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// SPDX-License-Identifier: GPL-2.0
/*
* (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
* Author: James.Qian.Wang <james.qian.wang@arm.com>
*
*/
#include <drm/drm_device.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include "komeda_framebuffer.h"
#include "komeda_dev.h"
static void komeda_fb_destroy(struct drm_framebuffer *fb)
{
struct komeda_fb *kfb = to_kfb(fb);
u32 i;
for (i = 0; i < fb->format->num_planes; i++)
drm_gem_object_put(fb->obj[i]);
drm_framebuffer_cleanup(fb);
kfree(kfb);
}
static int komeda_fb_create_handle(struct drm_framebuffer *fb,
struct drm_file *file, u32 *handle)
{
return drm_gem_handle_create(file, fb->obj[0], handle);
}
static const struct drm_framebuffer_funcs komeda_fb_funcs = {
.destroy = komeda_fb_destroy,
.create_handle = komeda_fb_create_handle,
};
static int
komeda_fb_afbc_size_check(struct komeda_fb *kfb, struct drm_file *file,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
struct drm_framebuffer *fb = &kfb->base;
const struct drm_format_info *info = fb->format;
struct drm_gem_object *obj;
u32 alignment_w = 0, alignment_h = 0, alignment_header, n_blocks, bpp;
u64 min_size;
obj = drm_gem_object_lookup(file, mode_cmd->handles[0]);
if (!obj) {
DRM_DEBUG_KMS("Failed to lookup GEM object\n");
return -ENOENT;
}
switch (fb->modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK) {
case AFBC_FORMAT_MOD_BLOCK_SIZE_32x8:
alignment_w = 32;
alignment_h = 8;
break;
case AFBC_FORMAT_MOD_BLOCK_SIZE_16x16:
alignment_w = 16;
alignment_h = 16;
break;
default:
WARN(1, "Invalid AFBC_FORMAT_MOD_BLOCK_SIZE: %lld.\n",
fb->modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK);
break;
}
/* tiled header afbc */
if (fb->modifier & AFBC_FORMAT_MOD_TILED) {
alignment_w *= AFBC_TH_LAYOUT_ALIGNMENT;
alignment_h *= AFBC_TH_LAYOUT_ALIGNMENT;
alignment_header = AFBC_TH_BODY_START_ALIGNMENT;
} else {
alignment_header = AFBC_BODY_START_ALIGNMENT;
}
kfb->aligned_w = ALIGN(fb->width, alignment_w);
kfb->aligned_h = ALIGN(fb->height, alignment_h);
if (fb->offsets[0] % alignment_header) {
DRM_DEBUG_KMS("afbc offset alignment check failed.\n");
goto check_failed;
}
n_blocks = (kfb->aligned_w * kfb->aligned_h) / AFBC_SUPERBLK_PIXELS;
kfb->offset_payload = ALIGN(n_blocks * AFBC_HEADER_SIZE,
alignment_header);
bpp = komeda_get_afbc_format_bpp(info, fb->modifier);
kfb->afbc_size = kfb->offset_payload + n_blocks *
ALIGN(bpp * AFBC_SUPERBLK_PIXELS / 8,
AFBC_SUPERBLK_ALIGNMENT);
min_size = kfb->afbc_size + fb->offsets[0];
if (min_size > obj->size) {
DRM_DEBUG_KMS("afbc size check failed, obj_size: 0x%zx. min_size 0x%llx.\n",
obj->size, min_size);
goto check_failed;
}
fb->obj[0] = obj;
return 0;
check_failed:
drm_gem_object_put(obj);
return -EINVAL;
}
static int
komeda_fb_none_afbc_size_check(struct komeda_dev *mdev, struct komeda_fb *kfb,
struct drm_file *file,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
struct drm_framebuffer *fb = &kfb->base;
const struct drm_format_info *info = fb->format;
struct drm_gem_object *obj;
u32 i, block_h;
u64 min_size;
if (komeda_fb_check_src_coords(kfb, 0, 0, fb->width, fb->height))
return -EINVAL;
for (i = 0; i < info->num_planes; i++) {
obj = drm_gem_object_lookup(file, mode_cmd->handles[i]);
if (!obj) {
DRM_DEBUG_KMS("Failed to lookup GEM object\n");
return -ENOENT;
}
fb->obj[i] = obj;
block_h = drm_format_info_block_height(info, i);
if ((fb->pitches[i] * block_h) % mdev->chip.bus_width) {
DRM_DEBUG_KMS("Pitch[%d]: 0x%x doesn't align to 0x%x\n",
i, fb->pitches[i], mdev->chip.bus_width);
return -EINVAL;
}
min_size = komeda_fb_get_pixel_addr(kfb, 0, fb->height, i)
- to_drm_gem_cma_obj(obj)->paddr;
if (obj->size < min_size) {
DRM_DEBUG_KMS("The fb->obj[%d] size: 0x%zx lower than the minimum requirement: 0x%llx.\n",
i, obj->size, min_size);
return -EINVAL;
}
}
if (fb->format->num_planes == 3) {
if (fb->pitches[1] != fb->pitches[2]) {
DRM_DEBUG_KMS("The pitch[1] and [2] are not same\n");
return -EINVAL;
}
}
return 0;
}
struct drm_framebuffer *
komeda_fb_create(struct drm_device *dev, struct drm_file *file,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
struct komeda_dev *mdev = dev->dev_private;
struct komeda_fb *kfb;
int ret = 0, i;
kfb = kzalloc(sizeof(*kfb), GFP_KERNEL);
if (!kfb)
return ERR_PTR(-ENOMEM);
kfb->format_caps = komeda_get_format_caps(&mdev->fmt_tbl,
mode_cmd->pixel_format,
mode_cmd->modifier[0]);
if (!kfb->format_caps) {
DRM_DEBUG_KMS("FMT %x is not supported.\n",
mode_cmd->pixel_format);
kfree(kfb);
return ERR_PTR(-EINVAL);
}
drm_helper_mode_fill_fb_struct(dev, &kfb->base, mode_cmd);
if (kfb->base.modifier)
ret = komeda_fb_afbc_size_check(kfb, file, mode_cmd);
else
ret = komeda_fb_none_afbc_size_check(mdev, kfb, file, mode_cmd);
if (ret < 0)
goto err_cleanup;
ret = drm_framebuffer_init(dev, &kfb->base, &komeda_fb_funcs);
if (ret < 0) {
DRM_DEBUG_KMS("failed to initialize fb\n");
goto err_cleanup;
}
kfb->is_va = mdev->iommu ? true : false;
return &kfb->base;
err_cleanup:
for (i = 0; i < kfb->base.format->num_planes; i++)
drm_gem_object_put(kfb->base.obj[i]);
kfree(kfb);
return ERR_PTR(ret);
}
int komeda_fb_check_src_coords(const struct komeda_fb *kfb,
u32 src_x, u32 src_y, u32 src_w, u32 src_h)
{
const struct drm_framebuffer *fb = &kfb->base;
const struct drm_format_info *info = fb->format;
u32 block_w = drm_format_info_block_width(fb->format, 0);
u32 block_h = drm_format_info_block_height(fb->format, 0);
if ((src_x + src_w > fb->width) || (src_y + src_h > fb->height)) {
DRM_DEBUG_ATOMIC("Invalid source coordinate.\n");
return -EINVAL;
}
if ((src_x % info->hsub) || (src_w % info->hsub) ||
(src_y % info->vsub) || (src_h % info->vsub)) {
DRM_DEBUG_ATOMIC("Wrong subsampling dimension x:%d, y:%d, w:%d, h:%d for format: %x.\n",
src_x, src_y, src_w, src_h, info->format);
return -EINVAL;
}
if ((src_x % block_w) || (src_w % block_w) ||
(src_y % block_h) || (src_h % block_h)) {
DRM_DEBUG_ATOMIC("x:%d, y:%d, w:%d, h:%d should be multiple of block_w/h for format: %x.\n",
src_x, src_y, src_w, src_h, info->format);
return -EINVAL;
}
return 0;
}
dma_addr_t
komeda_fb_get_pixel_addr(struct komeda_fb *kfb, int x, int y, int plane)
{
struct drm_framebuffer *fb = &kfb->base;
const struct drm_gem_cma_object *obj;
u32 offset, plane_x, plane_y, block_w, block_sz;
if (plane >= fb->format->num_planes) {
DRM_DEBUG_KMS("Out of max plane num.\n");
return -EINVAL;
}
obj = drm_fb_cma_get_gem_obj(fb, plane);
offset = fb->offsets[plane];
if (!fb->modifier) {
block_w = drm_format_info_block_width(fb->format, plane);
block_sz = fb->format->char_per_block[plane];
plane_x = x / (plane ? fb->format->hsub : 1);
plane_y = y / (plane ? fb->format->vsub : 1);
offset += (plane_x / block_w) * block_sz
+ plane_y * fb->pitches[plane];
}
return obj->paddr + offset;
}
/* if the fb can be supported by a specific layer */
bool komeda_fb_is_layer_supported(struct komeda_fb *kfb, u32 layer_type,
u32 rot)
{
struct drm_framebuffer *fb = &kfb->base;
struct komeda_dev *mdev = fb->dev->dev_private;
u32 fourcc = fb->format->format;
u64 modifier = fb->modifier;
bool supported;
supported = komeda_format_mod_supported(&mdev->fmt_tbl, layer_type,
fourcc, modifier, rot);
if (!supported)
DRM_DEBUG_ATOMIC("Layer TYPE: %d doesn't support fb FMT: %p4cc with modifier: 0x%llx.\n",
layer_type, &fourcc, modifier);
return supported;
}
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