(drv, bo, plane);
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drmHashDelete(drv->buffer_table, bo->handles[plane].u32);
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if (num > 0)
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drmHashInsert(drv->buffer_table, bo->handles[plane].u32, (void *)(num - 1));
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}
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uint32_t drv_log_base2(uint32_t value)
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{
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int ret = 0;
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while (value >>= 1)
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++ret;
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return ret;
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}
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void drv_add_combinations(struct driver *drv, const uint32_t *formats, uint32_t num_formats,
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struct format_metadata *metadata, uint64_t use_flags)
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{
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uint32_t i;
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for (i = 0; i < num_formats; i++) {
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struct combination combo = { .format = formats[i],
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.metadata = *metadata,
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.use_flags = use_flags };
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drv_array_append(drv->combos, &combo);
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}
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}
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void drv_modify_combination(struct driver *drv, uint32_t format, struct format_metadata *metadata,
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uint64_t use_flags)
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{
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uint32_t i;
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struct combination *combo;
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/* Attempts to add the specified flags to an existing combination. */
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for (i = 0; i < drv_array_size(drv->combos); i++) {
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combo = (struct combination *)drv_array_at_idx(drv->combos, i);
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if (combo->format == format && combo->metadata.tiling == metadata->tiling &&
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combo->metadata.modifier == metadata->modifier)
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combo->use_flags |= use_flags;
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}
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}
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struct drv_array *drv_query_kms(struct driver *drv)
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{
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struct drv_array *kms_items;
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uint64_t plane_type, use_flag;
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uint32_t i, j, k;
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drmModePlanePtr plane;
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drmModePropertyPtr prop;
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drmModePlaneResPtr resources;
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drmModeObjectPropertiesPtr props;
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kms_items = drv_array_init(sizeof(struct kms_item));
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if (!kms_items)
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goto out;
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|
/*
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* The ability to return universal planes is only complete on
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* ChromeOS kernel versions >= v3.18. The SET_CLIENT_CAP ioctl
|
* therefore might return an error code, so don't check it. If it
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* fails, it'll just return the plane list as overlay planes, which is
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* fine in our case (our drivers already have cursor bits set).
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* modetest in libdrm does the same thing.
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*/
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drmSetClientCap(drv->fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
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resources = drmModeGetPlaneResources(drv->fd);
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if (!resources)
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goto out;
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for (i = 0; i < resources->count_planes; i++) {
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plane = drmModeGetPlane(drv->fd, resources->planes[i]);
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if (!plane)
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goto out;
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props = drmModeObjectGetProperties(drv->fd, plane->plane_id, DRM_MODE_OBJECT_PLANE);
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if (!props)
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goto out;
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for (j = 0; j < props->count_props; j++) {
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prop = drmModeGetProperty(drv->fd, props->props[j]);
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if (prop) {
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if (strcmp(prop->name, "type") == 0) {
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plane_type = props->prop_values[j];
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}
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drmModeFreeProperty(prop);
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}
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}
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switch (plane_type) {
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case DRM_PLANE_TYPE_OVERLAY:
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case DRM_PLANE_TYPE_PRIMARY:
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use_flag = BO_USE_SCANOUT;
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break;
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case DRM_PLANE_TYPE_CURSOR:
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use_flag = BO_USE_CURSOR;
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break;
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default:
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assert(0);
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}
|
|
for (j = 0; j < plane->count_formats; j++) {
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bool found = false;
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for (k = 0; k < drv_array_size(kms_items); k++) {
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struct kms_item *item = drv_array_at_idx(kms_items, k);
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if (item->format == plane->formats[j] &&
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item->modifier == DRM_FORMAT_MOD_LINEAR) {
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item->use_flags |= use_flag;
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found = true;
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break;
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}
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}
|
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if (!found) {
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struct kms_item item = { .format = plane->formats[j],
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.modifier = DRM_FORMAT_MOD_LINEAR,
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.use_flags = use_flag };
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drv_array_append(kms_items, &item);
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}
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}
|
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drmModeFreeObjectProperties(props);
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drmModeFreePlane(plane);
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}
|
|
drmModeFreePlaneResources(resources);
|
out:
|
if (kms_items && !drv_array_size(kms_items)) {
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drv_array_destroy(kms_items);
|
return NULL;
|
}
|
|
return kms_items;
|
}
|
|
int drv_modify_linear_combinations(struct driver *drv)
|
{
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uint32_t i, j;
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struct kms_item *item;
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struct combination *combo;
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struct drv_array *kms_items;
|
|
/*
|
* All current drivers can scanout linear XRGB8888/ARGB8888 as a primary
|
* plane and as a cursor. Some drivers don't support
|
* drmModeGetPlaneResources, so add the combination here. Note that the
|
* kernel disregards the alpha component of ARGB unless it's an overlay
|
* plane.
|
*/
|
drv_modify_combination(drv, DRM_FORMAT_XRGB8888, &LINEAR_METADATA,
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BO_USE_CURSOR | BO_USE_SCANOUT);
|
drv_modify_combination(drv, DRM_FORMAT_ARGB8888, &LINEAR_METADATA,
|
BO_USE_CURSOR | BO_USE_SCANOUT);
|
|
kms_items = drv_query_kms(drv);
|
if (!kms_items)
|
return 0;
|
|
for (i = 0; i < drv_array_size(kms_items); i++) {
|
item = (struct kms_item *)drv_array_at_idx(kms_items, i);
|
for (j = 0; j < drv_array_size(drv->combos); j++) {
|
combo = drv_array_at_idx(drv->combos, j);
|
if (item->format == combo->format)
|
combo->use_flags |= BO_USE_SCANOUT;
|
}
|
}
|
|
drv_array_destroy(kms_items);
|
return 0;
|
}
|
|
/*
|
* Pick the best modifier from modifiers, according to the ordering
|
* given by modifier_order.
|
*/
|
uint64_t drv_pick_modifier(const uint64_t *modifiers, uint32_t count,
|
const uint64_t *modifier_order, uint32_t order_count)
|
{
|
uint32_t i, j;
|
|
for (i = 0; i < order_count; i++) {
|
for (j = 0; j < count; j++) {
|
if (modifiers[j] == modifier_order[i]) {
|
return modifiers[j];
|
}
|
}
|
}
|
|
return DRM_FORMAT_MOD_LINEAR;
|
}
|
