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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*/
#include <drm/drm_crtc.h>
#include <drm/drm_damage_helper.h>
#include <drm/drm_file.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_probe_helper.h>
#include "msm_drv.h"
#include "msm_kms.h"
#include "msm_gem.h"
struct msm_framebuffer {
struct drm_framebuffer base;
const struct msm_format *format;
/* Count of # of attached planes which need dirtyfb: */
refcount_t dirtyfb;
/* Framebuffer per-plane address, if pinned, else zero: */
uint64_t iova[DRM_FORMAT_MAX_PLANES];
atomic_t prepare_count;
};
#define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base)
static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos);
static int msm_framebuffer_dirtyfb(struct drm_framebuffer *fb,
struct drm_file *file_priv, unsigned int flags,
unsigned int color, struct drm_clip_rect *clips,
unsigned int num_clips)
{
struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
/* If this fb is not used on any display requiring pixel data to be
* flushed, then skip dirtyfb
*/
if (refcount_read(&msm_fb->dirtyfb) == 1)
return 0;
return drm_atomic_helper_dirtyfb(fb, file_priv, flags, color,
clips, num_clips);
}
static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {
.create_handle = drm_gem_fb_create_handle,
.destroy = drm_gem_fb_destroy,
.dirty = msm_framebuffer_dirtyfb,
};
#ifdef CONFIG_DEBUG_FS
void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
{
struct msm_gem_stats stats = {};
int i, n = fb->format->num_planes;
seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",
fb->width, fb->height, (char *)&fb->format->format,
drm_framebuffer_read_refcount(fb), fb->base.id);
for (i = 0; i < n; i++) {
seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
i, fb->offsets[i], fb->pitches[i]);
msm_gem_describe(fb->obj[i], m, &stats);
}
}
#endif
/* prepare/pin all the fb's bo's for scanout.
*/
int msm_framebuffer_prepare(struct drm_framebuffer *fb,
struct msm_gem_address_space *aspace,
bool needs_dirtyfb)
{
struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
int ret, i, n = fb->format->num_planes;
if (needs_dirtyfb)
refcount_inc(&msm_fb->dirtyfb);
atomic_inc(&msm_fb->prepare_count);
for (i = 0; i < n; i++) {
ret = msm_gem_get_and_pin_iova(fb->obj[i], aspace, &msm_fb->iova[i]);
drm_dbg_state(fb->dev, "FB[%u]: iova[%d]: %08llx (%d)",
fb->base.id, i, msm_fb->iova[i], ret);
if (ret)
return ret;
}
return 0;
}
void msm_framebuffer_cleanup(struct drm_framebuffer *fb,
struct msm_gem_address_space *aspace,
bool needed_dirtyfb)
{
struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
int i, n = fb->format->num_planes;
if (needed_dirtyfb)
refcount_dec(&msm_fb->dirtyfb);
for (i = 0; i < n; i++)
msm_gem_unpin_iova(fb->obj[i], aspace);
if (!atomic_dec_return(&msm_fb->prepare_count))
memset(msm_fb->iova, 0, sizeof(msm_fb->iova));
}
uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb,
struct msm_gem_address_space *aspace, int plane)
{
struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
return msm_fb->iova[plane] + fb->offsets[plane];
}
struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane)
{
return drm_gem_fb_get_obj(fb, plane);
}
const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb)
{
struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
return msm_fb->format;
}
struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev,
struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
{
const struct drm_format_info *info = drm_get_format_info(dev,
mode_cmd);
struct drm_gem_object *bos[4] = {0};
struct drm_framebuffer *fb;
int ret, i, n = info->num_planes;
for (i = 0; i < n; i++) {
bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
if (!bos[i]) {
ret = -ENXIO;
goto out_unref;
}
}
fb = msm_framebuffer_init(dev, mode_cmd, bos);
if (IS_ERR(fb)) {
ret = PTR_ERR(fb);
goto out_unref;
}
return fb;
out_unref:
for (i = 0; i < n; i++)
drm_gem_object_put(bos[i]);
return ERR_PTR(ret);
}
static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
{
const struct drm_format_info *info = drm_get_format_info(dev,
mode_cmd);
struct msm_drm_private *priv = dev->dev_private;
struct msm_kms *kms = priv->kms;
struct msm_framebuffer *msm_fb = NULL;
struct drm_framebuffer *fb;
const struct msm_format *format;
int ret, i, n;
drm_dbg_state(dev, "create framebuffer: mode_cmd=%p (%dx%d@%4.4s)",
mode_cmd, mode_cmd->width, mode_cmd->height,
(char *)&mode_cmd->pixel_format);
n = info->num_planes;
format = kms->funcs->get_format(kms, mode_cmd->pixel_format,
mode_cmd->modifier[0]);
if (!format) {
DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %4.4s\n",
(char *)&mode_cmd->pixel_format);
ret = -EINVAL;
goto fail;
}
msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL);
if (!msm_fb) {
ret = -ENOMEM;
goto fail;
}
fb = &msm_fb->base;
msm_fb->format = format;
if (n > ARRAY_SIZE(fb->obj)) {
ret = -EINVAL;
goto fail;
}
for (i = 0; i < n; i++) {
unsigned int width = mode_cmd->width / (i ? info->hsub : 1);
unsigned int height = mode_cmd->height / (i ? info->vsub : 1);
unsigned int min_size;
min_size = (height - 1) * mode_cmd->pitches[i]
+ width * info->cpp[i]
+ mode_cmd->offsets[i];
if (bos[i]->size < min_size) {
ret = -EINVAL;
goto fail;
}
msm_fb->base.obj[i] = bos[i];
}
drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs);
if (ret) {
DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret);
goto fail;
}
refcount_set(&msm_fb->dirtyfb, 1);
drm_dbg_state(dev, "create: FB ID: %d (%p)", fb->base.id, fb);
return fb;
fail:
kfree(msm_fb);
return ERR_PTR(ret);
}
struct drm_framebuffer *
msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format)
{
struct drm_mode_fb_cmd2 mode_cmd = {
.pixel_format = format,
.width = w,
.height = h,
.pitches = { p },
};
struct drm_gem_object *bo;
struct drm_framebuffer *fb;
int size;
/* allocate backing bo */
size = mode_cmd.pitches[0] * mode_cmd.height;
DBG("allocating %d bytes for fb %d", size, dev->primary->index);
bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN);
if (IS_ERR(bo)) {
dev_warn(dev->dev, "could not allocate stolen bo\n");
/* try regular bo: */
bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC);
}
if (IS_ERR(bo)) {
DRM_DEV_ERROR(dev->dev, "failed to allocate buffer object\n");
return ERR_CAST(bo);
}
msm_gem_object_set_name(bo, "stolenfb");
fb = msm_framebuffer_init(dev, &mode_cmd, &bo);
if (IS_ERR(fb)) {
DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n");
/* note: if fb creation failed, we can't rely on fb destroy
* to unref the bo:
*/
drm_gem_object_put(bo);
return ERR_CAST(fb);
}
return fb;
}
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