diff options
Diffstat (limited to 'drivers/gpu/drm/drm_fb_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 224 |
1 files changed, 223 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 2c4671314884..2537d2e81849 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -40,6 +40,196 @@ MODULE_LICENSE("GPL and additional rights"); static LIST_HEAD(kernel_fb_helper_list); +int drm_fb_helper_add_connector(struct drm_connector *connector) +{ + connector->fb_helper_private = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); + if (!connector->fb_helper_private) + return -ENOMEM; + + return 0; + +} +EXPORT_SYMBOL(drm_fb_helper_add_connector); + +static int my_atoi(const char *name) +{ + int val = 0; + + for (;; name++) { + switch (*name) { + case '0' ... '9': + val = 10*val+(*name-'0'); + break; + default: + return val; + } + } +} + +/** + * drm_fb_helper_connector_parse_command_line - parse command line for connector + * @connector - connector to parse line for + * @mode_option - per connector mode option + * + * 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 + */ +static bool drm_fb_helper_connector_parse_command_line(struct drm_connector *connector, + const char *mode_option) +{ + const char *name; + unsigned int namelen; + int res_specified = 0, bpp_specified = 0, refresh_specified = 0; + unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; + int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0; + int i; + enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; + struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private; + struct drm_fb_helper_cmdline_mode *cmdline_mode = &fb_help_conn->cmdline_mode; + + if (!mode_option) + mode_option = fb_mode_option; + + if (!mode_option) { + cmdline_mode->specified = false; + return false; + } + + name = mode_option; + namelen = strlen(name); + for (i = namelen-1; i >= 0; i--) { + switch (name[i]) { + case '@': + namelen = i; + if (!refresh_specified && !bpp_specified && + !yres_specified) { + refresh = my_atoi(&name[i+1]); + refresh_specified = 1; + if (cvt || rb) + cvt = 0; + } else + goto done; + break; + case '-': + namelen = i; + if (!bpp_specified && !yres_specified) { + bpp = my_atoi(&name[i+1]); + bpp_specified = 1; + if (cvt || rb) + cvt = 0; + } else + goto done; + break; + case 'x': + if (!yres_specified) { + yres = my_atoi(&name[i+1]); + yres_specified = 1; + } else + goto done; + case '0' ... '9': + break; + case 'M': + if (!yres_specified) + cvt = 1; + break; + case 'R': + if (!cvt) + rb = 1; + break; + case 'm': + if (!cvt) + margins = 1; + break; + case 'i': + if (!cvt) + interlace = 1; + break; + case 'e': + force = DRM_FORCE_ON; + break; + case 'D': + 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': + force = DRM_FORCE_OFF; + break; + default: + goto done; + } + } + if (i < 0 && yres_specified) { + xres = my_atoi(name); + res_specified = 1; + } +done: + + DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", + drm_get_connector_name(connector), xres, yres, + (refresh) ? refresh : 60, (rb) ? " reduced blanking" : + "", (margins) ? " with margins" : "", (interlace) ? + " interlaced" : ""); + + if (force) { + const char *s; + switch (force) { + case DRM_FORCE_OFF: s = "OFF"; break; + case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break; + default: + case DRM_FORCE_ON: s = "ON"; break; + } + + DRM_INFO("forcing %s connector %s\n", + drm_get_connector_name(connector), s); + connector->force = force; + } + + if (res_specified) { + cmdline_mode->specified = true; + cmdline_mode->xres = xres; + cmdline_mode->yres = yres; + } + + if (refresh_specified) { + cmdline_mode->refresh_specified = true; + cmdline_mode->refresh = refresh; + } + + if (bpp_specified) { + cmdline_mode->bpp_specified = true; + cmdline_mode->bpp = bpp; + } + cmdline_mode->rb = rb ? true : false; + cmdline_mode->cvt = cvt ? true : false; + cmdline_mode->interlace = interlace ? true : false; + + return true; +} + +int drm_fb_helper_parse_command_line(struct drm_device *dev) +{ + struct drm_connector *connector; + + list_for_each_entry(connector, &dev->mode_config.connector_list, head) { + char *option = NULL; + + /* do something on return - turn off connector maybe */ + if (fb_get_options(drm_get_connector_name(connector), &option)) + continue; + + drm_fb_helper_connector_parse_command_line(connector, option); + } + return 0; +} + bool drm_fb_helper_force_kernel_mode(void) { int i = 0; @@ -484,6 +674,8 @@ int drm_fb_helper_single_fb_probe(struct drm_device *dev, 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; @@ -497,8 +689,37 @@ int drm_fb_helper_single_fb_probe(struct drm_device *dev, struct drm_framebuffer *fb; struct drm_mode_set *modeset = NULL; struct drm_fb_helper *fb_helper; + uint32_t surface_depth = 24, surface_bpp = 32; /* 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 = &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) { @@ -527,7 +748,8 @@ int drm_fb_helper_single_fb_probe(struct drm_device *dev, /* 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, &fb); + surface_height, surface_depth, surface_bpp, + &fb); if (ret) return -EINVAL; new_fb = 1; |