diff options
Diffstat (limited to 'linux-core/drm_fb.c')
| -rw-r--r-- | linux-core/drm_fb.c | 432 |
1 files changed, 432 insertions, 0 deletions
diff --git a/linux-core/drm_fb.c b/linux-core/drm_fb.c new file mode 100644 index 00000000..74a4394a --- /dev/null +++ b/linux-core/drm_fb.c @@ -0,0 +1,432 @@ +/* + * Copyright © 2007 David Airlie + * + * 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, 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 NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS 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. + * + * Authors: + * David Airlie + */ + /* + * Modularization + */ + +#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_crtc.h" + +struct drmfb_par { + struct drm_device *dev; + struct drm_crtc *crtc; +}; + +static int drmfb_setcolreg(unsigned regno, unsigned red, unsigned green, + unsigned blue, unsigned transp, + struct fb_info *info) +{ + struct drmfb_par *par = info->par; + struct drm_framebuffer *fb = par->crtc->fb; + struct drm_crtc *crtc = par->crtc; + + if (regno > 255) + return 1; + + if (fb->depth == 8) { + return 0; + } + + 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 drmfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) +{ + struct drmfb_par *par = info->par; + struct drm_device *dev = par->dev; + struct drm_framebuffer *fb = par->crtc->fb; + struct drm_display_mode *drm_mode; + struct drm_output *output; + int depth; + + 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: + depth = (var->green.length == 6) ? 16 : 15; + break; + case 32: + depth = (var->transp.length > 0) ? 32 : 24; + break; + default: + depth = var->bits_per_pixel; + break; + } + + switch (depth) { + case 8: + var->red.offset = 0; + var->green.offset = 0; + 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; + case 15: + 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 = 1; + var->transp.offset = 15; + break; + case 16: + 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 24: + 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; + case 32: + 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; + break; + default: + return -EINVAL; + } + +#if 0 + /* Here we walk the output mode list and look for modes. If we haven't + * got it, then bail. Not very nice, so this is disabled. + * In the set_par code, we create our mode based on the incoming + * parameters. Nicer, but may not be desired by some. + */ + list_for_each_entry(output, &dev->mode_config.output_list, head) { + if (output->crtc == par->crtc) + break; + } + + list_for_each_entry(drm_mode, &output->modes, head) { + if (drm_mode->hdisplay == var->xres && + drm_mode->vdisplay == var->yres && + drm_mode->clock != 0) + break; + } + + if (!drm_mode) + return -EINVAL; +#endif + + return 0; +} + +/* this will let fbcon do the mode init */ +static int drmfb_set_par(struct fb_info *info) +{ + struct drmfb_par *par = info->par; + struct drm_framebuffer *fb = par->crtc->fb; + struct drm_device *dev = par->dev; + struct drm_display_mode *drm_mode; + struct fb_var_screeninfo *var = &info->var; + struct drm_output *output; + + 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: + fb->depth = var->bits_per_pixel; + break; + } + + 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->depth == 8) ? FB_VISUAL_PSEUDOCOLOR : 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. + */ +#if 0 + list_for_each_entry(output, &dev->mode_config.output_list, head) { + if (output->crtc == par->crtc) + break; + } + + list_for_each_entry(drm_mode, &output->modes, head) { + if (drm_mode->hdisplay == var->xres && + drm_mode->vdisplay == var->yres && + drm_mode->clock != 0) + break; + } +#else + 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); +#endif + + if (!drm_crtc_set_mode(par->crtc, drm_mode, 0, 0)) + return -EINVAL; + + /* Have to destroy our created mode if we're not searching the mode + * list for it. + */ +#if 1 + drm_mode_destroy(dev, drm_mode); +#endif + + return 0; +} + +static struct fb_ops drmfb_ops = { + .owner = THIS_MODULE, + // .fb_open = drmfb_open, + // .fb_read = drmfb_read, + // .fb_write = drmfb_write, + // .fb_release = drmfb_release, + // .fb_ioctl = drmfb_ioctl, + .fb_check_var = drmfb_check_var, + .fb_set_par = drmfb_set_par, + .fb_setcolreg = drmfb_setcolreg, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, +}; + +int drmfb_probe(struct drm_device *dev, struct drm_crtc *crtc) +{ + struct fb_info *info; + struct drm_framebuffer *fb = crtc->fb; + struct drmfb_par *par; + struct device *device = &dev->pdev->dev; + struct drm_display_mode *mode = crtc->desired_mode; + int ret; + + info = framebuffer_alloc(sizeof(struct drmfb_par), device); + if (!info) + return -ENOMEM; + + fb->fbdev = info; + + par = info->par; + + par->dev = dev; + par->crtc = crtc; + + info->fbops = &drmfb_ops; + + strcpy(info->fix.id, "drmfb"); + info->fix.type = FB_TYPE_PACKED_PIXELS; + info->fix.visual = FB_VISUAL_TRUECOLOR; + info->fix.accel = FB_ACCEL_NONE; + 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->offset + dev->mode_config.fb_base; + info->fix.smem_len = info->fix.line_length * fb->height; + + info->flags = FBINFO_DEFAULT; + + ret = drm_mem_reg_ioremap(dev, &fb->bo->mem, &fb->virtual_base); + if (ret) + DRM_ERROR("error mapping fb: %d\n", ret); + + info->screen_base = fb->virtual_base; + info->screen_size = info->fix.smem_len; /* ??? */ + 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; + + DRM_DEBUG("fb depth is %d\n", fb->depth); + switch(fb->depth) { + case 8: + info->var.red.offset = 0; + info->var.green.offset = 0; + info->var.blue.offset = 0; + info->var.red.length = 8; /* 8bit DAC */ + info->var.green.length = 8; + info->var.blue.length = 8; + info->var.transp.offset = 0; + info->var.transp.length = 0; + break; + 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; + info->var.transp.length = 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: + break; + } + + if (register_framebuffer(info) < 0) { + unregister_framebuffer(info); + return -EINVAL; + } + + printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, + info->fix.id); + return 0; +} +EXPORT_SYMBOL(drmfb_probe); + +int drmfb_remove(struct drm_device *dev, struct drm_crtc *crtc) +{ + struct fb_info *info = fb->fbdev; + struct drm_framebuffer *fb = crtc->fb; + + if (info) { + drm_mem_reg_iounmap(dev, &fb->bo->mem, fb->virtual_base); + unregister_framebuffer(info); + framebuffer_release(info); + } + return 0; +} +EXPORT_SYMBOL(drmfb_remove); +MODULE_LICENSE("GPL"); |