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-rw-r--r--helpers.c537
1 files changed, 537 insertions, 0 deletions
diff --git a/helpers.c b/helpers.c
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+++ b/helpers.c
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+/*
+ * Copyright 2014 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+#include "drv_priv.h"
+#include "helpers.h"
+#include "util.h"
+
+static uint32_t subsample_stride(uint32_t stride, uint32_t format, size_t plane)
+{
+
+ if (plane != 0) {
+ switch (format) {
+ case DRM_FORMAT_YVU420:
+ case DRM_FORMAT_YVU420_ANDROID:
+ stride = DIV_ROUND_UP(stride, 2);
+ break;
+ }
+ }
+
+ return stride;
+}
+
+static uint32_t bpp_from_format(uint32_t format, size_t plane)
+{
+ assert(plane < drv_num_planes_from_format(format));
+
+ switch (format) {
+ case DRM_FORMAT_BGR233:
+ case DRM_FORMAT_C8:
+ case DRM_FORMAT_R8:
+ case DRM_FORMAT_RGB332:
+ case DRM_FORMAT_YVU420:
+ case DRM_FORMAT_YVU420_ANDROID:
+ return 8;
+
+ case DRM_FORMAT_NV12:
+ case DRM_FORMAT_NV21:
+ return (plane == 0) ? 8 : 4;
+
+ case DRM_FORMAT_ABGR1555:
+ case DRM_FORMAT_ABGR4444:
+ case DRM_FORMAT_ARGB1555:
+ case DRM_FORMAT_ARGB4444:
+ case DRM_FORMAT_BGR565:
+ case DRM_FORMAT_BGRA4444:
+ case DRM_FORMAT_BGRA5551:
+ case DRM_FORMAT_BGRX4444:
+ case DRM_FORMAT_BGRX5551:
+ case DRM_FORMAT_GR88:
+ case DRM_FORMAT_RG88:
+ case DRM_FORMAT_RGB565:
+ case DRM_FORMAT_RGBA4444:
+ case DRM_FORMAT_RGBA5551:
+ case DRM_FORMAT_RGBX4444:
+ case DRM_FORMAT_RGBX5551:
+ case DRM_FORMAT_UYVY:
+ case DRM_FORMAT_VYUY:
+ case DRM_FORMAT_XBGR1555:
+ case DRM_FORMAT_XBGR4444:
+ case DRM_FORMAT_XRGB1555:
+ case DRM_FORMAT_XRGB4444:
+ case DRM_FORMAT_YUYV:
+ case DRM_FORMAT_YVYU:
+ return 16;
+
+ case DRM_FORMAT_BGR888:
+ case DRM_FORMAT_RGB888:
+ return 24;
+
+ case DRM_FORMAT_ABGR2101010:
+ case DRM_FORMAT_ABGR8888:
+ case DRM_FORMAT_ARGB2101010:
+ case DRM_FORMAT_ARGB8888:
+ case DRM_FORMAT_AYUV:
+ case DRM_FORMAT_BGRA1010102:
+ case DRM_FORMAT_BGRA8888:
+ case DRM_FORMAT_BGRX1010102:
+ case DRM_FORMAT_BGRX8888:
+ case DRM_FORMAT_RGBA1010102:
+ case DRM_FORMAT_RGBA8888:
+ case DRM_FORMAT_RGBX1010102:
+ case DRM_FORMAT_RGBX8888:
+ case DRM_FORMAT_XBGR2101010:
+ case DRM_FORMAT_XBGR8888:
+ case DRM_FORMAT_XRGB2101010:
+ case DRM_FORMAT_XRGB8888:
+ return 32;
+ }
+
+ fprintf(stderr, "drv: UNKNOWN FORMAT %d\n", format);
+ return 0;
+}
+
+uint32_t drv_bo_get_stride_in_pixels(struct bo *bo)
+{
+ uint32_t bytes_per_pixel = DIV_ROUND_UP(bpp_from_format(bo->format, 0), 8);
+ return DIV_ROUND_UP(bo->strides[0], bytes_per_pixel);
+}
+
+/*
+ * This function returns the stride for a given format, width and plane.
+ */
+uint32_t drv_stride_from_format(uint32_t format, uint32_t width, size_t plane)
+{
+ uint32_t stride = DIV_ROUND_UP(width * bpp_from_format(format, plane), 8);
+
+ /*
+ * The stride of Android YV12 buffers is required to be aligned to 16 bytes
+ * (see <system/graphics.h>).
+ */
+ if (format == DRM_FORMAT_YVU420_ANDROID)
+ stride = (plane == 0) ? ALIGN(stride, 32) : ALIGN(stride, 16);
+
+ return stride;
+}
+
+/*
+ * This function fills in the buffer object given the driver aligned stride of
+ * the first plane, height and a format. This function assumes there is just
+ * one kernel buffer per buffer object.
+ */
+int drv_bo_from_format(struct bo *bo, uint32_t stride, uint32_t aligned_height, uint32_t format)
+{
+
+ size_t p, num_planes;
+ uint32_t offset = 0;
+
+ num_planes = drv_num_planes_from_format(format);
+ assert(num_planes);
+ bo->total_size = 0;
+
+ for (p = 0; p < num_planes; p++) {
+ bo->strides[p] = subsample_stride(stride, format, p);
+ bo->sizes[p] = drv_size_from_format(format, bo->strides[p], bo->height, p);
+ bo->offsets[p] = offset;
+ offset += bo->sizes[p];
+ bo->total_size += drv_size_from_format(format, bo->strides[p], aligned_height, p);
+ }
+
+ return 0;
+}
+
+int drv_dumb_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
+ uint32_t flags)
+{
+ int ret;
+ size_t plane;
+ uint32_t aligned_width, aligned_height;
+ struct drm_mode_create_dumb create_dumb;
+
+ aligned_width = width;
+ aligned_height = height;
+ if (format == DRM_FORMAT_YVU420_ANDROID) {
+ /*
+ * Align width to 32 pixels, so chroma strides are 16 bytes as
+ * Android requires.
+ */
+ aligned_width = ALIGN(width, 32);
+ aligned_height = 3 * DIV_ROUND_UP(height, 2);
+ }
+
+ memset(&create_dumb, 0, sizeof(create_dumb));
+ create_dumb.height = aligned_height;
+ create_dumb.width = aligned_width;
+ create_dumb.bpp = bpp_from_format(format, 0);
+ create_dumb.flags = 0;
+
+ ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb);
+ if (ret) {
+ fprintf(stderr, "drv: DRM_IOCTL_MODE_CREATE_DUMB failed\n");
+ return ret;
+ }
+
+ drv_bo_from_format(bo, create_dumb.pitch, height, format);
+
+ for (plane = 0; plane < bo->num_planes; plane++)
+ bo->handles[plane].u32 = create_dumb.handle;
+
+ bo->total_size = create_dumb.size;
+ return 0;
+}
+
+int drv_dumb_bo_destroy(struct bo *bo)
+{
+ struct drm_mode_destroy_dumb destroy_dumb;
+ int ret;
+
+ memset(&destroy_dumb, 0, sizeof(destroy_dumb));
+ destroy_dumb.handle = bo->handles[0].u32;
+
+ ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_dumb);
+ if (ret) {
+ fprintf(stderr, "drv: DRM_IOCTL_MODE_DESTROY_DUMB failed (handle=%x)\n",
+ bo->handles[0].u32);
+ return ret;
+ }
+
+ return 0;
+}
+
+int drv_gem_bo_destroy(struct bo *bo)
+{
+ struct drm_gem_close gem_close;
+ int ret, error = 0;
+ size_t plane, i;
+
+ for (plane = 0; plane < bo->num_planes; plane++) {
+ for (i = 0; i < plane; i++)
+ if (bo->handles[i].u32 == bo->handles[plane].u32)
+ break;
+ /* Make sure close hasn't already been called on this handle */
+ if (i != plane)
+ continue;
+
+ memset(&gem_close, 0, sizeof(gem_close));
+ gem_close.handle = bo->handles[plane].u32;
+
+ ret = drmIoctl(bo->drv->fd, DRM_IOCTL_GEM_CLOSE, &gem_close);
+ if (ret) {
+ fprintf(stderr, "drv: DRM_IOCTL_GEM_CLOSE failed (handle=%x) error %d\n",
+ bo->handles[plane].u32, ret);
+ error = ret;
+ }
+ }
+
+ return error;
+}
+
+int drv_prime_bo_import(struct bo *bo, struct drv_import_fd_data *data)
+{
+ int ret;
+ size_t plane;
+ struct drm_prime_handle prime_handle;
+
+ for (plane = 0; plane < bo->num_planes; plane++) {
+ memset(&prime_handle, 0, sizeof(prime_handle));
+ prime_handle.fd = data->fds[plane];
+
+ ret = drmIoctl(bo->drv->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &prime_handle);
+
+ if (ret) {
+ fprintf(stderr, "drv: DRM_IOCTL_PRIME_FD_TO_HANDLE failed (fd=%u)\n",
+ prime_handle.fd);
+
+ /*
+ * Need to call GEM close on planes that were opened,
+ * if any. Adjust the num_planes variable to be the
+ * plane that failed, so GEM close will be called on
+ * planes before that plane.
+ */
+ bo->num_planes = plane;
+ drv_gem_bo_destroy(bo);
+ return ret;
+ }
+
+ bo->handles[plane].u32 = prime_handle.handle;
+ }
+
+ for (plane = 0; plane < bo->num_planes; plane++) {
+ pthread_mutex_lock(&bo->drv->driver_lock);
+ drv_increment_reference_count(bo->drv, bo, plane);
+ pthread_mutex_unlock(&bo->drv->driver_lock);
+ }
+
+ return 0;
+}
+
+void *drv_dumb_bo_map(struct bo *bo, struct map_info *data, size_t plane)
+{
+ int ret;
+ size_t i;
+ struct drm_mode_map_dumb map_dumb;
+
+ memset(&map_dumb, 0, sizeof(map_dumb));
+ map_dumb.handle = bo->handles[plane].u32;
+
+ ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MODE_MAP_DUMB, &map_dumb);
+ if (ret) {
+ fprintf(stderr, "drv: DRM_IOCTL_MODE_MAP_DUMB failed \n");
+ return MAP_FAILED;
+ }
+
+ for (i = 0; i < bo->num_planes; i++)
+ if (bo->handles[i].u32 == bo->handles[plane].u32)
+ data->length += bo->sizes[i];
+
+ return mmap(0, data->length, PROT_READ | PROT_WRITE, MAP_SHARED, bo->drv->fd,
+ map_dumb.offset);
+}
+
+uintptr_t drv_get_reference_count(struct driver *drv, struct bo *bo, size_t plane)
+{
+ void *count;
+ uintptr_t num = 0;
+
+ if (!drmHashLookup(drv->buffer_table, bo->handles[plane].u32, &count))
+ num = (uintptr_t)(count);
+
+ return num;
+}
+
+void drv_increment_reference_count(struct driver *drv, struct bo *bo, size_t plane)
+{
+ uintptr_t num = drv_get_reference_count(drv, bo, plane);
+
+ /* If a value isn't in the table, drmHashDelete is a no-op */
+ drmHashDelete(drv->buffer_table, bo->handles[plane].u32);
+ drmHashInsert(drv->buffer_table, bo->handles[plane].u32, (void *)(num + 1));
+}
+
+void drv_decrement_reference_count(struct driver *drv, struct bo *bo, size_t plane)
+{
+ uintptr_t num = drv_get_reference_count(drv, bo, plane);
+
+ drmHashDelete(drv->buffer_table, bo->handles[plane].u32);
+
+ if (num > 0)
+ drmHashInsert(drv->buffer_table, bo->handles[plane].u32, (void *)(num - 1));
+}
+
+uint32_t drv_log_base2(uint32_t value)
+{
+ int ret = 0;
+
+ while (value >>= 1)
+ ++ret;
+
+ return ret;
+}
+
+int drv_add_combination(struct driver *drv, uint32_t format, struct format_metadata *metadata,
+ uint64_t usage)
+{
+ struct combinations *combos = &drv->backend->combos;
+ if (combos->size >= combos->allocations) {
+ struct combination *new_data;
+ combos->allocations *= 2;
+ new_data = realloc(combos->data, combos->allocations * sizeof(*combos->data));
+ if (!new_data)
+ return -ENOMEM;
+
+ combos->data = new_data;
+ }
+
+ combos->data[combos->size].format = format;
+ combos->data[combos->size].metadata.priority = metadata->priority;
+ combos->data[combos->size].metadata.tiling = metadata->tiling;
+ combos->data[combos->size].metadata.modifier = metadata->modifier;
+ combos->data[combos->size].usage = usage;
+ combos->size++;
+ return 0;
+}
+
+int drv_add_combinations(struct driver *drv, const uint32_t *formats, uint32_t num_formats,
+ struct format_metadata *metadata, uint64_t usage)
+{
+ int ret;
+ uint32_t i;
+ for (i = 0; i < num_formats; i++) {
+ ret = drv_add_combination(drv, formats[i], metadata, usage);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+void drv_modify_combination(struct driver *drv, uint32_t format, struct format_metadata *metadata,
+ uint64_t usage)
+{
+ uint32_t i;
+ struct combination *combo;
+ /* Attempts to add the specified usage to an existing combination. */
+ for (i = 0; i < drv->backend->combos.size; i++) {
+ combo = &drv->backend->combos.data[i];
+ if (combo->format == format && combo->metadata.tiling == metadata->tiling &&
+ combo->metadata.modifier == metadata->modifier)
+ combo->usage |= usage;
+ }
+}
+
+struct kms_item *drv_query_kms(struct driver *drv, uint32_t *num_items)
+{
+ uint64_t flag, usage;
+ struct kms_item *items;
+ uint32_t i, j, k, allocations, item_size;
+
+ drmModePlanePtr plane;
+ drmModePropertyPtr prop;
+ drmModePlaneResPtr resources;
+ drmModeObjectPropertiesPtr props;
+
+ /* Start with a power of 2 number of allocations. */
+ allocations = 2;
+ item_size = 0;
+ items = calloc(allocations, sizeof(*items));
+ if (!items)
+ goto out;
+
+ /*
+ * The ability to return universal planes is only complete on
+ * ChromeOS kernel versions >= v3.18. The SET_CLIENT_CAP ioctl
+ * therefore might return an error code, so don't check it. If it
+ * fails, it'll just return the plane list as overlay planes, which is
+ * fine in our case (our drivers already have cursor bits set).
+ * modetest in libdrm does the same thing.
+ */
+ drmSetClientCap(drv->fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
+
+ resources = drmModeGetPlaneResources(drv->fd);
+ if (!resources)
+ goto out;
+
+ for (i = 0; i < resources->count_planes; i++) {
+ plane = drmModeGetPlane(drv->fd, resources->planes[i]);
+ if (!plane)
+ goto out;
+
+ props = drmModeObjectGetProperties(drv->fd, plane->plane_id, DRM_MODE_OBJECT_PLANE);
+ if (!props)
+ goto out;
+
+ for (j = 0; j < props->count_props; j++) {
+ prop = drmModeGetProperty(drv->fd, props->props[j]);
+ if (prop) {
+ if (strcmp(prop->name, "type") == 0) {
+ flag = props->prop_values[j];
+ }
+
+ drmModeFreeProperty(prop);
+ }
+ }
+
+ switch (flag) {
+ case DRM_PLANE_TYPE_OVERLAY:
+ case DRM_PLANE_TYPE_PRIMARY:
+ usage = BO_USE_SCANOUT;
+ break;
+ case DRM_PLANE_TYPE_CURSOR:
+ usage = BO_USE_CURSOR;
+ break;
+ default:
+ assert(0);
+ }
+
+ for (j = 0; j < plane->count_formats; j++) {
+ bool found = false;
+ for (k = 0; k < item_size; k++) {
+ if (items[k].format == plane->formats[j] &&
+ items[k].modifier == DRM_FORMAT_MOD_NONE) {
+ items[k].usage |= usage;
+ found = true;
+ break;
+ }
+ }
+
+ if (!found && item_size >= allocations) {
+ struct kms_item *new_data = NULL;
+ allocations *= 2;
+ new_data = realloc(items, allocations * sizeof(*items));
+ if (!new_data) {
+ item_size = 0;
+ goto out;
+ }
+
+ items = new_data;
+ }
+
+ if (!found) {
+ items[item_size].format = plane->formats[j];
+ items[item_size].modifier = DRM_FORMAT_MOD_NONE;
+ items[item_size].usage = usage;
+ item_size++;
+ }
+ }
+
+ drmModeFreeObjectProperties(props);
+ drmModeFreePlane(plane);
+ }
+
+ drmModeFreePlaneResources(resources);
+out:
+ if (items && item_size == 0) {
+ free(items);
+ items = NULL;
+ }
+
+ *num_items = item_size;
+ return items;
+}
+
+int drv_modify_linear_combinations(struct driver *drv)
+{
+ uint32_t i, j, num_items;
+ struct kms_item *items;
+ struct combination *combo;
+
+ /*
+ * 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,
+ BO_USE_CURSOR | BO_USE_SCANOUT);
+ drv_modify_combination(drv, DRM_FORMAT_ARGB8888, &LINEAR_METADATA,
+ BO_USE_CURSOR | BO_USE_SCANOUT);
+
+ items = drv_query_kms(drv, &num_items);
+ if (!items || !num_items)
+ return 0;
+
+ for (i = 0; i < num_items; i++) {
+ for (j = 0; j < drv->backend->combos.size; j++) {
+ combo = &drv->backend->combos.data[j];
+ if (items[i].format == combo->format)
+ combo->usage |= BO_USE_SCANOUT;
+ }
+ }
+
+ free(items);
+ return 0;
+}
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