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drm/linux-core/radeon_ms_fb.c

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/*
* Copyright © 2007 David Airlie
* Copyright © 2007 Jerome Glisse
*
* All Rights Reserved.
*
* 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 on the rights to use, copy, modify, merge,
* publish, distribute, sublicense, 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 above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* 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 ATI, VA LINUX SYSTEMS AND/OR
* THEIR 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.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include "drmP.h"
#include "drm.h"
#include "drm_crtc.h"
#include "radeon_ms.h"
#include "amd.h"
static int radeonfb_setcolreg(unsigned regno, unsigned red,
unsigned green, unsigned blue,
unsigned transp, struct fb_info *info)
{
struct amd_fb *par = info->par;
struct drm_framebuffer *fb = par->fb;
struct drm_crtc *crtc = par->crtc;
if (regno > 255) {
return 1;
}
if (crtc->funcs->gamma_set) {
crtc->funcs->gamma_set(crtc, red, green, blue, regno);
}
if (regno < 16) {
switch (fb->depth) {
case 15:
fb->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
((green & 0xf800) >> 6) |
((blue & 0xf800) >> 11);
break;
case 16:
fb->pseudo_palette[regno] = (red & 0xf800) |
((green & 0xfc00) >> 5) |
((blue & 0xf800) >> 11);
break;
case 24:
case 32:
fb->pseudo_palette[regno] = ((red & 0xff00) << 8) |
(green & 0xff00) |
((blue & 0xff00) >> 8);
break;
}
}
return 0;
}
static int radeonfb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct amd_fb *par = info->par;
struct drm_framebuffer *fb = par->fb;
if (!var->pixclock)
return -EINVAL;
/* Need to resize the fb object !!! */
if (var->xres > fb->width || var->yres > fb->height) {
DRM_ERROR("Requested width/height is greater than "
"current fb object %dx%d > %dx%d\n",
var->xres, var->yres, fb->width, fb->height);
DRM_ERROR("Need resizing code.\n");
return -EINVAL;
}
switch (var->bits_per_pixel) {
case 16:
if (var->green.length == 5) {
var->red.offset = 10;
var->green.offset = 5;
var->blue.offset = 0;
var->red.length = 5;
var->green.length = 5;
var->blue.length = 5;
var->transp.length = 0;
var->transp.offset = 0;
} else {
var->red.offset = 11;
var->green.offset = 6;
var->blue.offset = 0;
var->red.length = 5;
var->green.length = 6;
var->blue.length = 5;
var->transp.length = 0;
var->transp.offset = 0;
}
break;
case 32:
if (var->transp.length) {
var->red.offset = 16;
var->green.offset = 8;
var->blue.offset = 0;
var->red.length = 8;
var->green.length = 8;
var->blue.length = 8;
var->transp.length = 8;
var->transp.offset = 24;
} else {
var->red.offset = 16;
var->green.offset = 8;
var->blue.offset = 0;
var->red.length = 8;
var->green.length = 8;
var->blue.length = 8;
var->transp.length = 0;
var->transp.offset = 0;
}
break;
default:
return -EINVAL;
}
return 0;
}
static bool radeonfb_mode_equal(struct drm_display_mode *mode1,
struct drm_display_mode *mode2)
{
if (mode1->hdisplay == mode2->hdisplay &&
mode1->hsync_start == mode2->hsync_start &&
mode1->hsync_end == mode2->hsync_end &&
mode1->htotal == mode2->htotal &&
mode1->hskew == mode2->hskew &&
mode1->vdisplay == mode2->vdisplay &&
mode1->vsync_start == mode2->vsync_start &&
mode1->vsync_end == mode2->vsync_end &&
mode1->vtotal == mode2->vtotal &&
mode1->vscan == mode2->vscan &&
mode1->flags == mode2->flags) {
/* FIXME: what about adding a margin for clock ? */
if (mode1->clock == mode2->clock)
return true;
return false;
}
return false;
}
static int radeonfb_set_par(struct fb_info *info)
{
struct amd_fb *par = info->par;
struct drm_framebuffer *fb = par->fb;
struct drm_device *dev = par->dev;
struct drm_display_mode *drm_mode, *search_mode;
struct drm_output *output;
struct fb_var_screeninfo *var = &info->var;
int found = 0;
switch (var->bits_per_pixel) {
case 16:
fb->depth = (var->green.length == 6) ? 16 : 15;
break;
case 32:
fb->depth = (var->transp.length > 0) ? 32 : 24;
break;
default:
return -EINVAL;
}
fb->bits_per_pixel = var->bits_per_pixel;
info->fix.line_length = fb->pitch;
info->fix.smem_len = info->fix.line_length * fb->height;
info->fix.visual = FB_VISUAL_TRUECOLOR;
info->screen_size = info->fix.smem_len; /* ??? */
/* Should we walk the output's modelist or just create our own ???
* For now, we create and destroy a mode based on the incoming
* parameters. But there's commented out code below which scans
* the output list too.
*/
drm_mode = drm_mode_create(dev);
drm_mode->hdisplay = var->xres;
drm_mode->hsync_start = drm_mode->hdisplay + var->right_margin;
drm_mode->hsync_end = drm_mode->hsync_start + var->hsync_len;
drm_mode->htotal = drm_mode->hsync_end + var->left_margin;
drm_mode->vdisplay = var->yres;
drm_mode->vsync_start = drm_mode->vdisplay + var->lower_margin;
drm_mode->vsync_end = drm_mode->vsync_start + var->vsync_len;
drm_mode->vtotal = drm_mode->vsync_end + var->upper_margin;
drm_mode->clock = PICOS2KHZ(var->pixclock);
drm_mode->vrefresh = drm_mode_vrefresh(drm_mode);
drm_mode_set_name(drm_mode);
drm_mode_set_crtcinfo(drm_mode, CRTC_INTERLACE_HALVE_V);
list_for_each_entry(output, &dev->mode_config.output_list, head) {
if (output->crtc == par->crtc)
break;
}
drm_mode_debug_printmodeline(drm_mode);
list_for_each_entry(search_mode, &output->modes, head) {
drm_mode_debug_printmodeline(search_mode);
if (radeonfb_mode_equal(drm_mode, search_mode)) {
drm_mode_destroy(dev, drm_mode);
drm_mode = search_mode;
found = 1;
break;
}
}
if (!found) {
if (par->fb_mode) {
drm_mode_detachmode_crtc(dev, par->fb_mode);
}
par->fb_mode = drm_mode;
drm_mode_debug_printmodeline(drm_mode);
/* attach mode */
drm_mode_attachmode_crtc(dev, par->crtc, par->fb_mode);
}
if (par->crtc->enabled) {
if (!drm_mode_equal(&par->crtc->mode, drm_mode) ||
par->crtc->fb != par->fb) {
par->crtc->fb = par->fb;
if (!drm_crtc_set_mode(par->crtc, drm_mode, 0, 0)) {
return -EINVAL;
}
}
}
return 0;
}
static struct fb_ops radeonfb_ops = {
.owner = THIS_MODULE,
// .fb_open = radeonfb_open,
// .fb_read = radeonfb_read,
// .fb_write = radeonfb_write,
// .fb_release = radeonfb_release,
// .fb_ioctl = radeonfb_ioctl,
.fb_check_var = radeonfb_check_var,
.fb_set_par = radeonfb_set_par,
.fb_setcolreg = radeonfb_setcolreg,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
int radeonfb_probe(struct drm_device *dev, struct drm_crtc *crtc, struct drm_output *output)
{
struct drm_radeon_private *dev_priv = dev->dev_private;
struct fb_info *info;
struct amd_fb *par;
struct device *device = &dev->pdev->dev;
struct drm_framebuffer *fb;
struct drm_display_mode *mode = crtc->desired_mode;
int ret;
info = framebuffer_alloc(sizeof(struct amd_fb), device);
if (!info){
DRM_INFO("[radeon_ms] framebuffer_alloc failed\n");
return -EINVAL;
}
fb = drm_framebuffer_create(dev);
if (!fb) {
framebuffer_release(info);
DRM_ERROR("[radeon_ms] failed to allocate fb.\n");
return -EINVAL;
}
crtc->fb = fb;
fb->width = crtc->desired_mode->hdisplay;
fb->height = crtc->desired_mode->vdisplay;
fb->bits_per_pixel = 32;
fb->pitch = fb->width * ((fb->bits_per_pixel + 1) / 8);
fb->depth = 24;
/* one page alignment should be fine for constraint (micro|macro tiling,
* bit depth, color buffer offset, ...) */
ret = drm_buffer_object_create(dev, fb->width * fb->height * 4,
drm_bo_type_kernel,
DRM_BO_FLAG_READ |
DRM_BO_FLAG_WRITE |
DRM_BO_FLAG_NO_EVICT |
DRM_BO_FLAG_MEM_VRAM,
DRM_BO_HINT_DONT_FENCE,
1,
0,
&fb->bo);
if (ret || fb->bo == NULL) {
DRM_ERROR("[radeon_ms] failed to allocate framebuffer\n");
drm_framebuffer_destroy(fb);
framebuffer_release(info);
return -EINVAL;
}
DRM_INFO("[radeon_ms] framebuffer %dx%d at 0x%08lX\n",
fb->width, fb->height, fb->bo->offset);
fb->fbdev = info;
par = info->par;
dev_priv->fb = par;
par->dev = dev;
par->crtc = crtc;
par->fb = fb;
info->fbops = &radeonfb_ops;
strcpy(info->fix.id, "radeonfb");
info->fix.type = FB_TYPE_PACKED_PIXELS;
info->fix.visual = FB_VISUAL_TRUECOLOR;
info->fix.type_aux = 0;
info->fix.xpanstep = 8;
info->fix.ypanstep = 1;
info->fix.ywrapstep = 0;
info->fix.accel = FB_ACCEL_ATI_RADEON;
info->fix.type_aux = 0;
info->fix.mmio_start = 0;
info->fix.mmio_len = 0;
info->fix.line_length = fb->pitch;
info->fix.smem_start = fb->bo->offset + dev->mode_config.fb_base;
info->fix.smem_len = info->fix.line_length * fb->height;
info->flags = FBINFO_DEFAULT;
DRM_INFO("[radeon_ms] fb physical start : 0x%lX\n", info->fix.smem_start);
DRM_INFO("[radeon_ms] fb physical size : %d\n", info->fix.smem_len);
ret = drm_bo_kmap(fb->bo, 0, fb->bo->num_pages, &fb->kmap);
if (ret) {
DRM_ERROR("error mapping fb: %d\n", ret);
}
info->screen_base = fb->kmap.virtual;
info->screen_size = info->fix.smem_len; /* FIXME */
info->pseudo_palette = fb->pseudo_palette;
info->var.xres_virtual = fb->width;
info->var.yres_virtual = fb->height;
info->var.bits_per_pixel = fb->bits_per_pixel;
info->var.xoffset = 0;
info->var.yoffset = 0;
info->var.activate = FB_ACTIVATE_NOW;
info->var.height = -1;
info->var.width = -1;
info->var.vmode = FB_VMODE_NONINTERLACED;
info->var.xres = mode->hdisplay;
info->var.right_margin = mode->hsync_start - mode->hdisplay;
info->var.hsync_len = mode->hsync_end - mode->hsync_start;
info->var.left_margin = mode->htotal - mode->hsync_end;
info->var.yres = mode->vdisplay;
info->var.lower_margin = mode->vsync_start - mode->vdisplay;
info->var.vsync_len = mode->vsync_end - mode->vsync_start;
info->var.upper_margin = mode->vtotal - mode->vsync_end;
info->var.pixclock = 10000000 / mode->htotal * 1000 /
mode->vtotal * 100;
/* avoid overflow */
info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
info->pixmap.size = 64*1024;
info->pixmap.buf_align = 8;
info->pixmap.access_align = 32;
info->pixmap.flags = FB_PIXMAP_SYSTEM;
info->pixmap.scan_align = 1;
DRM_DEBUG("fb depth is %d\n", fb->depth);
DRM_DEBUG(" pitch is %d\n", fb->pitch);
switch(fb->depth) {
case 15:
info->var.red.offset = 10;
info->var.green.offset = 5;
info->var.blue.offset = 0;
info->var.red.length = info->var.green.length =
info->var.blue.length = 5;
info->var.transp.offset = 15;
info->var.transp.length = 1;
break;
case 16:
info->var.red.offset = 11;
info->var.green.offset = 5;
info->var.blue.offset = 0;
info->var.red.length = 5;
info->var.green.length = 6;
info->var.blue.length = 5;
info->var.transp.offset = 0;
break;
case 24:
info->var.red.offset = 16;
info->var.green.offset = 8;
info->var.blue.offset = 0;
info->var.red.length = info->var.green.length =
info->var.blue.length = 8;
info->var.transp.offset = 0;
info->var.transp.length = 0;
break;
case 32:
info->var.red.offset = 16;
info->var.green.offset = 8;
info->var.blue.offset = 0;
info->var.red.length = info->var.green.length =
info->var.blue.length = 8;
info->var.transp.offset = 24;
info->var.transp.length = 8;
break;
default:
DRM_ERROR("only support 15, 16, 24 or 32bits per pixel "
"got %d\n", fb->depth);
return -EINVAL;
break;
}
if (register_framebuffer(info) < 0) {
return -EINVAL;
}
DRM_INFO("[radeon_ms] fb%d: %s frame buffer device\n", info->node,
info->fix.id);
return 0;
}
EXPORT_SYMBOL(radeonfb_probe);
int radeonfb_remove(struct drm_device *dev, struct drm_framebuffer *kern_fb)
{
struct drm_radeon_private *dev_priv = dev->dev_private;
struct amd_fb *fb = dev_priv->fb;
struct fb_info *info;
if (fb == NULL || fb->fb == NULL || fb->fb->fbdev == NULL) {
DRM_INFO("[radeon_ms] %s: no crtc, or fb or fbdev\n",
__func__);
return 0;
}
info = fb->fb->fbdev;
unregister_framebuffer(info);
drm_bo_kunmap(&fb->fb->kmap);
drm_bo_usage_deref_unlocked(&fb->fb->bo);
drm_framebuffer_destroy(fb->fb);
framebuffer_release(info);
dev_priv->fb = NULL;
return 0;
}
EXPORT_SYMBOL(radeonfb_remove);
MODULE_LICENSE("GPL");
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