diff options
Diffstat (limited to 'drivers/gpu/drm/drm_modes.c')
| -rw-r--r-- | drivers/gpu/drm/drm_modes.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 25bf87390f5..ad74fb4dc54 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -974,3 +974,192 @@ void drm_mode_connector_list_update(struct drm_connector *connector) } } EXPORT_SYMBOL(drm_mode_connector_list_update); + +/** + * drm_mode_parse_command_line_for_connector - parse command line for connector + * @mode_option - per connector mode option + * @connector - connector to parse line for + * + * This parses the connector specific then generic command lines for + * modes and options to configure the connector. + * + * This uses the same parameters as the fb modedb.c, except for extra + * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] + * + * enable/enable Digital/disable bit at the end + */ +bool drm_mode_parse_command_line_for_connector(const char *mode_option, + struct drm_connector *connector, + struct drm_cmdline_mode *mode) +{ + const char *name; + unsigned int namelen; + bool res_specified = false, bpp_specified = false, refresh_specified = false; + unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; + bool yres_specified = false, cvt = false, rb = false; + bool interlace = false, margins = false, was_digit = false; + int i; + enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; + +#ifdef CONFIG_FB + if (!mode_option) + mode_option = fb_mode_option; +#endif + + if (!mode_option) { + mode->specified = false; + return false; + } + + name = mode_option; + namelen = strlen(name); + for (i = namelen-1; i >= 0; i--) { + switch (name[i]) { + case '@': + if (!refresh_specified && !bpp_specified && + !yres_specified && !cvt && !rb && was_digit) { + refresh = simple_strtol(&name[i+1], NULL, 10); + refresh_specified = true; + was_digit = false; + } else + goto done; + break; + case '-': + if (!bpp_specified && !yres_specified && !cvt && + !rb && was_digit) { + bpp = simple_strtol(&name[i+1], NULL, 10); + bpp_specified = true; + was_digit = false; + } else + goto done; + break; + case 'x': + if (!yres_specified && was_digit) { + yres = simple_strtol(&name[i+1], NULL, 10); + yres_specified = true; + was_digit = false; + } else + goto done; + case '0' ... '9': + was_digit = true; + break; + case 'M': + if (yres_specified || cvt || was_digit) + goto done; + cvt = true; + break; + case 'R': + if (yres_specified || cvt || rb || was_digit) + goto done; + rb = true; + break; + case 'm': + if (cvt || yres_specified || was_digit) + goto done; + margins = true; + break; + case 'i': + if (cvt || yres_specified || was_digit) + goto done; + interlace = true; + break; + case 'e': + if (yres_specified || bpp_specified || refresh_specified || + was_digit || (force != DRM_FORCE_UNSPECIFIED)) + goto done; + + force = DRM_FORCE_ON; + break; + case 'D': + if (yres_specified || bpp_specified || refresh_specified || + was_digit || (force != DRM_FORCE_UNSPECIFIED)) + goto done; + + if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && + (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) + force = DRM_FORCE_ON; + else + force = DRM_FORCE_ON_DIGITAL; + break; + case 'd': + if (yres_specified || bpp_specified || refresh_specified || + was_digit || (force != DRM_FORCE_UNSPECIFIED)) + goto done; + + force = DRM_FORCE_OFF; + break; + default: + goto done; + } + } + + if (i < 0 && yres_specified) { + char *ch; + xres = simple_strtol(name, &ch, 10); + if ((ch != NULL) && (*ch == 'x')) + res_specified = true; + else + i = ch - name; + } else if (!yres_specified && was_digit) { + /* catch mode that begins with digits but has no 'x' */ + i = 0; + } +done: + if (i >= 0) { + printk(KERN_WARNING + "parse error at position %i in video mode '%s'\n", + i, name); + mode->specified = false; + return false; + } + + if (res_specified) { + mode->specified = true; + mode->xres = xres; + mode->yres = yres; + } + + if (refresh_specified) { + mode->refresh_specified = true; + mode->refresh = refresh; + } + + if (bpp_specified) { + mode->bpp_specified = true; + mode->bpp = bpp; + } + mode->rb = rb; + mode->cvt = cvt; + mode->interlace = interlace; + mode->margins = margins; + mode->force = force; + + return true; +} +EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); + +struct drm_display_mode * +drm_mode_create_from_cmdline_mode(struct drm_device *dev, + struct drm_cmdline_mode *cmd) +{ + struct drm_display_mode *mode; + + if (cmd->cvt) + mode = drm_cvt_mode(dev, + cmd->xres, cmd->yres, + cmd->refresh_specified ? cmd->refresh : 60, + cmd->rb, cmd->interlace, + cmd->margins); + else + mode = drm_gtf_mode(dev, + cmd->xres, cmd->yres, + cmd->refresh_specified ? cmd->refresh : 60, + cmd->interlace, + cmd->margins); + if (!mode) + return NULL; + + drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); + return mode; +} +EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); |