// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
* Author: Rob Clark <[email protected]>
*/
#include <linux/dma-mapping.h>
#include <linux/seq_file.h>
#include <drm/drm_blend.h>
#include <drm/drm_modeset_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include "omap_dmm_tiler.h"
#include "omap_drv.h"
/*
* framebuffer funcs
*/
static const u32 formats[] = {
/* 16bpp [A]RGB: */
DRM_FORMAT_RGB565, /* RGB16-565 */
DRM_FORMAT_RGBX4444, /* RGB12x-4444 */
DRM_FORMAT_XRGB4444, /* xRGB12-4444 */
DRM_FORMAT_RGBA4444, /* RGBA12-4444 */
DRM_FORMAT_ARGB4444, /* ARGB16-4444 */
DRM_FORMAT_XRGB1555, /* xRGB15-1555 */
DRM_FORMAT_ARGB1555, /* ARGB16-1555 */
/* 24bpp RGB: */
DRM_FORMAT_RGB888, /* RGB24-888 */
/* 32bpp [A]RGB: */
DRM_FORMAT_RGBX8888, /* RGBx24-8888 */
DRM_FORMAT_XRGB8888, /* xRGB24-8888 */
DRM_FORMAT_RGBA8888, /* RGBA32-8888 */
DRM_FORMAT_ARGB8888, /* ARGB32-8888 */
/* YUV: */
DRM_FORMAT_NV12,
DRM_FORMAT_YUYV,
DRM_FORMAT_UYVY,
};
/* per-plane info for the fb: */
struct plane {
dma_addr_t dma_addr;
};
#define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
struct omap_framebuffer {
struct drm_framebuffer base;
int pin_count;
const struct drm_format_info *format;
struct plane planes[2];
/* lock for pinning (pin_count and planes.dma_addr) */
struct mutex lock;
};
static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
struct drm_file *file_priv,
unsigned flags, unsigned color,
struct drm_clip_rect *clips,
unsigned num_clips)
{
struct drm_crtc *crtc;
drm_modeset_lock_all(fb->dev);
drm_for_each_crtc(crtc, fb->dev)
omap_crtc_flush(crtc);
drm_modeset_unlock_all(fb->dev);
return 0;
}
static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
.create_handle = drm_gem_fb_create_handle,
.dirty = omap_framebuffer_dirty,
.destroy = drm_gem_fb_destroy,
};
static u32 get_linear_addr(struct drm_framebuffer *fb,
const struct drm_format_info *format, int n, int x, int y)
{
struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
struct plane *plane = &omap_fb->planes[n];
u32 offset;
offset = fb->offsets[n]
+ (x * format->cpp[n] / (n == 0 ? 1 : format->hsub))
+ (y * fb->pitches[n] / (n == 0 ? 1 : format->vsub));
return plane->dma_addr + offset;
}
bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
{
return omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK;
}
/* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */
static u32 drm_rotation_to_tiler(unsigned int drm_rot)
{
u32 orient;
switch (drm_rot & DRM_MODE_ROTATE_MASK) {
default:
case DRM_MODE_ROTATE_0:
orient = 0;
break;
case DRM_MODE_ROTATE_90:
orient = MASK_XY_FLIP | MASK_X_INVERT;
break;
case DRM_MODE_ROTATE_180:
orient = MASK_X_INVERT | MASK_Y_INVERT;
break;
case DRM_MODE_ROTATE_270:
orient = MASK_XY_FLIP | MASK_Y_INVERT;
break;
}
if (drm_rot & DRM_MODE_REFLECT_X)
orient ^= MASK_X_INVERT;
if (drm_rot & DRM_MODE_REFLECT_Y)
orient ^= MASK_Y_INVERT;
return orient;
}
/* update ovl info for scanout, handles cases of multi-planar fb's, etc.
*/
void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
struct drm_plane_state *state,
struct omap_overlay_info *info,
struct omap_overlay_info *r_info)
{
struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
const struct drm_format_info *format = omap_fb->format;
u32 x, y, orient = 0;
info->fourcc = fb->format->format;
info->pos_x = state->crtc_x;
info->pos_y = state->crtc_y;
info->out_width = state->crtc_w;
info->out_height = state->crtc_h;
info->width = state->src_w >> 16;
info->height = state->src_h >> 16;
/* DSS driver wants the w & h in rotated orientation */
if (drm_rotation_90_or_270(state->rotation))
swap(info->width, info->height);
x = state->src_x >> 16;
y = state->src_y >> 16;
if (omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK) {
u32 w = state->src_w >> 16;
u32 h = state->src_h >> 16;
orient = drm_rotation_to_tiler(state->rotation);
/*
* omap_gem_rotated_paddr() wants the x & y in tiler units.
* Usually tiler unit size is the same as the pixel size, except
* for YUV422 formats, for which the tiler unit size is 32 bits
* and pixel size is 16 bits.
*/
if (fb->format->format == DRM_FORMAT_UYVY ||
fb->format->format == DRM_FORMAT_YUYV) {
x /= 2;
w /= 2;
}
/* adjust x,y offset for invert: */
if (orient & MASK_Y_INVERT)
y += h - 1;
if (orient & MASK_X_INVERT)
x += w - 1;
/* Note: x and y are in TILER units, not pixels */
omap_gem_rotated_dma_addr(fb->obj[0], orient, x, y,
&info->paddr);
info->rotation_type = OMAP_DSS_ROT_TILER;
info->rotation = state->rotation ?: DRM_MODE_ROTATE_0;
/* Note: stride in TILER units, not pixels */
info->screen_width = omap_gem_tiled_stride(fb->obj[0], orient);
} else {
switch (state->rotation & DRM_MODE_ROTATE_MASK) {
case 0:
case DRM_MODE_ROTATE_0:
/* OK */
break;
default:
dev_warn(fb->dev->dev,
"rotation '%d' ignored for non-tiled fb\n",
state->rotation);
break;
}
info->paddr = get_linear_addr(fb, format, 0, x, y);
info->rotation_type = OMAP_DSS_ROT_NONE;
info->rotation = DRM_MODE_ROTATE_0;
info->screen_width = fb->pitches[0];
}
/* convert to pixels: */
info->screen_width /= format->cpp[0];
if (fb->format->format == DRM_FORMAT_NV12) {
if (info->rotation_type == OMAP_DSS_ROT_TILER) {
WARN_ON(!(omap_gem_flags(fb->obj[1]) & OMAP_BO_TILED_MASK));
omap_gem_rotated_dma_addr(fb->obj[1], orient, x/2, y/2,
&info->p_uv_addr);
} else {
info->p_uv_addr = get_linear_addr(fb, format, 1, x, y);
}
} else {
info->p_uv_addr = 0;
}
if (r_info) {
info->width /= 2;
info->out_width /= 2;
*r_info = *info;
if (fb->format->is_yuv) {
if (info->width & 1) {
info->width++;
r_info->width--;
}
if (info->out_width & 1) {
info->out_width++;
r_info->out_width--;
}
}
r_info->pos_x = info->pos_x + info->out_width;
r_info->paddr = get_linear_addr(fb, format, 0,
x + info->width, y);
if (fb->format->format == DRM_FORMAT_NV12) {
r_info->p_uv_addr =
get_linear_addr(fb, format, 1,
x + info->width, y);
}
}
}
/* pin, prepare for scanout: */
int omap_framebuffer_pin(struct drm_framebuffer *fb)
{
struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
int ret, i, n = fb->format->num_planes;
mutex_lock(&omap_fb->lock);
if (omap_fb->pin_count > 0) {
omap_fb->pin_count++;
mutex_unlock(&omap_fb->lock);
return 0;
}
for (i = 0; i < n; i++) {
struct plane *plane = &omap_fb->planes[i];
ret = omap_gem_pin(fb->obj[i], &plane->dma_addr);
if (ret)
goto fail;
omap_gem_dma_sync_buffer(fb->obj[i], DMA_TO_DEVICE);
}
omap_fb->pin_count++;
mutex_unlock(&omap_fb->lock);
return 0;
fail:
for (i--; i >= 0; i--) {
struct plane *plane = &omap_fb->planes[i];
omap_gem_unpin(fb->obj[i]);
plane->dma_addr = 0;
}
mutex_unlock(&omap_fb->lock);
return ret;
}
/* unpin, no longer being scanned out: */
void omap_framebuffer_unpin(struct drm_framebuffer *fb)
{
struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
int i, n = fb->format->num_planes;
mutex_lock(&omap_fb->lock);
omap_fb->pin_count--;
if (omap_fb->pin_count > 0) {
mutex_unlock(&omap_fb->lock);
return;
}
for (i = 0; i < n; i++) {
struct plane *plane = &omap_fb->planes[i];
omap_gem_unpin(fb->obj[i]);
plane->dma_addr = 0;
}
mutex_unlock(&omap_fb->lock);
}
#ifdef CONFIG_DEBUG_FS
void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
{
int i, n = fb->format->num_planes;
seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
(char *)&fb->format->format);
for (i = 0; i < n; i++) {
seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
i, fb->offsets[n], fb->pitches[i]);
omap_gem_describe(fb->obj[i], m);
}
}
#endif
struct drm_framebuffer *omap_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);
unsigned int num_planes = info->num_planes;
struct drm_gem_object *bos[4];
struct drm_framebuffer *fb;
int i;
for (i = 0; i < num_planes; i++) {
bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
if (!bos[i]) {
fb = ERR_PTR(-ENOENT);
goto error;
}
}
fb = omap_framebuffer_init(dev, mode_cmd, bos);
if (IS_ERR(fb))
goto error;
return fb;
error:
while (--i >= 0)
drm_gem_object_put(bos[i]);
return fb;
}
struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
{
const struct drm_format_info *format = NULL;
struct omap_framebuffer *omap_fb = NULL;
struct drm_framebuffer *fb = NULL;
unsigned int pitch = mode_cmd->pitches[0];
int ret, i;
DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
dev, mode_cmd, mode_cmd->width, mode_cmd->height,
(char *)&mode_cmd->pixel_format);
format = drm_get_format_info(dev, mode_cmd);
for (i = 0; i < ARRAY_SIZE(formats); i++) {
if (formats[i] == mode_cmd->pixel_format)
break;
}
if (!format || i == ARRAY_SIZE(formats)) {
dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n",
(char *)&mode_cmd->pixel_format);
ret = -EINVAL;
goto fail;
}
omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
if (!omap_fb) {
ret = -ENOMEM;
goto fail;
}
fb = &omap_fb->base;
omap_fb->format = format;
mutex_init(&omap_fb->lock);
/*
* The code below assumes that no format use more than two planes, and
* that the two planes of multiplane formats need the same number of
* bytes per pixel.
*/
if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");
ret = -EINVAL;
goto fail;
}
if (pitch % format->cpp[0]) {
dev_dbg(dev->dev,
"buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
pitch, format->cpp[0]);
ret = -EINVAL;
goto fail;
}
for (i = 0; i < format->num_planes; i++) {
struct plane *plane = &omap_fb->planes[i];
unsigned int vsub = i == 0 ? 1 : format->vsub;
unsigned int size;
size = pitch * mode_cmd->height / vsub;
if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {
dev_dbg(dev->dev,
"provided buffer object is too small! %zu < %d\n",
bos[i]->size - mode_cmd->offsets[i], size);
ret = -EINVAL;
goto fail;
}
fb->obj[i] = bos[i];
plane->dma_addr = 0;
}
drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
if (ret) {
dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
goto fail;
}
DBG("create: FB ID: %d (%p)", fb->base.id, fb);
return fb;
fail:
kfree(omap_fb);
return ERR_PTR(ret);
}
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