diff options
Diffstat (limited to 'drivers/gpu/drm/drm_fb_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 927 |
1 files changed, 534 insertions, 393 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index d2849e4ea4d..d5d8cea1a67 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -27,22 +27,57 @@ * Dave Airlie <airlied@linux.ie> * Jesse Barnes <jesse.barnes@intel.com> */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/kernel.h> #include <linux/sysrq.h> #include <linux/slab.h> #include <linux/fb.h> -#include "drmP.h" -#include "drm_crtc.h" -#include "drm_fb_helper.h" -#include "drm_crtc_helper.h" - -MODULE_AUTHOR("David Airlie, Jesse Barnes"); -MODULE_DESCRIPTION("DRM KMS helper"); -MODULE_LICENSE("GPL and additional rights"); +#include <linux/module.h> +#include <drm/drmP.h> +#include <drm/drm_crtc.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_crtc_helper.h> static LIST_HEAD(kernel_fb_helper_list); -/* simple single crtc case helper function */ +/** + * DOC: fbdev helpers + * + * The fb helper functions are useful to provide an fbdev on top of a drm kernel + * mode setting driver. They can be used mostly independently from the crtc + * helper functions used by many drivers to implement the kernel mode setting + * interfaces. + * + * Initialization is done as a three-step process with drm_fb_helper_init(), + * drm_fb_helper_single_add_all_connectors() and drm_fb_helper_initial_config(). + * Drivers with fancier requirements than the default behaviour can override the + * second step with their own code. Teardown is done with drm_fb_helper_fini(). + * + * At runtime drivers should restore the fbdev console by calling + * drm_fb_helper_restore_fbdev_mode() from their ->lastclose callback. They + * should also notify the fb helper code from updates to the output + * configuration by calling drm_fb_helper_hotplug_event(). For easier + * integration with the output polling code in drm_crtc_helper.c the modeset + * code provides a ->output_poll_changed callback. + * + * All other functions exported by the fb helper library can be used to + * implement the fbdev driver interface by the driver. + */ + +/** + * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev + * emulation helper + * @fb_helper: fbdev initialized with drm_fb_helper_init + * + * This functions adds all the available connectors for use with the given + * fb_helper. This is a separate step to allow drivers to freely assign + * connectors to the fbdev, e.g. if some are reserved for special purposes or + * not adequate to be used for the fbcon. + * + * Since this is part of the initial setup before the fbdev is published, no + * locking is required. + */ int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) { struct drm_device *dev = fb_helper->dev; @@ -70,174 +105,56 @@ fail: } EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); -/** - * 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_fb_helper_connector *fb_helper_conn, - 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_cmdline_mode *cmdline_mode; - struct drm_connector *connector; - - if (!fb_helper_conn) - return false; - connector = fb_helper_conn->connector; - - cmdline_mode = &fb_helper_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 = simple_strtol(&name[i+1], NULL, 10); - refresh_specified = 1; - if (cvt || rb) - cvt = 0; - } else - goto done; - break; - case '-': - namelen = i; - if (!bpp_specified && !yres_specified) { - bpp = simple_strtol(&name[i+1], NULL, 10); - bpp_specified = 1; - if (cvt || rb) - cvt = 0; - } else - goto done; - break; - case 'x': - if (!yres_specified) { - yres = simple_strtol(&name[i+1], NULL, 10); - 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 = simple_strtol(name, NULL, 10); - 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; -} - static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper) { struct drm_fb_helper_connector *fb_helper_conn; int i; for (i = 0; i < fb_helper->connector_count; i++) { + struct drm_cmdline_mode *mode; + struct drm_connector *connector; char *option = NULL; fb_helper_conn = fb_helper->connector_info[i]; + connector = fb_helper_conn->connector; + mode = &fb_helper_conn->cmdline_mode; /* do something on return - turn off connector maybe */ - if (fb_get_options(drm_get_connector_name(fb_helper_conn->connector), &option)) + if (fb_get_options(connector->name, &option)) continue; - drm_fb_helper_connector_parse_command_line(fb_helper_conn, option); + if (drm_mode_parse_command_line_for_connector(option, + connector, + mode)) { + if (mode->force) { + const char *s; + switch (mode->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", + connector->name, s); + connector->force = mode->force; + } + + DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", + connector->name, + mode->xres, mode->yres, + mode->refresh_specified ? mode->refresh : 60, + mode->rb ? " reduced blanking" : "", + mode->margins ? " with margins" : "", + mode->interlace ? " interlaced" : ""); + } + } return 0; } @@ -247,6 +164,9 @@ static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_h uint16_t *r_base, *g_base, *b_base; int i; + if (helper->funcs->gamma_get == NULL) + return; + r_base = crtc->gamma_store; g_base = r_base + crtc->gamma_size; b_base = g_base + crtc->gamma_size; @@ -259,6 +179,9 @@ static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) { uint16_t *r_base, *g_base, *b_base; + if (crtc->funcs->gamma_set == NULL) + return; + r_base = crtc->gamma_store; g_base = r_base + crtc->gamma_size; b_base = g_base + crtc->gamma_size; @@ -266,6 +189,10 @@ static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); } +/** + * drm_fb_helper_debug_enter - implementation for ->fb_debug_enter + * @info: fbdev registered by the helper + */ int drm_fb_helper_debug_enter(struct fb_info *info) { struct drm_fb_helper *helper = info->par; @@ -305,12 +232,16 @@ static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) list_for_each_entry(c, &dev->mode_config.crtc_list, head) { if (crtc->base.id == c->base.id) - return c->fb; + return c->primary->fb; } return NULL; } +/** + * drm_fb_helper_debug_leave - implementation for ->fb_debug_leave + * @info: fbdev registered by the helper + */ int drm_fb_helper_debug_leave(struct fb_info *info) { struct drm_fb_helper *helper = info->par; @@ -342,9 +273,77 @@ int drm_fb_helper_debug_leave(struct fb_info *info) } EXPORT_SYMBOL(drm_fb_helper_debug_leave); -bool drm_fb_helper_force_kernel_mode(void) +static bool restore_fbdev_mode(struct drm_fb_helper *fb_helper) +{ + struct drm_device *dev = fb_helper->dev; + struct drm_plane *plane; + bool error = false; + int i; + + drm_warn_on_modeset_not_all_locked(dev); + + list_for_each_entry(plane, &dev->mode_config.plane_list, head) + if (plane->type != DRM_PLANE_TYPE_PRIMARY) + drm_plane_force_disable(plane); + + for (i = 0; i < fb_helper->crtc_count; i++) { + struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; + struct drm_crtc *crtc = mode_set->crtc; + int ret; + + if (crtc->funcs->cursor_set) { + ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); + if (ret) + error = true; + } + + ret = drm_mode_set_config_internal(mode_set); + if (ret) + error = true; + } + return error; +} +/** + * drm_fb_helper_restore_fbdev_mode - restore fbdev configuration + * @fb_helper: fbcon to restore + * + * This should be called from driver's drm ->lastclose callback + * when implementing an fbcon on top of kms using this helper. This ensures that + * the user isn't greeted with a black screen when e.g. X dies. + * + * Use this variant if you need to bypass locking (panic), or already + * hold all modeset locks. Otherwise use drm_fb_helper_restore_fbdev_mode_unlocked() + */ +static bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper) +{ + return restore_fbdev_mode(fb_helper); +} + +/** + * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration + * @fb_helper: fbcon to restore + * + * This should be called from driver's drm ->lastclose callback + * when implementing an fbcon on top of kms using this helper. This ensures that + * the user isn't greeted with a black screen when e.g. X dies. + */ +bool drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) +{ + struct drm_device *dev = fb_helper->dev; + bool ret; + drm_modeset_lock_all(dev); + ret = restore_fbdev_mode(fb_helper); + drm_modeset_unlock_all(dev); + return ret; +} +EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); + +/* + * restore fbcon display for all kms driver's using this helper, used for sysrq + * and panic handling. + */ +static bool drm_fb_helper_force_kernel_mode(void) { - int i = 0; bool ret, error = false; struct drm_fb_helper *helper; @@ -352,47 +351,78 @@ bool drm_fb_helper_force_kernel_mode(void) return false; list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { - for (i = 0; i < helper->crtc_count; i++) { - struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; - ret = drm_crtc_helper_set_config(mode_set); - if (ret) - error = true; + struct drm_device *dev = helper->dev; + + if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) + continue; + + /* NOTE: we use lockless flag below to avoid grabbing other + * modeset locks. So just trylock the underlying mutex + * directly: + */ + if (!mutex_trylock(&dev->mode_config.mutex)) { + error = true; + continue; } + + ret = drm_fb_helper_restore_fbdev_mode(helper); + if (ret) + error = true; + + mutex_unlock(&dev->mode_config.mutex); } return error; } -int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed, +static int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed, void *panic_str) { - printk(KERN_ERR "panic occurred, switching back to text console\n"); + /* + * It's a waste of time and effort to switch back to text console + * if the kernel should reboot before panic messages can be seen. + */ + if (panic_timeout < 0) + return 0; + + pr_err("panic occurred, switching back to text console\n"); return drm_fb_helper_force_kernel_mode(); - return 0; } -EXPORT_SYMBOL(drm_fb_helper_panic); static struct notifier_block paniced = { .notifier_call = drm_fb_helper_panic, }; -/** - * drm_fb_helper_restore - restore the framebuffer console (kernel) config - * - * Restore's the kernel's fbcon mode, used for lastclose & panic paths. - */ -void drm_fb_helper_restore(void) +static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) { - bool ret; - ret = drm_fb_helper_force_kernel_mode(); - if (ret == true) - DRM_ERROR("Failed to restore crtc configuration\n"); + struct drm_device *dev = fb_helper->dev; + struct drm_crtc *crtc; + int bound = 0, crtcs_bound = 0; + + /* Sometimes user space wants everything disabled, so don't steal the + * display if there's a master. */ + if (dev->primary->master) + return false; + + list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { + if (crtc->primary->fb) + crtcs_bound++; + if (crtc->primary->fb == fb_helper->fb) + bound++; + } + + if (bound < crtcs_bound) + return false; + + return true; } -EXPORT_SYMBOL(drm_fb_helper_restore); #ifdef CONFIG_MAGIC_SYSRQ static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) { - drm_fb_helper_restore(); + bool ret; + ret = drm_fb_helper_force_kernel_mode(); + if (ret == true) + DRM_ERROR("Failed to restore crtc configuration\n"); } static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); @@ -410,117 +440,75 @@ static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; #endif -static void drm_fb_helper_on(struct fb_info *info) +static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) { struct drm_fb_helper *fb_helper = info->par; struct drm_device *dev = fb_helper->dev; struct drm_crtc *crtc; - struct drm_crtc_helper_funcs *crtc_funcs; struct drm_connector *connector; - struct drm_encoder *encoder; int i, j; /* - * For each CRTC in this fb, turn the crtc on then, - * find all associated encoders and turn them on. + * fbdev->blank can be called from irq context in case of a panic. + * Since we already have our own special panic handler which will + * restore the fbdev console mode completely, just bail out early. */ - mutex_lock(&dev->mode_config.mutex); - for (i = 0; i < fb_helper->crtc_count; i++) { - crtc = fb_helper->crtc_info[i].mode_set.crtc; - crtc_funcs = crtc->helper_private; - - if (!crtc->enabled) - continue; - - crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON); - - /* Walk the connectors & encoders on this fb turning them on */ - for (j = 0; j < fb_helper->connector_count; j++) { - connector = fb_helper->connector_info[j]->connector; - connector->dpms = DRM_MODE_DPMS_ON; - drm_connector_property_set_value(connector, - dev->mode_config.dpms_property, - DRM_MODE_DPMS_ON); - } - /* Found a CRTC on this fb, now find encoders */ - list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { - if (encoder->crtc == crtc) { - struct drm_encoder_helper_funcs *encoder_funcs; - - encoder_funcs = encoder->helper_private; - encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON); - } - } - } - mutex_unlock(&dev->mode_config.mutex); -} - -static void drm_fb_helper_off(struct fb_info *info, int dpms_mode) -{ - struct drm_fb_helper *fb_helper = info->par; - struct drm_device *dev = fb_helper->dev; - struct drm_crtc *crtc; - struct drm_crtc_helper_funcs *crtc_funcs; - struct drm_connector *connector; - struct drm_encoder *encoder; - int i, j; + if (oops_in_progress) + return; /* - * For each CRTC in this fb, find all associated encoders - * and turn them off, then turn off the CRTC. + * For each CRTC in this fb, turn the connectors on/off. */ - mutex_lock(&dev->mode_config.mutex); + drm_modeset_lock_all(dev); + if (!drm_fb_helper_is_bound(fb_helper)) { + drm_modeset_unlock_all(dev); + return; + } + for (i = 0; i < fb_helper->crtc_count; i++) { crtc = fb_helper->crtc_info[i].mode_set.crtc; - crtc_funcs = crtc->helper_private; if (!crtc->enabled) continue; - /* Walk the connectors on this fb and mark them off */ + /* Walk the connectors & encoders on this fb turning them on/off */ for (j = 0; j < fb_helper->connector_count; j++) { connector = fb_helper->connector_info[j]->connector; - connector->dpms = dpms_mode; - drm_connector_property_set_value(connector, - dev->mode_config.dpms_property, - dpms_mode); + connector->funcs->dpms(connector, dpms_mode); + drm_object_property_set_value(&connector->base, + dev->mode_config.dpms_property, dpms_mode); } - /* Found a CRTC on this fb, now find encoders */ - list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { - if (encoder->crtc == crtc) { - struct drm_encoder_helper_funcs *encoder_funcs; - - encoder_funcs = encoder->helper_private; - encoder_funcs->dpms(encoder, dpms_mode); - } - } - crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF); } - mutex_unlock(&dev->mode_config.mutex); + drm_modeset_unlock_all(dev); } +/** + * drm_fb_helper_blank - implementation for ->fb_blank + * @blank: desired blanking state + * @info: fbdev registered by the helper + */ int drm_fb_helper_blank(int blank, struct fb_info *info) { switch (blank) { /* Display: On; HSync: On, VSync: On */ case FB_BLANK_UNBLANK: - drm_fb_helper_on(info); + drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); break; /* Display: Off; HSync: On, VSync: On */ case FB_BLANK_NORMAL: - drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY); + drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); break; /* Display: Off; HSync: Off, VSync: On */ case FB_BLANK_HSYNC_SUSPEND: - drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY); + drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); break; /* Display: Off; HSync: On, VSync: Off */ case FB_BLANK_VSYNC_SUSPEND: - drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND); + drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); break; /* Display: Off; HSync: Off, VSync: Off */ case FB_BLANK_POWERDOWN: - drm_fb_helper_off(info, DRM_MODE_DPMS_OFF); + drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); break; } return 0; @@ -534,19 +522,42 @@ static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) for (i = 0; i < helper->connector_count; i++) kfree(helper->connector_info[i]); kfree(helper->connector_info); - for (i = 0; i < helper->crtc_count; i++) + for (i = 0; i < helper->crtc_count; i++) { kfree(helper->crtc_info[i].mode_set.connectors); + if (helper->crtc_info[i].mode_set.mode) + drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); + } kfree(helper->crtc_info); } +/** + * drm_fb_helper_init - initialize a drm_fb_helper structure + * @dev: drm device + * @fb_helper: driver-allocated fbdev helper structure to initialize + * @crtc_count: maximum number of crtcs to support in this fbdev emulation + * @max_conn_count: max connector count + * + * This allocates the structures for the fbdev helper with the given limits. + * Note that this won't yet touch the hardware (through the driver interfaces) + * nor register the fbdev. This is only done in drm_fb_helper_initial_config() + * to allow driver writes more control over the exact init sequence. + * + * Drivers must set fb_helper->funcs before calling + * drm_fb_helper_initial_config(). + * + * RETURNS: + * Zero if everything went ok, nonzero otherwise. + */ int drm_fb_helper_init(struct drm_device *dev, struct drm_fb_helper *fb_helper, int crtc_count, int max_conn_count) { struct drm_crtc *crtc; - int ret = 0; int i; + if (!max_conn_count) + return -EINVAL; + fb_helper->dev = dev; INIT_LIST_HEAD(&fb_helper->kernel_fb_list); @@ -569,20 +580,17 @@ int drm_fb_helper_init(struct drm_device *dev, sizeof(struct drm_connector *), GFP_KERNEL); - if (!fb_helper->crtc_info[i].mode_set.connectors) { - ret = -ENOMEM; + if (!fb_helper->crtc_info[i].mode_set.connectors) goto out_free; - } fb_helper->crtc_info[i].mode_set.num_connectors = 0; } i = 0; list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { - fb_helper->crtc_info[i].crtc_id = crtc->base.id; fb_helper->crtc_info[i].mode_set.crtc = crtc; i++; } - fb_helper->conn_limit = max_conn_count; + return 0; out_free: drm_fb_helper_crtc_free(fb_helper); @@ -595,7 +603,7 @@ void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) if (!list_empty(&fb_helper->kernel_fb_list)) { list_del(&fb_helper->kernel_fb_list); if (list_empty(&kernel_fb_helper_list)) { - printk(KERN_INFO "drm: unregistered panic notifier\n"); + pr_info("drm: unregistered panic notifier\n"); atomic_notifier_chain_unregister(&panic_notifier_list, &paniced); unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); @@ -627,10 +635,23 @@ static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, value = (red << info->var.red.offset) | (green << info->var.green.offset) | (blue << info->var.blue.offset); + if (info->var.transp.length > 0) { + u32 mask = (1 << info->var.transp.length) - 1; + mask <<= info->var.transp.offset; + value |= mask; + } palette[regno] = value; return 0; } + /* + * The driver really shouldn't advertise pseudo/directcolor + * visuals if it can't deal with the palette. + */ + if (WARN_ON(!fb_helper->funcs->gamma_set || + !fb_helper->funcs->gamma_get)) + return -EINVAL; + pindex = regno; if (fb->bits_per_pixel == 16) { @@ -666,15 +687,27 @@ static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, return 0; } +/** + * drm_fb_helper_setcmap - implementation for ->fb_setcmap + * @cmap: cmap to set + * @info: fbdev registered by the helper + */ 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; struct drm_crtc_helper_funcs *crtc_funcs; u16 *red, *green, *blue, *transp; struct drm_crtc *crtc; - int i, rc = 0; + int i, j, rc = 0; int start; + drm_modeset_lock_all(dev); + if (!drm_fb_helper_is_bound(fb_helper)) { + drm_modeset_unlock_all(dev); + return -EBUSY; + } + for (i = 0; i < fb_helper->crtc_count; i++) { crtc = fb_helper->crtc_info[i].mode_set.crtc; crtc_funcs = crtc->helper_private; @@ -685,7 +718,7 @@ int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) transp = cmap->transp; start = cmap->start; - for (i = 0; i < cmap->len; i++) { + for (j = 0; j < cmap->len; j++) { u16 hred, hgreen, hblue, htransp = 0xffff; hred = *red++; @@ -697,14 +730,22 @@ int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); if (rc) - return rc; + goto out; } - crtc_funcs->load_lut(crtc); + if (crtc_funcs->load_lut) + crtc_funcs->load_lut(crtc); } + out: + drm_modeset_unlock_all(dev); return rc; } EXPORT_SYMBOL(drm_fb_helper_setcmap); +/** + * drm_fb_helper_check_var - implementation for ->fb_check_var + * @var: screeninfo to check + * @info: fbdev registered by the helper + */ int drm_fb_helper_check_var(struct fb_var_screeninfo *var, struct fb_info *info) { @@ -716,9 +757,13 @@ int drm_fb_helper_check_var(struct fb_var_screeninfo *var, return -EINVAL; /* Need to resize the fb object !!! */ - if (var->bits_per_pixel > fb->bits_per_pixel || var->xres > fb->width || var->yres > fb->height) { + if (var->bits_per_pixel > fb->bits_per_pixel || + var->xres > fb->width || var->yres > fb->height || + var->xres_virtual > fb->width || var->yres_virtual > fb->height) { DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " - "object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel, + "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", + var->xres, var->yres, var->bits_per_pixel, + var->xres_virtual, var->yres_virtual, fb->width, fb->height, fb->bits_per_pixel); return -EINVAL; } @@ -793,31 +838,25 @@ int drm_fb_helper_check_var(struct fb_var_screeninfo *var, } EXPORT_SYMBOL(drm_fb_helper_check_var); -/* this will let fbcon do the mode init */ +/** + * drm_fb_helper_set_par - implementation for ->fb_set_par + * @info: fbdev registered by the helper + * + * This will let fbcon do the mode init and is called at initialization time by + * the fbdev core when registering the driver, and later on through the hotplug + * callback. + */ 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 CLOCK SET\n"); return -EINVAL; } - mutex_lock(&dev->mode_config.mutex); - for (i = 0; i < fb_helper->crtc_count; i++) { - crtc = fb_helper->crtc_info[i].mode_set.crtc; - ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set); - if (ret) { - mutex_unlock(&dev->mode_config.mutex); - return ret; - } - } - mutex_unlock(&dev->mode_config.mutex); + drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); if (fb_helper->delayed_hotplug) { fb_helper->delayed_hotplug = false; @@ -827,42 +866,54 @@ int drm_fb_helper_set_par(struct fb_info *info) } EXPORT_SYMBOL(drm_fb_helper_set_par); +/** + * drm_fb_helper_pan_display - implementation for ->fb_pan_display + * @var: updated screen information + * @info: fbdev registered by the helper + */ 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; - mutex_lock(&dev->mode_config.mutex); - for (i = 0; i < fb_helper->crtc_count; i++) { - crtc = fb_helper->crtc_info[i].mode_set.crtc; + drm_modeset_lock_all(dev); + if (!drm_fb_helper_is_bound(fb_helper)) { + drm_modeset_unlock_all(dev); + return -EBUSY; + } + for (i = 0; i < fb_helper->crtc_count; i++) { modeset = &fb_helper->crtc_info[i].mode_set; modeset->x = var->xoffset; modeset->y = var->yoffset; if (modeset->num_connectors) { - ret = crtc->funcs->set_config(modeset); + ret = drm_mode_set_config_internal(modeset); if (!ret) { info->var.xoffset = var->xoffset; info->var.yoffset = var->yoffset; } } } - mutex_unlock(&dev->mode_config.mutex); + drm_modeset_unlock_all(dev); return ret; } EXPORT_SYMBOL(drm_fb_helper_pan_display); -int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, - int preferred_bpp) +/* + * Allocates the backing storage and sets up the fbdev info structure through + * the ->fb_probe callback and then registers the fbdev and sets up the panic + * notifier. + */ +static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, + int preferred_bpp) { - int new_fb = 0; + int ret = 0; int crtc_count = 0; int i; struct fb_info *info; @@ -877,13 +928,13 @@ int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, /* if driver picks 8 or 16 by default use that for both depth/bpp */ - if (preferred_bpp != sizes.surface_bpp) { + if (preferred_bpp != sizes.surface_bpp) sizes.surface_depth = sizes.surface_bpp = preferred_bpp; - } + /* first up get a count of crtcs now in use and new min/maxes width/heights */ for (i = 0; i < fb_helper->connector_count; i++) { struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; - struct drm_fb_helper_cmdline_mode *cmdline_mode; + struct drm_cmdline_mode *cmdline_mode; cmdline_mode = &fb_helper_conn->cmdline_mode; @@ -940,51 +991,66 @@ int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, } /* push down into drivers */ - new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); - if (new_fb < 0) - return new_fb; + ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); + if (ret < 0) + return ret; info = fb_helper->fbdev; - /* set the fb pointer */ - for (i = 0; i < fb_helper->crtc_count; i++) { - fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; - } + /* + * Set the fb pointer - usually drm_setup_crtcs does this for hotplug + * events, but at init time drm_setup_crtcs needs to be called before + * the fb is allocated (since we need to figure out the desired size of + * the fb before we can allocate it ...). Hence we need to fix things up + * here again. + */ + for (i = 0; i < fb_helper->crtc_count; i++) + if (fb_helper->crtc_info[i].mode_set.num_connectors) + fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; - if (new_fb) { - info->var.pixclock = 0; - if (register_framebuffer(info) < 0) { - return -EINVAL; - } - printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, - info->fix.id); + info->var.pixclock = 0; + if (register_framebuffer(info) < 0) + return -EINVAL; - } else { - drm_fb_helper_set_par(info); - } + dev_info(fb_helper->dev->dev, "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 "drm: registered panic notifier\n"); + dev_info(fb_helper->dev->dev, "registered panic notifier\n"); atomic_notifier_chain_register(&panic_notifier_list, &paniced); register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); } - if (new_fb) - list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); + + list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); return 0; } -EXPORT_SYMBOL(drm_fb_helper_single_fb_probe); +/** + * drm_fb_helper_fill_fix - initializes fixed fbdev information + * @info: fbdev registered by the helper + * @pitch: desired pitch + * @depth: desired depth + * + * Helper to fill in the fixed fbdev information useful for a non-accelerated + * fbdev emulations. Drivers which support acceleration methods which impose + * additional constraints need to set up their own limits. + * + * Drivers should call this (or their equivalent setup code) from their + * ->fb_probe callback. + */ 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.mmio_start = 0; + info->fix.mmio_len = 0; info->fix.type_aux = 0; info->fix.xpanstep = 1; /* doing it in hw */ info->fix.ypanstep = 1; /* doing it in hw */ @@ -997,6 +1063,20 @@ void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, } EXPORT_SYMBOL(drm_fb_helper_fill_fix); +/** + * drm_fb_helper_fill_var - initalizes variable fbdev information + * @info: fbdev instance to set up + * @fb_helper: fb helper instance to use as template + * @fb_width: desired fb width + * @fb_height: desired fb height + * + * Sets up the variable fbdev metainformation from the given fb helper instance + * and the drm framebuffer allocated in fb_helper->fb. + * + * Drivers should call this (or their equivalent setup code) from their + * ->fb_probe callback after having allocated the fbdev backing + * storage framebuffer. + */ void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, uint32_t fb_width, uint32_t fb_height) { @@ -1005,6 +1085,7 @@ void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helpe info->var.xres_virtual = fb->width; info->var.yres_virtual = fb->height; info->var.bits_per_pixel = fb->bits_per_pixel; + info->var.accel_flags = FB_ACCELF_TEXT; info->var.xoffset = 0; info->var.yoffset = 0; info->var.activate = FB_ACTIVATE_NOW; @@ -1086,32 +1167,34 @@ static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, return count; } -static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) +struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) { struct drm_display_mode *mode; list_for_each_entry(mode, &fb_connector->connector->modes, head) { - if (drm_mode_width(mode) > width || - drm_mode_height(mode) > height) + if (mode->hdisplay > width || + mode->vdisplay > height) continue; if (mode->type & DRM_MODE_TYPE_PREFERRED) return mode; } return NULL; } +EXPORT_SYMBOL(drm_has_preferred_mode); static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) { - struct drm_fb_helper_cmdline_mode *cmdline_mode; + struct drm_cmdline_mode *cmdline_mode; cmdline_mode = &fb_connector->cmdline_mode; return cmdline_mode->specified; } -static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, +struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, int width, int height) { - struct drm_fb_helper_cmdline_mode *cmdline_mode; + struct drm_cmdline_mode *cmdline_mode; struct drm_display_mode *mode = NULL; + bool prefer_non_interlace; cmdline_mode = &fb_helper_conn->cmdline_mode; if (cmdline_mode->specified == false) @@ -1123,6 +1206,8 @@ static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_conne if (cmdline_mode->rb || cmdline_mode->margins) goto create_mode; + prefer_non_interlace = !cmdline_mode->interlace; + again: list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { /* check width/height */ if (mode->hdisplay != cmdline_mode->xres || @@ -1137,37 +1222,35 @@ static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_conne if (cmdline_mode->interlace) { if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) continue; + } else if (prefer_non_interlace) { + if (mode->flags & DRM_MODE_FLAG_INTERLACE) + continue; } return mode; } + if (prefer_non_interlace) { + prefer_non_interlace = false; + goto again; + } + create_mode: - if (cmdline_mode->cvt) - mode = drm_cvt_mode(fb_helper_conn->connector->dev, - cmdline_mode->xres, cmdline_mode->yres, - cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60, - cmdline_mode->rb, cmdline_mode->interlace, - cmdline_mode->margins); - else - mode = drm_gtf_mode(fb_helper_conn->connector->dev, - cmdline_mode->xres, cmdline_mode->yres, - cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60, - cmdline_mode->interlace, - cmdline_mode->margins); - drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); + mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, + cmdline_mode); list_add(&mode->head, &fb_helper_conn->connector->modes); return mode; } +EXPORT_SYMBOL(drm_pick_cmdline_mode); static bool drm_connector_enabled(struct drm_connector *connector, bool strict) { bool enable; - if (strict) { + if (strict) enable = connector->status == connector_status_connected; - } else { + else enable = connector->status != connector_status_disconnected; - } + return enable; } @@ -1244,7 +1327,7 @@ static bool drm_target_cloned(struct drm_fb_helper *fb_helper, /* try and find a 1024x768 mode on each connector */ can_clone = true; - dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60); + dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); for (i = 0; i < fb_helper->connector_count; i++) { @@ -1312,7 +1395,6 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, struct drm_connector *connector; struct drm_connector_helper_funcs *connector_funcs; struct drm_encoder *encoder; - struct drm_fb_helper_crtc *best_crtc; int my_score, best_score, score; struct drm_fb_helper_crtc **crtcs, *crtc; struct drm_fb_helper_connector *fb_helper_conn; @@ -1324,7 +1406,6 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, connector = fb_helper_conn->connector; best_crtcs[n] = NULL; - best_crtc = NULL; best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); if (modes[n] == NULL) return best_score; @@ -1352,9 +1433,8 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, for (c = 0; c < fb_helper->crtc_count; c++) { crtc = &fb_helper->crtc_info[c]; - if ((encoder->possible_crtcs & (1 << c)) == 0) { + if ((encoder->possible_crtcs & (1 << c)) == 0) continue; - } for (o = 0; o < n; o++) if (best_crtcs[o] == crtc) @@ -1374,7 +1454,6 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, width, height); if (score > best_score) { - best_crtc = crtc; best_score = score; memcpy(best_crtcs, crtcs, dev->mode_config.num_connector * @@ -1391,47 +1470,54 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) struct drm_device *dev = fb_helper->dev; struct drm_fb_helper_crtc **crtcs; struct drm_display_mode **modes; - struct drm_encoder *encoder; struct drm_mode_set *modeset; bool *enabled; int width, height; - int i, ret; + int i; DRM_DEBUG_KMS("\n"); width = dev->mode_config.max_width; height = dev->mode_config.max_height; - /* clean out all the encoder/crtc combos */ - list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { - encoder->crtc = NULL; - } - crtcs = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); modes = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_display_mode *), GFP_KERNEL); enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool), GFP_KERNEL); + if (!crtcs || !modes || !enabled) { + DRM_ERROR("Memory allocation failed\n"); + goto out; + } + drm_enable_connectors(fb_helper, enabled); - ret = drm_target_cloned(fb_helper, modes, enabled, width, height); - if (!ret) { - ret = drm_target_preferred(fb_helper, modes, enabled, width, height); - if (!ret) + if (!(fb_helper->funcs->initial_config && + fb_helper->funcs->initial_config(fb_helper, crtcs, modes, + enabled, width, height))) { + memset(modes, 0, dev->mode_config.num_connector*sizeof(modes[0])); + memset(crtcs, 0, dev->mode_config.num_connector*sizeof(crtcs[0])); + + if (!drm_target_cloned(fb_helper, + modes, enabled, width, height) && + !drm_target_preferred(fb_helper, + modes, enabled, width, height)) DRM_ERROR("Unable to find initial modes\n"); - } - DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height); + DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", + width, height); - drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); + drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); + } /* need to set the modesets up here for use later */ /* fill out the connector<->crtc mappings into the modesets */ for (i = 0; i < fb_helper->crtc_count; i++) { modeset = &fb_helper->crtc_info[i].mode_set; modeset->num_connectors = 0; + modeset->fb = NULL; } for (i = 0; i < fb_helper->connector_count; i++) { @@ -1448,25 +1534,45 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) modeset->mode = drm_mode_duplicate(dev, fb_crtc->desired_mode); modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; + modeset->fb = fb_helper->fb; } } + /* Clear out any old modes if there are no more connected outputs. */ + for (i = 0; i < fb_helper->crtc_count; i++) { + modeset = &fb_helper->crtc_info[i].mode_set; + if (modeset->num_connectors == 0) { + BUG_ON(modeset->fb); + BUG_ON(modeset->num_connectors); + if (modeset->mode) + drm_mode_destroy(dev, modeset->mode); + modeset->mode = NULL; + } + } +out: kfree(crtcs); kfree(modes); kfree(enabled); } /** - * drm_helper_initial_config - setup a sane initial connector configuration - * @dev: DRM device + * drm_fb_helper_initial_config - setup a sane initial connector configuration + * @fb_helper: fb_helper device struct + * @bpp_sel: bpp value to use for the framebuffer configuration * - * LOCKING: - * Called at init time, must take mode config lock. - * - * Scan the CRTCs and connectors and try to put together an initial setup. + * Scans the CRTCs and connectors and tries to put together an initial setup. * At the moment, this is a cloned configuration across all heads with * a new framebuffer object as the backing store. * + * Note that this also registers the fbdev and so allows userspace to call into + * the driver through the fbdev interfaces. + * + * This function will call down into the ->fb_probe callback to let + * the driver allocate and initialize the fbdev info structure and the drm + * framebuffer used to back the fbdev. drm_fb_helper_fill_var() and + * drm_fb_helper_fill_fix() are provided as helpers to setup simple default + * values for the fbdev info structure. + * * RETURNS: * Zero if everything went ok, nonzero otherwise. */ @@ -1475,58 +1581,93 @@ bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) struct drm_device *dev = fb_helper->dev; int count = 0; - /* disable all the possible outputs/crtcs before entering KMS mode */ - drm_helper_disable_unused_functions(fb_helper->dev); - drm_fb_helper_parse_command_line(fb_helper); + mutex_lock(&dev->mode_config.mutex); count = drm_fb_helper_probe_connector_modes(fb_helper, dev->mode_config.max_width, dev->mode_config.max_height); + mutex_unlock(&dev->mode_config.mutex); /* * we shouldn't end up with no modes here. */ - if (count == 0) { - printk(KERN_INFO "No connectors reported connected with modes\n"); - } + if (count == 0) + dev_info(fb_helper->dev->dev, "No connectors reported connected with modes\n"); + drm_setup_crtcs(fb_helper); return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); } EXPORT_SYMBOL(drm_fb_helper_initial_config); -bool drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) +/** + * drm_fb_helper_hotplug_event - respond to a hotplug notification by + * probing all the outputs attached to the fb + * @fb_helper: the drm_fb_helper + * + * Scan the connectors attached to the fb_helper and try to put together a + * setup after *notification of a change in output configuration. + * + * Called at runtime, takes the mode config locks to be able to check/change the + * modeset configuration. Must be run from process context (which usually means + * either the output polling work or a work item launched from the driver's + * hotplug interrupt). + * + * Note that the driver must ensure that this is only called _after_ the fb has + * been fully set up, i.e. after the call to drm_fb_helper_initial_config. + * + * RETURNS: + * 0 on success and a non-zero error code otherwise. + */ +int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) { - int count = 0; - u32 max_width, max_height, bpp_sel; - bool bound = false, crtcs_bound = false; - struct drm_crtc *crtc; + struct drm_device *dev = fb_helper->dev; + u32 max_width, max_height; if (!fb_helper->fb) - return false; - - list_for_each_entry(crtc, &fb_helper->dev->mode_config.crtc_list, head) { - if (crtc->fb) - crtcs_bound = true; - if (crtc->fb == fb_helper->fb) - bound = true; - } + return 0; - if (!bound && crtcs_bound) { + mutex_lock(&fb_helper->dev->mode_config.mutex); + if (!drm_fb_helper_is_bound(fb_helper)) { fb_helper->delayed_hotplug = true; - return false; + mutex_unlock(&fb_helper->dev->mode_config.mutex); + return 0; } DRM_DEBUG_KMS("\n"); max_width = fb_helper->fb->width; max_height = fb_helper->fb->height; - bpp_sel = fb_helper->fb->bits_per_pixel; - count = drm_fb_helper_probe_connector_modes(fb_helper, max_width, - max_height); + drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height); + mutex_unlock(&fb_helper->dev->mode_config.mutex); + + drm_modeset_lock_all(dev); drm_setup_crtcs(fb_helper); + drm_modeset_unlock_all(dev); + drm_fb_helper_set_par(fb_helper->fbdev); - return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); + return 0; } EXPORT_SYMBOL(drm_fb_helper_hotplug_event); +/* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) + * but the module doesn't depend on any fb console symbols. At least + * attempt to load fbcon to avoid leaving the system without a usable console. + */ +#if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) +static int __init drm_fb_helper_modinit(void) +{ + const char *name = "fbcon"; + struct module *fbcon; + + mutex_lock(&module_mutex); + fbcon = find_module(name); + mutex_unlock(&module_mutex); + + if (!fbcon) + request_module_nowait(name); + return 0; +} + +module_init(drm_fb_helper_modinit); +#endif |