From 7d9485e2c53caaaed9606a39de1c2746cc9ba262 Mon Sep 17 00:00:00 2001 From: Bernie Thompson Date: Mon, 15 Feb 2010 06:46:08 -0800 Subject: [PATCH] Staging: udlfb: Add functions to expose sysfs metrics and controls Add sysfs controls for edid and performance metrics There are 8 new files exposed in /sys/class/graphics/fb* edid - returns 128 byte edid blog, suitable for parsing with parse-edid metrics_bytes_identical metrics_bytes_rendered metrics_bytes_sent metrics_cpu_kcycles_used metrics_misc and metrics_reset, which resets all perf metrics to zero The 6 perf metrics are of type atomic_t. So these metrics return precise results for short benchmarks, but any test approx a minute or longer runtime may roll over. Signed-off-by: Bernie Thompson Signed-off-by: Greg Kroah-Hartman --- drivers/staging/udlfb/udlfb.c | 251 ++++++++++++++++++++++++++++++++++ drivers/staging/udlfb/udlfb.h | 18 +++ 2 files changed, 269 insertions(+) diff --git a/drivers/staging/udlfb/udlfb.c b/drivers/staging/udlfb/udlfb.c index 8d8372fd1b36..01672df7a243 100644 --- a/drivers/staging/udlfb/udlfb.c +++ b/drivers/staging/udlfb/udlfb.c @@ -818,6 +818,21 @@ static void dlfb_ops_fillrect(struct fb_info *info, } +static void dlfb_get_edid(struct dlfb_data *dev) +{ + int i; + int ret; + char rbuf[2]; + + for (i = 0; i < sizeof(dev->edid); i++) { + ret = usb_control_msg(dev->udev, + usb_rcvctrlpipe(dev->udev, 0), (0x02), + (0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2, + 0); + dev->edid[i] = rbuf[1]; + } +} + static int dlfb_ops_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) { @@ -924,6 +939,33 @@ static void dlfb_delete(struct kref *kref) kfree(dev); } +/* + * Check whether a video mode is supported by the DisplayLink chip + * We start from monitor's modes, so don't need to filter that here + */ +static int dlfb_is_valid_mode(struct fb_videomode *mode, + struct fb_info *info) +{ + struct dlfb_data *dev = info->par; + + if (mode->xres * mode->yres > dev->sku_pixel_limit) + return 0; + + return 1; +} + +static void dlfb_var_color_format(struct fb_var_screeninfo *var) +{ + const struct fb_bitfield red = { 11, 5, 0 }; + const struct fb_bitfield green = { 5, 6, 0 }; + const struct fb_bitfield blue = { 0, 5, 0 }; + + var->bits_per_pixel = 16; + var->red = red; + var->green = green; + var->blue = blue; +} + static int dlfb_ops_blank(int blank_mode, struct fb_info *info) { struct dlfb_data *dev_info = info->par; @@ -953,6 +995,215 @@ static struct fb_ops dlfb_ops = { .fb_blank = dlfb_ops_blank, }; +/* + * Calls dlfb_get_edid() to query the EDID of attached monitor via usb cmds + * Then parses EDID into three places used by various parts of fbdev: + * fb_var_screeninfo contains the timing of the monitor's preferred mode + * fb_info.monspecs is full parsed EDID info, including monspecs.modedb + * fb_info.modelist is a linked list of all monitor & VESA modes which work + * + * If EDID is not readable/valid, then modelist is all VESA modes, + * monspecs is NULL, and fb_var_screeninfo is set to safe VESA mode + * Returns 0 if EDID parses successfully + */ +static int dlfb_parse_edid(struct dlfb_data *dev, + struct fb_var_screeninfo *var, + struct fb_info *info) +{ + int i; + const struct fb_videomode *default_vmode = NULL; + int result = 0; + + fb_destroy_modelist(&info->modelist); + memset(&info->monspecs, 0, sizeof(info->monspecs)); + + dlfb_get_edid(dev); + fb_edid_to_monspecs(dev->edid, &info->monspecs); + + if (info->monspecs.modedb_len > 0) { + + for (i = 0; i < info->monspecs.modedb_len; i++) { + if (dlfb_is_valid_mode(&info->monspecs.modedb[i], info)) + fb_add_videomode(&info->monspecs.modedb[i], + &info->modelist); + } + + default_vmode = fb_find_best_display(&info->monspecs, + &info->modelist); + } else { + struct fb_videomode fb_vmode = {0}; + + dl_err("Unable to get valid EDID from device/display\n"); + result = 1; + + /* + * Add the standard VESA modes to our modelist + * Since we don't have EDID, there may be modes that + * overspec monitor and/or are incorrect aspect ratio, etc. + * But at least the user has a chance to choose + */ + for (i = 0; i < VESA_MODEDB_SIZE; i++) { + if (dlfb_is_valid_mode((struct fb_videomode *) + &vesa_modes[i], info)) + fb_add_videomode(&vesa_modes[i], + &info->modelist); + } + + /* + * default to resolution safe for projectors + * (since they are most common case without EDID) + */ + fb_vmode.xres = 800; + fb_vmode.yres = 600; + fb_vmode.refresh = 60; + default_vmode = fb_find_nearest_mode(&fb_vmode, + &info->modelist); + } + + fb_videomode_to_var(var, default_vmode); + dlfb_var_color_format(var); + + return result; +} + +static ssize_t metrics_bytes_rendered_show(struct device *fbdev, + struct device_attribute *a, char *buf) { + struct fb_info *fb_info = dev_get_drvdata(fbdev); + struct dlfb_data *dev = fb_info->par; + return snprintf(buf, PAGE_SIZE, "%u\n", + atomic_read(&dev->bytes_rendered)); +} + +static ssize_t metrics_bytes_identical_show(struct device *fbdev, + struct device_attribute *a, char *buf) { + struct fb_info *fb_info = dev_get_drvdata(fbdev); + struct dlfb_data *dev = fb_info->par; + return snprintf(buf, PAGE_SIZE, "%u\n", + atomic_read(&dev->bytes_identical)); +} + +static ssize_t metrics_bytes_sent_show(struct device *fbdev, + struct device_attribute *a, char *buf) { + struct fb_info *fb_info = dev_get_drvdata(fbdev); + struct dlfb_data *dev = fb_info->par; + return snprintf(buf, PAGE_SIZE, "%u\n", + atomic_read(&dev->bytes_sent)); +} + +static ssize_t metrics_cpu_kcycles_used_show(struct device *fbdev, + struct device_attribute *a, char *buf) { + struct fb_info *fb_info = dev_get_drvdata(fbdev); + struct dlfb_data *dev = fb_info->par; + return snprintf(buf, PAGE_SIZE, "%u\n", + atomic_read(&dev->cpu_kcycles_used)); +} + +static ssize_t metrics_misc_show(struct device *fbdev, + struct device_attribute *a, char *buf) { + struct fb_info *fb_info = dev_get_drvdata(fbdev); + struct dlfb_data *dev = fb_info->par; + return snprintf(buf, PAGE_SIZE, + "Calls to\ndamage: %u\nblit: %u\n" + "defio faults: %u\ncopy: %u\n" + "fill: %u\n\n" + "active framebuffer clients: %d\n" + "urbs available %d(%d)\n" + "Shadow framebuffer in use? %s\n" + "Any lost pixels? %s\n", + atomic_read(&dev->damage_count), + atomic_read(&dev->blit_count), + atomic_read(&dev->defio_fault_count), + atomic_read(&dev->copy_count), + atomic_read(&dev->fill_count), + dev->fb_count, + dev->urbs.available, dev->urbs.limit_sem.count, + (dev->backing_buffer) ? "yes" : "no", + atomic_read(&dev->lost_pixels) ? "yes" : "no"); +} + +static ssize_t edid_show(struct kobject *kobj, struct bin_attribute *a, + char *buf, loff_t off, size_t count) { + struct device *fbdev = container_of(kobj, struct device, kobj); + struct fb_info *fb_info = dev_get_drvdata(fbdev); + struct dlfb_data *dev = fb_info->par; + char *edid = &dev->edid[0]; + const size_t size = sizeof(dev->edid); + + if (dlfb_parse_edid(dev, &fb_info->var, fb_info)) + return 0; + + if (off >= size) + return 0; + + if (off + count > size) + count = size - off; + memcpy(buf, edid + off, count); + + return count; +} + + +static ssize_t metrics_reset_store(struct device *fbdev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct fb_info *fb_info = dev_get_drvdata(fbdev); + struct dlfb_data *dev = fb_info->par; + + atomic_set(&dev->bytes_rendered, 0); + atomic_set(&dev->bytes_identical, 0); + atomic_set(&dev->bytes_sent, 0); + atomic_set(&dev->cpu_kcycles_used, 0); + atomic_set(&dev->blit_count, 0); + atomic_set(&dev->copy_count, 0); + atomic_set(&dev->fill_count, 0); + atomic_set(&dev->defio_fault_count, 0); + atomic_set(&dev->damage_count, 0); + + return count; +} + +static ssize_t use_defio_show(struct device *fbdev, + struct device_attribute *a, char *buf) { + struct fb_info *fb_info = dev_get_drvdata(fbdev); + struct dlfb_data *dev = fb_info->par; + return snprintf(buf, PAGE_SIZE, "%d\n", + atomic_read(&dev->use_defio)); +} + +static ssize_t use_defio_store(struct device *fbdev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct fb_info *fb_info = dev_get_drvdata(fbdev); + struct dlfb_data *dev = fb_info->par; + + if (count > 0) { + if (buf[0] == '0') + atomic_set(&dev->use_defio, 0); + if (buf[0] == '1') + atomic_set(&dev->use_defio, 1); + } + return count; +} + +static struct bin_attribute edid_attr = { + .attr.name = "edid", + .attr.mode = 0444, + .size = 128, + .read = edid_show, +}; + +static struct device_attribute fb_device_attrs[] = { + __ATTR_RO(metrics_bytes_rendered), + __ATTR_RO(metrics_bytes_identical), + __ATTR_RO(metrics_bytes_sent), + __ATTR_RO(metrics_cpu_kcycles_used), + __ATTR_RO(metrics_misc), + __ATTR(metrics_reset, S_IWUGO, NULL, metrics_reset_store), + __ATTR_RW(use_defio), +}; + /* * This is necessary before we can communicate with the display controller. */ diff --git a/drivers/staging/udlfb/udlfb.h b/drivers/staging/udlfb/udlfb.h index 13f992fe45f7..ef343a6052d6 100644 --- a/drivers/staging/udlfb/udlfb.h +++ b/drivers/staging/udlfb/udlfb.h @@ -33,8 +33,12 @@ struct dlfb_data { char *bufend; char *backing_buffer; struct mutex bulk_mutex; + int fb_count; + atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */ atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */ + atomic_t use_defio; /* 0 = rely on ioctls and blit/copy/fill rects */ char edid[128]; + int sku_pixel_limit; int screen_size; int line_length; struct completion done; @@ -43,6 +47,17 @@ struct dlfb_data { int base8; int base8d; u32 pseudo_palette[256]; + /* blit-only rendering path metrics, exposed through sysfs */ + atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */ + atomic_t bytes_identical; /* saved effort with backbuffer comparison */ + atomic_t bytes_sent; /* to usb, after compression including overhead */ + atomic_t cpu_kcycles_used; /* transpired during pixel processing */ + /* interface usage metrics. Clients can call driver via several */ + atomic_t blit_count; + atomic_t copy_count; + atomic_t fill_count; + atomic_t damage_count; + atomic_t defio_fault_count; }; #define NR_USB_REQUEST_I2C_SUB_IO 0x02 @@ -99,6 +114,9 @@ static int dlfb_bulk_msg(struct dlfb_data *dev_info, int len) #define dlfb_set_register insert_command +/* remove once this gets added to sysfs.h */ +#define __ATTR_RW(attr) __ATTR(attr, 0644, attr##_show, attr##_store) + #define dl_err(format, arg...) \ dev_err(dev->gdev, "dlfb: " format, ## arg) #define dl_warn(format, arg...) \ -- 2.34.1