UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity
OpenCloudOS-Kernel/drivers/gpu/drm/mgag200/mgag200_cursor.c

320 lines
7.6 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2013 Matrox Graphics
*
* Author: Christopher Harvey <charvey@matrox.com>
*/
#include <linux/pci.h>
#include "mgag200_drv.h"
static bool warn_transparent = true;
static bool warn_palette = true;
static int mgag200_cursor_update(struct mga_device *mdev, void *dst, void *src,
unsigned int width, unsigned int height)
{
struct drm_device *dev = mdev->dev;
unsigned int i, row, col;
uint32_t colour_set[16];
uint32_t *next_space = &colour_set[0];
uint32_t *palette_iter;
uint32_t this_colour;
bool found = false;
int colour_count = 0;
u8 reg_index;
u8 this_row[48];
memset(&colour_set[0], 0, sizeof(uint32_t)*16);
/* width*height*4 = 16384 */
for (i = 0; i < 16384; i += 4) {
this_colour = ioread32(src + i);
/* No transparency */
if (this_colour>>24 != 0xff &&
this_colour>>24 != 0x0) {
if (warn_transparent) {
dev_info(&dev->pdev->dev, "Video card doesn't support cursors with partial transparency.\n");
dev_info(&dev->pdev->dev, "Not enabling hardware cursor.\n");
warn_transparent = false; /* Only tell the user once. */
}
return -EINVAL;
}
/* Don't need to store transparent pixels as colours */
if (this_colour>>24 == 0x0)
continue;
found = false;
for (palette_iter = &colour_set[0]; palette_iter != next_space; palette_iter++) {
if (*palette_iter == this_colour) {
found = true;
break;
}
}
if (found)
continue;
/* We only support 4bit paletted cursors */
if (colour_count >= 16) {
if (warn_palette) {
dev_info(&dev->pdev->dev, "Video card only supports cursors with up to 16 colours.\n");
dev_info(&dev->pdev->dev, "Not enabling hardware cursor.\n");
warn_palette = false; /* Only tell the user once. */
}
return -EINVAL;
}
*next_space = this_colour;
next_space++;
colour_count++;
}
/* Program colours from cursor icon into palette */
for (i = 0; i < colour_count; i++) {
if (i <= 2)
reg_index = 0x8 + i*0x4;
else
reg_index = 0x60 + i*0x3;
WREG_DAC(reg_index, colour_set[i] & 0xff);
WREG_DAC(reg_index+1, colour_set[i]>>8 & 0xff);
WREG_DAC(reg_index+2, colour_set[i]>>16 & 0xff);
BUG_ON((colour_set[i]>>24 & 0xff) != 0xff);
}
/* now write colour indices into hardware cursor buffer */
for (row = 0; row < 64; row++) {
memset(&this_row[0], 0, 48);
for (col = 0; col < 64; col++) {
this_colour = ioread32(src + 4*(col + 64*row));
/* write transparent pixels */
if (this_colour>>24 == 0x0) {
this_row[47 - col/8] |= 0x80>>(col%8);
continue;
}
/* write colour index here */
for (i = 0; i < colour_count; i++) {
if (colour_set[i] == this_colour) {
if (col % 2)
this_row[col/2] |= i<<4;
else
this_row[col/2] |= i;
break;
}
}
}
memcpy_toio(dst + row*48, &this_row[0], 48);
}
return 0;
}
static void mgag200_cursor_set_base(struct mga_device *mdev, u64 address)
{
u8 addrl = (address >> 10) & 0xff;
u8 addrh = (address >> 18) & 0x3f;
/* Program gpu address of cursor buffer */
WREG_DAC(MGA1064_CURSOR_BASE_ADR_LOW, addrl);
WREG_DAC(MGA1064_CURSOR_BASE_ADR_HI, addrh);
}
static int mgag200_show_cursor(struct mga_device *mdev, void *src,
unsigned int width, unsigned int height)
{
struct drm_device *dev = mdev->dev;
struct drm_gem_vram_object *gbo;
void *dst;
s64 off;
int ret;
gbo = mdev->cursor.gbo[mdev->cursor.next_index];
if (!gbo) {
WREG8(MGA_CURPOSXL, 0);
WREG8(MGA_CURPOSXH, 0);
return -ENOTSUPP; /* Didn't allocate space for cursors */
}
dst = drm_gem_vram_vmap(gbo);
if (IS_ERR(dst)) {
ret = PTR_ERR(dst);
dev_err(&dev->pdev->dev,
"failed to map cursor updates: %d\n", ret);
return ret;
}
off = drm_gem_vram_offset(gbo);
if (off < 0) {
ret = (int)off;
dev_err(&dev->pdev->dev,
"failed to get cursor scanout address: %d\n", ret);
goto err_drm_gem_vram_vunmap;
}
ret = mgag200_cursor_update(mdev, dst, src, width, height);
if (ret)
goto err_drm_gem_vram_vunmap;
mgag200_cursor_set_base(mdev, off);
/* Adjust cursor control register to turn on the cursor */
WREG_DAC(MGA1064_CURSOR_CTL, 4); /* 16-colour palletized cursor mode */
drm_gem_vram_vunmap(gbo, dst);
++mdev->cursor.next_index;
mdev->cursor.next_index %= ARRAY_SIZE(mdev->cursor.gbo);
return 0;
err_drm_gem_vram_vunmap:
drm_gem_vram_vunmap(gbo, dst);
return ret;
}
/*
* Hide the cursor off screen. We can't disable the cursor hardware because
* it takes too long to re-activate and causes momentary corruption.
*/
static void mgag200_hide_cursor(struct mga_device *mdev)
{
WREG8(MGA_CURPOSXL, 0);
WREG8(MGA_CURPOSXH, 0);
}
static void mgag200_move_cursor(struct mga_device *mdev, int x, int y)
{
if (WARN_ON(x <= 0))
return;
if (WARN_ON(y <= 0))
return;
if (WARN_ON(x & ~0xffff))
return;
if (WARN_ON(y & ~0xffff))
return;
WREG8(MGA_CURPOSXL, x & 0xff);
WREG8(MGA_CURPOSXH, (x>>8) & 0xff);
WREG8(MGA_CURPOSYL, y & 0xff);
WREG8(MGA_CURPOSYH, (y>>8) & 0xff);
}
int mgag200_cursor_init(struct mga_device *mdev)
{
struct drm_device *dev = mdev->dev;
size_t ncursors = ARRAY_SIZE(mdev->cursor.gbo);
size_t size;
int ret;
size_t i;
struct drm_gem_vram_object *gbo;
size = roundup(64 * 48, PAGE_SIZE);
if (size * ncursors > mdev->vram_fb_available)
return -ENOMEM;
for (i = 0; i < ncursors; ++i) {
gbo = drm_gem_vram_create(dev, size, 0);
if (IS_ERR(gbo)) {
ret = PTR_ERR(gbo);
goto err_drm_gem_vram_put;
}
ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM |
DRM_GEM_VRAM_PL_FLAG_TOPDOWN);
if (ret) {
drm_gem_vram_put(gbo);
goto err_drm_gem_vram_put;
}
mdev->cursor.gbo[i] = gbo;
}
/*
* At the high end of video memory, we reserve space for
* buffer objects. The cursor plane uses this memory to store
* a double-buffered image of the current cursor. Hence, it's
* not available for framebuffers.
*/
mdev->vram_fb_available -= ncursors * size;
return 0;
err_drm_gem_vram_put:
while (i) {
--i;
gbo = mdev->cursor.gbo[i];
drm_gem_vram_unpin(gbo);
drm_gem_vram_put(gbo);
mdev->cursor.gbo[i] = NULL;
}
return ret;
}
void mgag200_cursor_fini(struct mga_device *mdev)
{
size_t i;
struct drm_gem_vram_object *gbo;
for (i = 0; i < ARRAY_SIZE(mdev->cursor.gbo); ++i) {
gbo = mdev->cursor.gbo[i];
drm_gem_vram_unpin(gbo);
drm_gem_vram_put(gbo);
}
}
int mgag200_crtc_cursor_set(struct drm_crtc *crtc, struct drm_file *file_priv,
uint32_t handle, uint32_t width, uint32_t height)
{
struct drm_device *dev = crtc->dev;
struct mga_device *mdev = (struct mga_device *)dev->dev_private;
struct drm_gem_object *obj;
struct drm_gem_vram_object *gbo = NULL;
int ret;
u8 *src;
if (!handle || !file_priv) {
mgag200_hide_cursor(mdev);
return 0;
}
if (width != 64 || height != 64) {
WREG8(MGA_CURPOSXL, 0);
WREG8(MGA_CURPOSXH, 0);
return -EINVAL;
}
obj = drm_gem_object_lookup(file_priv, handle);
if (!obj)
return -ENOENT;
gbo = drm_gem_vram_of_gem(obj);
src = drm_gem_vram_vmap(gbo);
if (IS_ERR(src)) {
ret = PTR_ERR(src);
dev_err(&dev->pdev->dev,
"failed to map user buffer updates\n");
goto err_drm_gem_object_put_unlocked;
}
ret = mgag200_show_cursor(mdev, src, width, height);
if (ret)
goto err_drm_gem_vram_vunmap;
/* Now update internal buffer pointers */
drm_gem_vram_vunmap(gbo, src);
drm_gem_object_put_unlocked(obj);
return 0;
err_drm_gem_vram_vunmap:
drm_gem_vram_vunmap(gbo, src);
err_drm_gem_object_put_unlocked:
drm_gem_object_put_unlocked(obj);
return ret;
}
int mgag200_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
{
struct mga_device *mdev = (struct mga_device *)crtc->dev->dev_private;
/* Our origin is at (64,64) */
x += 64;
y += 64;
mgag200_move_cursor(mdev, x, y);
return 0;
}
Reference in New Issue View Git Blame Copy Permalink