From 785b93ef8c309730c2de84ce9c229e40e2d01480 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Fri, 28 Aug 2009 15:46:53 +1000 Subject: drm/kms: move driver specific fb common code to helper functions (v2) Initially I always meant this code to be shared, but things ran away from me before I got to it. This refactors the i915 and radeon kms fbdev interaction layers out into generic helpers + driver specific pieces. It moves all the panic/sysrq enhancements to the core file, and stores a linked list of kernel fbs. This could possibly be improved to only store the fb which has fbcon on it for panics etc. radeon retains some specific codes used for a big endian workaround. changes: fix oops in v1 fix freeing path for crtc_info Reviewed-by: Jesse Barnes Signed-off-by: Dave Airlie --- drivers/gpu/drm/drm_fb_helper.c | 697 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 697 insertions(+) create mode 100644 drivers/gpu/drm/drm_fb_helper.c (limited to 'drivers/gpu/drm/drm_fb_helper.c') diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c new file mode 100644 index 0000000..d6ffea7 --- /dev/null +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -0,0 +1,697 @@ +/* + * Copyright (c) 2006-2009 Red Hat Inc. + * Copyright (c) 2006-2008 Intel Corporation + * Copyright (c) 2007 Dave Airlie + * + * DRM framebuffer helper functions + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting documentation, and + * that the name of the copyright holders not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. The copyright holders make no representations + * about the suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + * + * Authors: + * Dave Airlie + * Jesse Barnes + */ +#include +#include +#include "drmP.h" +#include "drm_crtc.h" +#include "drm_fb_helper.h" +#include "drm_crtc_helper.h" + +static LIST_HEAD(kernel_fb_helper_list); + +bool drm_fb_helper_force_kernel_mode(void) +{ + int i = 0; + bool ret, error = false; + struct drm_fb_helper *helper; + + if (list_empty(&kernel_fb_helper_list)) + 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; + } + } + return error; +} + +int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed, + void *panic_str) +{ + DRM_ERROR("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) +{ + bool ret; + ret = drm_fb_helper_force_kernel_mode(); + if (ret == true) + DRM_ERROR("Failed to restore crtc configuration\n"); +} +EXPORT_SYMBOL(drm_fb_helper_restore); + +static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) +{ + drm_fb_helper_restore(); +} +static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); + +static void drm_fb_helper_sysrq(int dummy1, struct tty_struct *dummy3) +{ + schedule_work(&drm_fb_helper_restore_work); +} + +static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { + .handler = drm_fb_helper_sysrq, + .help_msg = "force-fb(V)", + .action_msg = "Restore framebuffer console", +}; + +static void drm_fb_helper_on(struct fb_info *info) +{ + struct drm_fb_helper *fb_helper = info->par; + struct drm_device *dev = fb_helper->dev; + struct drm_crtc *crtc; + struct drm_encoder *encoder; + int i; + + /* + * For each CRTC in this fb, turn the crtc on then, + * find all associated encoders and turn them on. + */ + 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; + } + + mutex_lock(&dev->mode_config.mutex); + crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON); + mutex_unlock(&dev->mode_config.mutex); + + /* 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; + mutex_lock(&dev->mode_config.mutex); + 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_encoder *encoder; + int i; + + /* + * For each CRTC in this fb, find all associated encoders + * and turn them off, then turn off the CRTC. + */ + 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; + } + + /* 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; + mutex_lock(&dev->mode_config.mutex); + encoder_funcs->dpms(encoder, dpms_mode); + mutex_unlock(&dev->mode_config.mutex); + } + } + if (dpms_mode == DRM_MODE_DPMS_OFF) { + mutex_lock(&dev->mode_config.mutex); + crtc_funcs->dpms(crtc, dpms_mode); + mutex_unlock(&dev->mode_config.mutex); + } + } +} + +int drm_fb_helper_blank(int blank, struct fb_info *info) +{ + switch (blank) { + case FB_BLANK_UNBLANK: + drm_fb_helper_on(info); + break; + case FB_BLANK_NORMAL: + drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY); + break; + case FB_BLANK_HSYNC_SUSPEND: + drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY); + break; + case FB_BLANK_VSYNC_SUSPEND: + drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND); + break; + case FB_BLANK_POWERDOWN: + drm_fb_helper_off(info, DRM_MODE_DPMS_OFF); + break; + } + return 0; +} +EXPORT_SYMBOL(drm_fb_helper_blank); + +static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) +{ + int i; + + for (i = 0; i < helper->crtc_count; i++) + kfree(helper->crtc_info[i].mode_set.connectors); + kfree(helper->crtc_info); +} + +int drm_fb_helper_init_crtc_count(struct drm_fb_helper *helper, int crtc_count, int max_conn_count) +{ + struct drm_device *dev = helper->dev; + struct drm_crtc *crtc; + int ret = 0; + int i; + + helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); + if (!helper->crtc_info) + return -ENOMEM; + + helper->crtc_count = crtc_count; + + for (i = 0; i < crtc_count; i++) { + helper->crtc_info[i].mode_set.connectors = + kcalloc(max_conn_count, + sizeof(struct drm_connector *), + GFP_KERNEL); + + if (!helper->crtc_info[i].mode_set.connectors) { + ret = -ENOMEM; + goto out_free; + } + helper->crtc_info[i].mode_set.num_connectors = 0; + } + + i = 0; + list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { + helper->crtc_info[i].crtc_id = crtc->base.id; + helper->crtc_info[i].mode_set.crtc = crtc; + i++; + } + helper->conn_limit = max_conn_count; + return 0; +out_free: + drm_fb_helper_crtc_free(helper); + return -ENOMEM; +} +EXPORT_SYMBOL(drm_fb_helper_init_crtc_count); + +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; + + list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { + struct drm_framebuffer *fb = fb_helper->fb; + + 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 (regno > 255) + return 1; + + if (fb->depth == 8) { + fb_helper->funcs->gamma_set(crtc, red, green, blue, regno); + return 0; + } + + if (regno < 16) { + switch (fb->depth) { + case 15: + fb->pseudo_palette[regno] = ((red & 0xf800) >> 1) | + ((green & 0xf800) >> 6) | + ((blue & 0xf800) >> 11); + break; + case 16: + fb->pseudo_palette[regno] = (red & 0xf800) | + ((green & 0xfc00) >> 5) | + ((blue & 0xf800) >> 11); + break; + case 24: + case 32: + fb->pseudo_palette[regno] = + (((red >> 8) & 0xff) << info->var.red.offset) | + (((green >> 8) & 0xff) << info->var.green.offset) | + (((blue >> 8) & 0xff) << info->var.blue.offset); + break; + } + } + } + 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 == -1 || !var->pixclock) + 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 != -1) { + 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->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 (*fb_create)(struct drm_device *dev, + uint32_t fb_width, + uint32_t fb_height, + uint32_t surface_width, + uint32_t surface_height, + 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; + + /* first up get a count of crtcs now in use and new min/maxes width/heights */ + 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, &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 = -1; + 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) +{ + info->fix.type = FB_TYPE_PACKED_PIXELS; + info->fix.visual = 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_I830; + 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); -- cgit v1.1