1031 lines
26 KiB
C
1031 lines
26 KiB
C
/*
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* Copyright (c) 2006-2009 Red Hat Inc.
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* Copyright (c) 2006-2008 Intel Corporation
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* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
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*
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* DRM framebuffer helper functions
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*
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* Authors:
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* Dave Airlie <airlied@linux.ie>
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* Jesse Barnes <jesse.barnes@intel.com>
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*/
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#include <linux/sysrq.h>
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#include <linux/fb.h>
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#include "drmP.h"
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#include "drm_crtc.h"
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#include "drm_fb_helper.h"
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#include "drm_crtc_helper.h"
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MODULE_AUTHOR("David Airlie, Jesse Barnes");
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MODULE_DESCRIPTION("DRM KMS helper");
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MODULE_LICENSE("GPL and additional rights");
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static LIST_HEAD(kernel_fb_helper_list);
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int drm_fb_helper_add_connector(struct drm_connector *connector)
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{
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connector->fb_helper_private = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL);
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if (!connector->fb_helper_private)
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return -ENOMEM;
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return 0;
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}
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EXPORT_SYMBOL(drm_fb_helper_add_connector);
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static int my_atoi(const char *name)
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{
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int val = 0;
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for (;; name++) {
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switch (*name) {
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case '0' ... '9':
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val = 10*val+(*name-'0');
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break;
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default:
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return val;
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}
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}
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}
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/**
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* drm_fb_helper_connector_parse_command_line - parse command line for connector
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* @connector - connector to parse line for
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* @mode_option - per connector mode option
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*
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* This parses the connector specific then generic command lines for
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* modes and options to configure the connector.
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*
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* This uses the same parameters as the fb modedb.c, except for extra
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* <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
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*
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* enable/enable Digital/disable bit at the end
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*/
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static bool drm_fb_helper_connector_parse_command_line(struct drm_connector *connector,
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const char *mode_option)
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{
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const char *name;
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unsigned int namelen;
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int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
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unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
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int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
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int i;
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enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
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struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private;
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struct drm_fb_helper_cmdline_mode *cmdline_mode;
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if (!fb_help_conn)
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return false;
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cmdline_mode = &fb_help_conn->cmdline_mode;
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if (!mode_option)
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mode_option = fb_mode_option;
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if (!mode_option) {
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cmdline_mode->specified = false;
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return false;
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}
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name = mode_option;
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namelen = strlen(name);
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for (i = namelen-1; i >= 0; i--) {
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switch (name[i]) {
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case '@':
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namelen = i;
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if (!refresh_specified && !bpp_specified &&
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!yres_specified) {
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refresh = my_atoi(&name[i+1]);
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refresh_specified = 1;
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if (cvt || rb)
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cvt = 0;
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} else
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goto done;
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break;
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case '-':
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namelen = i;
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if (!bpp_specified && !yres_specified) {
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bpp = my_atoi(&name[i+1]);
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bpp_specified = 1;
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if (cvt || rb)
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cvt = 0;
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} else
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goto done;
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break;
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case 'x':
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if (!yres_specified) {
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yres = my_atoi(&name[i+1]);
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yres_specified = 1;
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} else
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goto done;
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case '0' ... '9':
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break;
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case 'M':
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if (!yres_specified)
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cvt = 1;
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break;
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case 'R':
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if (!cvt)
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rb = 1;
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break;
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case 'm':
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if (!cvt)
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margins = 1;
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break;
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case 'i':
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if (!cvt)
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interlace = 1;
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break;
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case 'e':
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force = DRM_FORCE_ON;
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break;
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case 'D':
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if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) ||
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(connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
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force = DRM_FORCE_ON;
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else
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force = DRM_FORCE_ON_DIGITAL;
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break;
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case 'd':
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force = DRM_FORCE_OFF;
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break;
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default:
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goto done;
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}
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}
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if (i < 0 && yres_specified) {
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xres = my_atoi(name);
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res_specified = 1;
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}
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done:
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DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
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drm_get_connector_name(connector), xres, yres,
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(refresh) ? refresh : 60, (rb) ? " reduced blanking" :
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"", (margins) ? " with margins" : "", (interlace) ?
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" interlaced" : "");
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if (force) {
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const char *s;
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switch (force) {
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case DRM_FORCE_OFF: s = "OFF"; break;
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case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
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default:
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case DRM_FORCE_ON: s = "ON"; break;
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}
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DRM_INFO("forcing %s connector %s\n",
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drm_get_connector_name(connector), s);
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connector->force = force;
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}
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if (res_specified) {
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cmdline_mode->specified = true;
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cmdline_mode->xres = xres;
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cmdline_mode->yres = yres;
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}
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if (refresh_specified) {
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cmdline_mode->refresh_specified = true;
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cmdline_mode->refresh = refresh;
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}
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if (bpp_specified) {
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cmdline_mode->bpp_specified = true;
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cmdline_mode->bpp = bpp;
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}
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cmdline_mode->rb = rb ? true : false;
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cmdline_mode->cvt = cvt ? true : false;
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cmdline_mode->interlace = interlace ? true : false;
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return true;
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}
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int drm_fb_helper_parse_command_line(struct drm_device *dev)
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{
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struct drm_connector *connector;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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char *option = NULL;
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/* do something on return - turn off connector maybe */
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if (fb_get_options(drm_get_connector_name(connector), &option))
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continue;
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drm_fb_helper_connector_parse_command_line(connector, option);
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}
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return 0;
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}
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bool drm_fb_helper_force_kernel_mode(void)
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{
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int i = 0;
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bool ret, error = false;
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struct drm_fb_helper *helper;
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if (list_empty(&kernel_fb_helper_list))
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return false;
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list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
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for (i = 0; i < helper->crtc_count; i++) {
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struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
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ret = drm_crtc_helper_set_config(mode_set);
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if (ret)
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error = true;
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}
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}
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return error;
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}
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int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
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void *panic_str)
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{
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DRM_ERROR("panic occurred, switching back to text console\n");
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return drm_fb_helper_force_kernel_mode();
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return 0;
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}
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EXPORT_SYMBOL(drm_fb_helper_panic);
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static struct notifier_block paniced = {
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.notifier_call = drm_fb_helper_panic,
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};
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/**
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* drm_fb_helper_restore - restore the framebuffer console (kernel) config
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*
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* Restore's the kernel's fbcon mode, used for lastclose & panic paths.
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*/
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void drm_fb_helper_restore(void)
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{
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bool ret;
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ret = drm_fb_helper_force_kernel_mode();
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if (ret == true)
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DRM_ERROR("Failed to restore crtc configuration\n");
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}
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EXPORT_SYMBOL(drm_fb_helper_restore);
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#ifdef CONFIG_MAGIC_SYSRQ
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static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
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{
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drm_fb_helper_restore();
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}
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static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
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static void drm_fb_helper_sysrq(int dummy1, struct tty_struct *dummy3)
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{
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schedule_work(&drm_fb_helper_restore_work);
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}
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static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
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.handler = drm_fb_helper_sysrq,
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.help_msg = "force-fb(V)",
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.action_msg = "Restore framebuffer console",
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};
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#endif
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static void drm_fb_helper_on(struct fb_info *info)
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{
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struct drm_fb_helper *fb_helper = info->par;
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struct drm_device *dev = fb_helper->dev;
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struct drm_crtc *crtc;
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struct drm_encoder *encoder;
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int i;
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/*
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* For each CRTC in this fb, turn the crtc on then,
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* find all associated encoders and turn them on.
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*/
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for (i = 0; i < fb_helper->crtc_count; i++) {
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list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
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struct drm_crtc_helper_funcs *crtc_funcs =
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crtc->helper_private;
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/* Only mess with CRTCs in this fb */
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if (crtc->base.id != fb_helper->crtc_info[i].crtc_id ||
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!crtc->enabled)
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continue;
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mutex_lock(&dev->mode_config.mutex);
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crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
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mutex_unlock(&dev->mode_config.mutex);
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/* Found a CRTC on this fb, now find encoders */
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
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if (encoder->crtc == crtc) {
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struct drm_encoder_helper_funcs *encoder_funcs;
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encoder_funcs = encoder->helper_private;
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mutex_lock(&dev->mode_config.mutex);
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encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
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mutex_unlock(&dev->mode_config.mutex);
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}
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}
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}
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}
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}
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static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
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{
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struct drm_fb_helper *fb_helper = info->par;
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struct drm_device *dev = fb_helper->dev;
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struct drm_crtc *crtc;
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struct drm_encoder *encoder;
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int i;
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/*
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* For each CRTC in this fb, find all associated encoders
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* and turn them off, then turn off the CRTC.
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*/
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for (i = 0; i < fb_helper->crtc_count; i++) {
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list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
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struct drm_crtc_helper_funcs *crtc_funcs =
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crtc->helper_private;
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/* Only mess with CRTCs in this fb */
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if (crtc->base.id != fb_helper->crtc_info[i].crtc_id ||
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!crtc->enabled)
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continue;
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/* Found a CRTC on this fb, now find encoders */
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
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if (encoder->crtc == crtc) {
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struct drm_encoder_helper_funcs *encoder_funcs;
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encoder_funcs = encoder->helper_private;
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mutex_lock(&dev->mode_config.mutex);
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encoder_funcs->dpms(encoder, dpms_mode);
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mutex_unlock(&dev->mode_config.mutex);
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}
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}
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if (dpms_mode == DRM_MODE_DPMS_OFF) {
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mutex_lock(&dev->mode_config.mutex);
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crtc_funcs->dpms(crtc, dpms_mode);
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mutex_unlock(&dev->mode_config.mutex);
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}
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}
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}
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}
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int drm_fb_helper_blank(int blank, struct fb_info *info)
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{
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switch (blank) {
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case FB_BLANK_UNBLANK:
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drm_fb_helper_on(info);
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break;
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case FB_BLANK_NORMAL:
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drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
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break;
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case FB_BLANK_HSYNC_SUSPEND:
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drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
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break;
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case FB_BLANK_VSYNC_SUSPEND:
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drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
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break;
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case FB_BLANK_POWERDOWN:
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drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
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break;
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}
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return 0;
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}
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EXPORT_SYMBOL(drm_fb_helper_blank);
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static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
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{
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int i;
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for (i = 0; i < helper->crtc_count; i++)
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kfree(helper->crtc_info[i].mode_set.connectors);
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kfree(helper->crtc_info);
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}
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int drm_fb_helper_init_crtc_count(struct drm_fb_helper *helper, int crtc_count, int max_conn_count)
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{
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struct drm_device *dev = helper->dev;
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struct drm_crtc *crtc;
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int ret = 0;
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int i;
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helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
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if (!helper->crtc_info)
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return -ENOMEM;
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helper->crtc_count = crtc_count;
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for (i = 0; i < crtc_count; i++) {
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helper->crtc_info[i].mode_set.connectors =
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kcalloc(max_conn_count,
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sizeof(struct drm_connector *),
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GFP_KERNEL);
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if (!helper->crtc_info[i].mode_set.connectors) {
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ret = -ENOMEM;
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goto out_free;
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}
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helper->crtc_info[i].mode_set.num_connectors = 0;
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}
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i = 0;
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list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
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helper->crtc_info[i].crtc_id = crtc->base.id;
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helper->crtc_info[i].mode_set.crtc = crtc;
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i++;
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}
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helper->conn_limit = max_conn_count;
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return 0;
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out_free:
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drm_fb_helper_crtc_free(helper);
|
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return -ENOMEM;
|
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}
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EXPORT_SYMBOL(drm_fb_helper_init_crtc_count);
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|
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static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
|
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u16 blue, u16 regno, struct fb_info *info)
|
|
{
|
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struct drm_fb_helper *fb_helper = info->par;
|
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struct drm_framebuffer *fb = fb_helper->fb;
|
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int pindex;
|
|
|
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if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
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u32 *palette;
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u32 value;
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/* place color in psuedopalette */
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if (regno > 16)
|
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return -EINVAL;
|
|
palette = (u32 *)info->pseudo_palette;
|
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red >>= (16 - info->var.red.length);
|
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green >>= (16 - info->var.green.length);
|
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blue >>= (16 - info->var.blue.length);
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value = (red << info->var.red.offset) |
|
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(green << info->var.green.offset) |
|
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(blue << info->var.blue.offset);
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palette[regno] = value;
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return 0;
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}
|
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pindex = regno;
|
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|
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if (fb->bits_per_pixel == 16) {
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pindex = regno << 3;
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|
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if (fb->depth == 16 && regno > 63)
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return -EINVAL;
|
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if (fb->depth == 15 && regno > 31)
|
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return -EINVAL;
|
|
|
|
if (fb->depth == 16) {
|
|
u16 r, g, b;
|
|
int i;
|
|
if (regno < 32) {
|
|
for (i = 0; i < 8; i++)
|
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fb_helper->funcs->gamma_set(crtc, red,
|
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green, blue, pindex + i);
|
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}
|
|
|
|
fb_helper->funcs->gamma_get(crtc, &r,
|
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&g, &b,
|
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pindex >> 1);
|
|
|
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for (i = 0; i < 4; i++)
|
|
fb_helper->funcs->gamma_set(crtc, r,
|
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green, b,
|
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(pindex >> 1) + i);
|
|
}
|
|
}
|
|
|
|
if (fb->depth != 16)
|
|
fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
|
|
return 0;
|
|
}
|
|
|
|
int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
|
|
{
|
|
struct drm_fb_helper *fb_helper = info->par;
|
|
struct drm_device *dev = fb_helper->dev;
|
|
u16 *red, *green, *blue, *transp;
|
|
struct drm_crtc *crtc;
|
|
int i, rc = 0;
|
|
int start;
|
|
|
|
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
|
|
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
|
|
for (i = 0; i < fb_helper->crtc_count; i++) {
|
|
if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
|
|
break;
|
|
}
|
|
if (i == fb_helper->crtc_count)
|
|
continue;
|
|
|
|
red = cmap->red;
|
|
green = cmap->green;
|
|
blue = cmap->blue;
|
|
transp = cmap->transp;
|
|
start = cmap->start;
|
|
|
|
for (i = 0; i < cmap->len; i++) {
|
|
u16 hred, hgreen, hblue, htransp = 0xffff;
|
|
|
|
hred = *red++;
|
|
hgreen = *green++;
|
|
hblue = *blue++;
|
|
|
|
if (transp)
|
|
htransp = *transp++;
|
|
|
|
rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
crtc_funcs->load_lut(crtc);
|
|
}
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_setcmap);
|
|
|
|
int drm_fb_helper_setcolreg(unsigned regno,
|
|
unsigned red,
|
|
unsigned green,
|
|
unsigned blue,
|
|
unsigned transp,
|
|
struct fb_info *info)
|
|
{
|
|
struct drm_fb_helper *fb_helper = info->par;
|
|
struct drm_device *dev = fb_helper->dev;
|
|
struct drm_crtc *crtc;
|
|
int i;
|
|
int ret;
|
|
|
|
if (regno > 255)
|
|
return 1;
|
|
|
|
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
|
|
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
|
|
for (i = 0; i < fb_helper->crtc_count; i++) {
|
|
if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
|
|
break;
|
|
}
|
|
if (i == fb_helper->crtc_count)
|
|
continue;
|
|
|
|
ret = setcolreg(crtc, red, green, blue, regno, info);
|
|
if (ret)
|
|
return ret;
|
|
|
|
crtc_funcs->load_lut(crtc);
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_setcolreg);
|
|
|
|
int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
|
|
struct fb_info *info)
|
|
{
|
|
struct drm_fb_helper *fb_helper = info->par;
|
|
struct drm_framebuffer *fb = fb_helper->fb;
|
|
int depth;
|
|
|
|
if (var->pixclock != 0)
|
|
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 = 5;
|
|
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;
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_check_var);
|
|
|
|
/* this will let fbcon do the mode init */
|
|
int drm_fb_helper_set_par(struct fb_info *info)
|
|
{
|
|
struct drm_fb_helper *fb_helper = info->par;
|
|
struct drm_device *dev = fb_helper->dev;
|
|
struct fb_var_screeninfo *var = &info->var;
|
|
struct drm_crtc *crtc;
|
|
int ret;
|
|
int i;
|
|
|
|
if (var->pixclock != 0) {
|
|
DRM_ERROR("PIXEL CLCOK SET\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
|
|
|
|
for (i = 0; i < fb_helper->crtc_count; i++) {
|
|
if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
|
|
break;
|
|
}
|
|
if (i == fb_helper->crtc_count)
|
|
continue;
|
|
|
|
if (crtc->fb == fb_helper->crtc_info[i].mode_set.fb) {
|
|
mutex_lock(&dev->mode_config.mutex);
|
|
ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
|
|
mutex_unlock(&dev->mode_config.mutex);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_set_par);
|
|
|
|
int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
|
|
struct fb_info *info)
|
|
{
|
|
struct drm_fb_helper *fb_helper = info->par;
|
|
struct drm_device *dev = fb_helper->dev;
|
|
struct drm_mode_set *modeset;
|
|
struct drm_crtc *crtc;
|
|
int ret = 0;
|
|
int i;
|
|
|
|
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
|
|
for (i = 0; i < fb_helper->crtc_count; i++) {
|
|
if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
|
|
break;
|
|
}
|
|
|
|
if (i == fb_helper->crtc_count)
|
|
continue;
|
|
|
|
modeset = &fb_helper->crtc_info[i].mode_set;
|
|
|
|
modeset->x = var->xoffset;
|
|
modeset->y = var->yoffset;
|
|
|
|
if (modeset->num_connectors) {
|
|
mutex_lock(&dev->mode_config.mutex);
|
|
ret = crtc->funcs->set_config(modeset);
|
|
mutex_unlock(&dev->mode_config.mutex);
|
|
if (!ret) {
|
|
info->var.xoffset = var->xoffset;
|
|
info->var.yoffset = var->yoffset;
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_pan_display);
|
|
|
|
int drm_fb_helper_single_fb_probe(struct drm_device *dev,
|
|
int preferred_bpp,
|
|
int (*fb_create)(struct drm_device *dev,
|
|
uint32_t fb_width,
|
|
uint32_t fb_height,
|
|
uint32_t surface_width,
|
|
uint32_t surface_height,
|
|
uint32_t surface_depth,
|
|
uint32_t surface_bpp,
|
|
struct drm_framebuffer **fb_ptr))
|
|
{
|
|
struct drm_crtc *crtc;
|
|
struct drm_connector *connector;
|
|
unsigned int fb_width = (unsigned)-1, fb_height = (unsigned)-1;
|
|
unsigned int surface_width = 0, surface_height = 0;
|
|
int new_fb = 0;
|
|
int crtc_count = 0;
|
|
int ret, i, conn_count = 0;
|
|
struct fb_info *info;
|
|
struct drm_framebuffer *fb;
|
|
struct drm_mode_set *modeset = NULL;
|
|
struct drm_fb_helper *fb_helper;
|
|
uint32_t surface_depth = 24, surface_bpp = 32;
|
|
|
|
/* if driver picks 8 or 16 by default use that
|
|
for both depth/bpp */
|
|
if (preferred_bpp != surface_bpp) {
|
|
surface_depth = surface_bpp = preferred_bpp;
|
|
}
|
|
/* first up get a count of crtcs now in use and new min/maxes width/heights */
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private;
|
|
|
|
struct drm_fb_helper_cmdline_mode *cmdline_mode;
|
|
|
|
if (!fb_help_conn)
|
|
continue;
|
|
|
|
cmdline_mode = &fb_help_conn->cmdline_mode;
|
|
|
|
if (cmdline_mode->bpp_specified) {
|
|
switch (cmdline_mode->bpp) {
|
|
case 8:
|
|
surface_depth = surface_bpp = 8;
|
|
break;
|
|
case 15:
|
|
surface_depth = 15;
|
|
surface_bpp = 16;
|
|
break;
|
|
case 16:
|
|
surface_depth = surface_bpp = 16;
|
|
break;
|
|
case 24:
|
|
surface_depth = surface_bpp = 24;
|
|
break;
|
|
case 32:
|
|
surface_depth = 24;
|
|
surface_bpp = 32;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
|
|
if (drm_helper_crtc_in_use(crtc)) {
|
|
if (crtc->desired_mode) {
|
|
if (crtc->desired_mode->hdisplay < fb_width)
|
|
fb_width = crtc->desired_mode->hdisplay;
|
|
|
|
if (crtc->desired_mode->vdisplay < fb_height)
|
|
fb_height = crtc->desired_mode->vdisplay;
|
|
|
|
if (crtc->desired_mode->hdisplay > surface_width)
|
|
surface_width = crtc->desired_mode->hdisplay;
|
|
|
|
if (crtc->desired_mode->vdisplay > surface_height)
|
|
surface_height = crtc->desired_mode->vdisplay;
|
|
}
|
|
crtc_count++;
|
|
}
|
|
}
|
|
|
|
if (crtc_count == 0 || fb_width == -1 || fb_height == -1) {
|
|
/* hmm everyone went away - assume VGA cable just fell out
|
|
and will come back later. */
|
|
return 0;
|
|
}
|
|
|
|
/* do we have an fb already? */
|
|
if (list_empty(&dev->mode_config.fb_kernel_list)) {
|
|
ret = (*fb_create)(dev, fb_width, fb_height, surface_width,
|
|
surface_height, surface_depth, surface_bpp,
|
|
&fb);
|
|
if (ret)
|
|
return -EINVAL;
|
|
new_fb = 1;
|
|
} else {
|
|
fb = list_first_entry(&dev->mode_config.fb_kernel_list,
|
|
struct drm_framebuffer, filp_head);
|
|
|
|
/* if someone hotplugs something bigger than we have already allocated, we are pwned.
|
|
As really we can't resize an fbdev that is in the wild currently due to fbdev
|
|
not really being designed for the lower layers moving stuff around under it.
|
|
- so in the grand style of things - punt. */
|
|
if ((fb->width < surface_width) ||
|
|
(fb->height < surface_height)) {
|
|
DRM_ERROR("Framebuffer not large enough to scale console onto.\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
info = fb->fbdev;
|
|
fb_helper = info->par;
|
|
|
|
crtc_count = 0;
|
|
/* okay we need to setup new connector sets in the crtcs */
|
|
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
|
|
modeset = &fb_helper->crtc_info[crtc_count].mode_set;
|
|
modeset->fb = fb;
|
|
conn_count = 0;
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
if (connector->encoder)
|
|
if (connector->encoder->crtc == modeset->crtc) {
|
|
modeset->connectors[conn_count] = connector;
|
|
conn_count++;
|
|
if (conn_count > fb_helper->conn_limit)
|
|
BUG();
|
|
}
|
|
}
|
|
|
|
for (i = conn_count; i < fb_helper->conn_limit; i++)
|
|
modeset->connectors[i] = NULL;
|
|
|
|
modeset->crtc = crtc;
|
|
crtc_count++;
|
|
|
|
modeset->num_connectors = conn_count;
|
|
if (modeset->crtc->desired_mode) {
|
|
if (modeset->mode)
|
|
drm_mode_destroy(dev, modeset->mode);
|
|
modeset->mode = drm_mode_duplicate(dev,
|
|
modeset->crtc->desired_mode);
|
|
}
|
|
}
|
|
fb_helper->crtc_count = crtc_count;
|
|
fb_helper->fb = fb;
|
|
|
|
if (new_fb) {
|
|
info->var.pixclock = 0;
|
|
if (register_framebuffer(info) < 0)
|
|
return -EINVAL;
|
|
} else {
|
|
drm_fb_helper_set_par(info);
|
|
}
|
|
printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
|
|
info->fix.id);
|
|
|
|
/* Switch back to kernel console on panic */
|
|
/* multi card linked list maybe */
|
|
if (list_empty(&kernel_fb_helper_list)) {
|
|
printk(KERN_INFO "registered panic notifier\n");
|
|
atomic_notifier_chain_register(&panic_notifier_list,
|
|
&paniced);
|
|
register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
|
|
}
|
|
list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
|
|
|
|
void drm_fb_helper_free(struct drm_fb_helper *helper)
|
|
{
|
|
list_del(&helper->kernel_fb_list);
|
|
if (list_empty(&kernel_fb_helper_list)) {
|
|
printk(KERN_INFO "unregistered panic notifier\n");
|
|
atomic_notifier_chain_unregister(&panic_notifier_list,
|
|
&paniced);
|
|
unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
|
|
}
|
|
drm_fb_helper_crtc_free(helper);
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_free);
|
|
|
|
void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
|
|
uint32_t depth)
|
|
{
|
|
info->fix.type = FB_TYPE_PACKED_PIXELS;
|
|
info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
|
|
FB_VISUAL_TRUECOLOR;
|
|
info->fix.type_aux = 0;
|
|
info->fix.xpanstep = 1; /* doing it in hw */
|
|
info->fix.ypanstep = 1; /* doing it in hw */
|
|
info->fix.ywrapstep = 0;
|
|
info->fix.accel = FB_ACCEL_NONE;
|
|
info->fix.type_aux = 0;
|
|
|
|
info->fix.line_length = pitch;
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_fill_fix);
|
|
|
|
void drm_fb_helper_fill_var(struct fb_info *info, struct drm_framebuffer *fb,
|
|
uint32_t fb_width, uint32_t fb_height)
|
|
{
|
|
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;
|
|
|
|
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 = 5;
|
|
info->var.green.length = 5;
|
|
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 = 8;
|
|
info->var.green.length = 8;
|
|
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 = 8;
|
|
info->var.green.length = 8;
|
|
info->var.blue.length = 8;
|
|
info->var.transp.offset = 24;
|
|
info->var.transp.length = 8;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
info->var.xres = fb_width;
|
|
info->var.yres = fb_height;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_fill_var);
|