blob: 742d43a7edf433f6d6631f44bd72a3146c44aa06 [file] [log] [blame]
/*
* Copyright 2012 Red Hat Inc.
* Parts based on xf86-video-ast
* Copyright (c) 2005 ASPEED Technology Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*/
/*
* Authors: Dave Airlie <airlied@redhat.com>
*/
#include <drm/drm_gem_vram_helper.h>
#include <drm/drm_managed.h>
#include "ast_drv.h"
static void ast_cursor_fini(struct ast_private *ast)
{
size_t i;
struct drm_gem_vram_object *gbo;
for (i = 0; i < ARRAY_SIZE(ast->cursor.gbo); ++i) {
gbo = ast->cursor.gbo[i];
drm_gem_vram_vunmap(gbo, &ast->cursor.map[i]);
drm_gem_vram_unpin(gbo);
drm_gem_vram_put(gbo);
}
}
static void ast_cursor_release(struct drm_device *dev, void *ptr)
{
struct ast_private *ast = to_ast_private(dev);
ast_cursor_fini(ast);
}
/*
* Allocate cursor BOs and pins them at the end of VRAM.
*/
int ast_cursor_init(struct ast_private *ast)
{
struct drm_device *dev = &ast->base;
size_t size, i;
struct drm_gem_vram_object *gbo;
struct dma_buf_map map;
int ret;
size = roundup(AST_HWC_SIZE + AST_HWC_SIGNATURE_SIZE, PAGE_SIZE);
for (i = 0; i < ARRAY_SIZE(ast->cursor.gbo); ++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;
}
ret = drm_gem_vram_vmap(gbo, &map);
if (ret) {
drm_gem_vram_unpin(gbo);
drm_gem_vram_put(gbo);
goto err_drm_gem_vram_put;
}
ast->cursor.gbo[i] = gbo;
ast->cursor.map[i] = map;
}
return drmm_add_action_or_reset(dev, ast_cursor_release, NULL);
err_drm_gem_vram_put:
while (i) {
--i;
gbo = ast->cursor.gbo[i];
drm_gem_vram_vunmap(gbo, &ast->cursor.map[i]);
drm_gem_vram_unpin(gbo);
drm_gem_vram_put(gbo);
}
return ret;
}
static void update_cursor_image(u8 __iomem *dst, const u8 *src, int width, int height)
{
union {
u32 ul;
u8 b[4];
} srcdata32[2], data32;
union {
u16 us;
u8 b[2];
} data16;
u32 csum = 0;
s32 alpha_dst_delta, last_alpha_dst_delta;
u8 __iomem *dstxor;
const u8 *srcxor;
int i, j;
u32 per_pixel_copy, two_pixel_copy;
alpha_dst_delta = AST_MAX_HWC_WIDTH << 1;
last_alpha_dst_delta = alpha_dst_delta - (width << 1);
srcxor = src;
dstxor = (u8 *)dst + last_alpha_dst_delta + (AST_MAX_HWC_HEIGHT - height) * alpha_dst_delta;
per_pixel_copy = width & 1;
two_pixel_copy = width >> 1;
for (j = 0; j < height; j++) {
for (i = 0; i < two_pixel_copy; i++) {
srcdata32[0].ul = *((u32 *)srcxor) & 0xf0f0f0f0;
srcdata32[1].ul = *((u32 *)(srcxor + 4)) & 0xf0f0f0f0;
data32.b[0] = srcdata32[0].b[1] | (srcdata32[0].b[0] >> 4);
data32.b[1] = srcdata32[0].b[3] | (srcdata32[0].b[2] >> 4);
data32.b[2] = srcdata32[1].b[1] | (srcdata32[1].b[0] >> 4);
data32.b[3] = srcdata32[1].b[3] | (srcdata32[1].b[2] >> 4);
writel(data32.ul, dstxor);
csum += data32.ul;
dstxor += 4;
srcxor += 8;
}
for (i = 0; i < per_pixel_copy; i++) {
srcdata32[0].ul = *((u32 *)srcxor) & 0xf0f0f0f0;
data16.b[0] = srcdata32[0].b[1] | (srcdata32[0].b[0] >> 4);
data16.b[1] = srcdata32[0].b[3] | (srcdata32[0].b[2] >> 4);
writew(data16.us, dstxor);
csum += (u32)data16.us;
dstxor += 2;
srcxor += 4;
}
dstxor += last_alpha_dst_delta;
}
/* write checksum + signature */
dst += AST_HWC_SIZE;
writel(csum, dst);
writel(width, dst + AST_HWC_SIGNATURE_SizeX);
writel(height, dst + AST_HWC_SIGNATURE_SizeY);
writel(0, dst + AST_HWC_SIGNATURE_HOTSPOTX);
writel(0, dst + AST_HWC_SIGNATURE_HOTSPOTY);
}
int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb)
{
struct drm_device *dev = &ast->base;
struct drm_gem_vram_object *gbo;
struct dma_buf_map map;
int ret;
void *src;
void __iomem *dst;
if (drm_WARN_ON_ONCE(dev, fb->width > AST_MAX_HWC_WIDTH) ||
drm_WARN_ON_ONCE(dev, fb->height > AST_MAX_HWC_HEIGHT))
return -EINVAL;
gbo = drm_gem_vram_of_gem(fb->obj[0]);
ret = drm_gem_vram_pin(gbo, 0);
if (ret)
return ret;
ret = drm_gem_vram_vmap(gbo, &map);
if (ret)
goto err_drm_gem_vram_unpin;
src = map.vaddr; /* TODO: Use mapping abstraction properly */
dst = ast->cursor.map[ast->cursor.next_index].vaddr_iomem;
/* do data transfer to cursor BO */
update_cursor_image(dst, src, fb->width, fb->height);
drm_gem_vram_vunmap(gbo, &map);
drm_gem_vram_unpin(gbo);
return 0;
err_drm_gem_vram_unpin:
drm_gem_vram_unpin(gbo);
return ret;
}
static void ast_cursor_set_base(struct ast_private *ast, u64 address)
{
u8 addr0 = (address >> 3) & 0xff;
u8 addr1 = (address >> 11) & 0xff;
u8 addr2 = (address >> 19) & 0xff;
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc8, addr0);
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc9, addr1);
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xca, addr2);
}
void ast_cursor_page_flip(struct ast_private *ast)
{
struct drm_device *dev = &ast->base;
struct drm_gem_vram_object *gbo;
s64 off;
gbo = ast->cursor.gbo[ast->cursor.next_index];
off = drm_gem_vram_offset(gbo);
if (drm_WARN_ON_ONCE(dev, off < 0))
return; /* Bug: we didn't pin the cursor HW BO to VRAM. */
ast_cursor_set_base(ast, off);
++ast->cursor.next_index;
ast->cursor.next_index %= ARRAY_SIZE(ast->cursor.gbo);
}
static void ast_cursor_set_location(struct ast_private *ast, u16 x, u16 y,
u8 x_offset, u8 y_offset)
{
u8 x0 = (x & 0x00ff);
u8 x1 = (x & 0x0f00) >> 8;
u8 y0 = (y & 0x00ff);
u8 y1 = (y & 0x0700) >> 8;
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc2, x_offset);
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc3, y_offset);
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc4, x0);
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc5, x1);
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc6, y0);
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc7, y1);
}
void ast_cursor_show(struct ast_private *ast, int x, int y,
unsigned int offset_x, unsigned int offset_y)
{
u8 x_offset, y_offset;
u8 __iomem *dst;
u8 __iomem *sig;
u8 jreg;
dst = ast->cursor.map[ast->cursor.next_index].vaddr;
sig = dst + AST_HWC_SIZE;
writel(x, sig + AST_HWC_SIGNATURE_X);
writel(y, sig + AST_HWC_SIGNATURE_Y);
if (x < 0) {
x_offset = (-x) + offset_x;
x = 0;
} else {
x_offset = offset_x;
}
if (y < 0) {
y_offset = (-y) + offset_y;
y = 0;
} else {
y_offset = offset_y;
}
ast_cursor_set_location(ast, x, y, x_offset, y_offset);
/* dummy write to fire HWC */
jreg = 0x02 |
0x01; /* enable ARGB4444 cursor */
ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xcb, 0xfc, jreg);
}
void ast_cursor_hide(struct ast_private *ast)
{
ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xcb, 0xfc, 0x00);
}