mirror of
https://gitlab.freedesktop.org/mesa/drm.git
synced 2026-01-02 14:40:16 +01:00
f894587221
held across any operations that modify mode lists, crtc config, output config, etc. It should be taken at high level entry points (currently just initial config and user IOCTL). Seems to work ok on my system, but needs more testing (with lockdep) and review from some fresh eyes.
433 lines
11 KiB
C
433 lines
11 KiB
C
/*
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* Copyright © 2007 David Airlie
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* David Airlie
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*/
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/*
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* Modularization
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/tty.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include "drmP.h"
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#include "drm_crtc.h"
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struct drmfb_par {
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struct drm_device *dev;
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struct drm_crtc *crtc;
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};
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static int drmfb_setcolreg(unsigned regno, unsigned red, unsigned green,
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unsigned blue, unsigned transp,
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struct fb_info *info)
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{
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struct drmfb_par *par = info->par;
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struct drm_framebuffer *fb = par->crtc->fb;
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struct drm_crtc *crtc = par->crtc;
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if (regno > 255)
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return 1;
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if (fb->depth == 8) {
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if (crtc->funcs->gamma_set) {
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crtc->funcs->gamma_set(crtc, red, green, blue, regno);
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}
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return 0;
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}
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if (regno < 16) {
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switch (fb->depth) {
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case 15:
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fb->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
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((green & 0xf800) >> 6) |
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((blue & 0xf800) >> 11);
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break;
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case 16:
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fb->pseudo_palette[regno] = (red & 0xf800) |
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((green & 0xfc00) >> 5) |
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((blue & 0xf800) >> 11);
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break;
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case 24:
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case 32:
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fb->pseudo_palette[regno] = ((red & 0xff00) << 8) |
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(green & 0xff00) |
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((blue & 0xff00) >> 8);
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break;
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}
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}
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return 0;
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}
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static int drmfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
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{
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struct drmfb_par *par = info->par;
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struct drm_device *dev = par->dev;
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struct drm_framebuffer *fb = par->crtc->fb;
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struct drm_display_mode *drm_mode;
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struct drm_output *output;
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int depth;
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if (!var->pixclock)
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return -EINVAL;
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/* Need to resize the fb object !!! */
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if (var->xres > fb->width || var->yres > fb->height) {
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DRM_ERROR("Requested width/height is greater than current fb object %dx%d > %dx%d\n",var->xres,var->yres,fb->width,fb->height);
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DRM_ERROR("Need resizing code.\n");
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return -EINVAL;
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}
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switch (var->bits_per_pixel) {
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case 16:
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depth = (var->green.length == 6) ? 16 : 15;
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break;
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case 32:
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depth = (var->transp.length > 0) ? 32 : 24;
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break;
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default:
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depth = var->bits_per_pixel;
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break;
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}
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switch (depth) {
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case 8:
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var->red.offset = 0;
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var->green.offset = 0;
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var->blue.offset = 0;
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var->red.length = 8;
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var->green.length = 8;
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var->blue.length = 8;
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var->transp.length = 0;
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var->transp.offset = 0;
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break;
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case 15:
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var->red.offset = 10;
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var->green.offset = 5;
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var->blue.offset = 0;
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var->red.length = 5;
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var->green.length = 5;
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var->blue.length = 5;
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var->transp.length = 1;
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var->transp.offset = 15;
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break;
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case 16:
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var->red.offset = 11;
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var->green.offset = 6;
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var->blue.offset = 0;
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var->red.length = 5;
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var->green.length = 6;
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var->blue.length = 5;
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var->transp.length = 0;
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var->transp.offset = 0;
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break;
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case 24:
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var->red.offset = 16;
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var->green.offset = 8;
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var->blue.offset = 0;
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var->red.length = 8;
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var->green.length = 8;
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var->blue.length = 8;
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var->transp.length = 0;
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var->transp.offset = 0;
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break;
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case 32:
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var->red.offset = 16;
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var->green.offset = 8;
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var->blue.offset = 0;
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var->red.length = 8;
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var->green.length = 8;
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var->blue.length = 8;
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var->transp.length = 8;
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var->transp.offset = 24;
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break;
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default:
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return -EINVAL;
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}
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#if 0
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/* Here we walk the output mode list and look for modes. If we haven't
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* got it, then bail. Not very nice, so this is disabled.
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* In the set_par code, we create our mode based on the incoming
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* parameters. Nicer, but may not be desired by some.
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*/
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list_for_each_entry(output, &dev->mode_config.output_list, head) {
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if (output->crtc == par->crtc)
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break;
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}
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list_for_each_entry(drm_mode, &output->modes, head) {
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if (drm_mode->hdisplay == var->xres &&
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drm_mode->vdisplay == var->yres &&
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drm_mode->clock != 0)
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break;
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}
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if (!drm_mode)
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return -EINVAL;
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#endif
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return 0;
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}
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/* this will let fbcon do the mode init */
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static int drmfb_set_par(struct fb_info *info)
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{
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struct drmfb_par *par = info->par;
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struct drm_framebuffer *fb = par->crtc->fb;
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struct drm_device *dev = par->dev;
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struct drm_display_mode *drm_mode;
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struct fb_var_screeninfo *var = &info->var;
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struct drm_output *output;
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switch (var->bits_per_pixel) {
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case 16:
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fb->depth = (var->green.length == 6) ? 16 : 15;
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break;
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case 32:
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fb->depth = (var->transp.length > 0) ? 32 : 24;
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break;
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default:
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fb->depth = var->bits_per_pixel;
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break;
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}
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fb->bits_per_pixel = var->bits_per_pixel;
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info->fix.line_length = fb->pitch;
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info->fix.smem_len = info->fix.line_length * fb->height;
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info->fix.visual = (fb->depth == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
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info->screen_size = info->fix.smem_len; /* ??? */
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/* Should we walk the output's modelist or just create our own ???
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* For now, we create and destroy a mode based on the incoming
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* parameters. But there's commented out code below which scans
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* the output list too.
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*/
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#if 0
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list_for_each_entry(output, &dev->mode_config.output_list, head) {
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if (output->crtc == par->crtc)
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break;
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}
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list_for_each_entry(drm_mode, &output->modes, head) {
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if (drm_mode->hdisplay == var->xres &&
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drm_mode->vdisplay == var->yres &&
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drm_mode->clock != 0)
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break;
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}
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#else
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drm_mode = drm_mode_create(dev);
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drm_mode->hdisplay = var->xres;
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drm_mode->hsync_start = drm_mode->hdisplay + var->right_margin;
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drm_mode->hsync_end = drm_mode->hsync_start + var->hsync_len;
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drm_mode->htotal = drm_mode->hsync_end + var->left_margin;
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drm_mode->vdisplay = var->yres;
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drm_mode->vsync_start = drm_mode->vdisplay + var->lower_margin;
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drm_mode->vsync_end = drm_mode->vsync_start + var->vsync_len;
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drm_mode->vtotal = drm_mode->vsync_end + var->upper_margin;
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drm_mode->clock = PICOS2KHZ(var->pixclock);
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drm_mode->vrefresh = drm_mode_vrefresh(drm_mode);
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drm_mode_set_name(drm_mode);
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#endif
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if (!drm_crtc_set_mode(par->crtc, drm_mode, 0, 0))
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return -EINVAL;
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/* Have to destroy our created mode if we're not searching the mode
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* list for it.
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*/
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#if 1
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drm_mode_destroy(dev, drm_mode);
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#endif
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return 0;
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}
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static struct fb_ops drmfb_ops = {
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.owner = THIS_MODULE,
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// .fb_open = drmfb_open,
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// .fb_read = drmfb_read,
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// .fb_write = drmfb_write,
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// .fb_release = drmfb_release,
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// .fb_ioctl = drmfb_ioctl,
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.fb_check_var = drmfb_check_var,
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.fb_set_par = drmfb_set_par,
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.fb_setcolreg = drmfb_setcolreg,
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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};
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int drmfb_probe(struct drm_device *dev, struct drm_crtc *crtc)
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{
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struct fb_info *info;
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struct drm_framebuffer *fb = crtc->fb;
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struct drmfb_par *par;
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struct device *device = &dev->pdev->dev;
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struct drm_display_mode *mode = crtc->desired_mode;
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int ret;
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info = framebuffer_alloc(sizeof(struct drmfb_par), device);
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if (!info)
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return -ENOMEM;
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fb->fbdev = info;
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par = info->par;
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par->dev = dev;
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par->crtc = crtc;
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info->fbops = &drmfb_ops;
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strcpy(info->fix.id, "drmfb");
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info->fix.type = FB_TYPE_PACKED_PIXELS;
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info->fix.visual = FB_VISUAL_TRUECOLOR;
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info->fix.accel = FB_ACCEL_NONE;
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info->fix.type_aux = 0;
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info->fix.mmio_start = 0;
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info->fix.mmio_len = 0;
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info->fix.line_length = fb->pitch;
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info->fix.smem_start = fb->offset + dev->mode_config.fb_base;
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info->fix.smem_len = info->fix.line_length * fb->height;
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info->flags = FBINFO_DEFAULT;
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ret = drm_mem_reg_ioremap(dev, &fb->bo->mem, &fb->virtual_base);
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if (ret)
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DRM_ERROR("error mapping fb: %d\n", ret);
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info->screen_base = fb->virtual_base;
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info->screen_size = info->fix.smem_len; /* ??? */
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info->pseudo_palette = fb->pseudo_palette;
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info->var.xres_virtual = fb->width;
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info->var.yres_virtual = fb->height;
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info->var.bits_per_pixel = fb->bits_per_pixel;
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info->var.xoffset = 0;
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info->var.yoffset = 0;
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info->var.activate = FB_ACTIVATE_NOW;
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info->var.height = -1;
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info->var.width = -1;
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info->var.vmode = FB_VMODE_NONINTERLACED;
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info->var.xres = mode->hdisplay;
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info->var.right_margin = mode->hsync_start - mode->hdisplay;
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info->var.hsync_len = mode->hsync_end - mode->hsync_start;
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info->var.left_margin = mode->htotal - mode->hsync_end;
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info->var.yres = mode->vdisplay;
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info->var.lower_margin = mode->vsync_start - mode->vdisplay;
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info->var.vsync_len = mode->vsync_end - mode->vsync_start;
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info->var.upper_margin = mode->vtotal - mode->vsync_end;
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info->var.pixclock = 10000000 / mode->htotal * 1000 /
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mode->vtotal * 100;
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/* avoid overflow */
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info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
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DRM_DEBUG("fb depth is %d\n", fb->depth);
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switch(fb->depth) {
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case 8:
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info->var.red.offset = 0;
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info->var.green.offset = 0;
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info->var.blue.offset = 0;
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info->var.red.length = 8; /* 8bit DAC */
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info->var.green.length = 8;
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info->var.blue.length = 8;
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info->var.transp.offset = 0;
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info->var.transp.length = 0;
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break;
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case 15:
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info->var.red.offset = 10;
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info->var.green.offset = 5;
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info->var.blue.offset = 0;
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info->var.red.length = info->var.green.length =
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info->var.blue.length = 5;
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info->var.transp.offset = 15;
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info->var.transp.length = 1;
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break;
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case 16:
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info->var.red.offset = 11;
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info->var.green.offset = 5;
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info->var.blue.offset = 0;
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info->var.red.length = 5;
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info->var.green.length = 6;
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info->var.blue.length = 5;
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info->var.transp.offset = 0;
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info->var.transp.length = 0;
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break;
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case 24:
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info->var.red.offset = 16;
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info->var.green.offset = 8;
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info->var.blue.offset = 0;
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info->var.red.length = info->var.green.length =
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info->var.blue.length = 8;
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info->var.transp.offset = 0;
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info->var.transp.length = 0;
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break;
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case 32:
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info->var.red.offset = 16;
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info->var.green.offset = 8;
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info->var.blue.offset = 0;
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info->var.red.length = info->var.green.length =
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info->var.blue.length = 8;
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info->var.transp.offset = 24;
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info->var.transp.length = 8;
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break;
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default:
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break;
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}
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if (register_framebuffer(info) < 0) {
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unregister_framebuffer(info);
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return -EINVAL;
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}
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printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
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info->fix.id);
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return 0;
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}
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EXPORT_SYMBOL(drmfb_probe);
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int drmfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
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{
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struct fb_info *info = fb->fbdev;
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if (info) {
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drm_mem_reg_iounmap(dev, &fb->bo->mem, fb->virtual_base);
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unregister_framebuffer(info);
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framebuffer_release(info);
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}
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return 0;
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}
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EXPORT_SYMBOL(drmfb_remove);
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MODULE_LICENSE("GPL");
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