Hi Peter, On 3 October 2016 at 10:09, Peter Jones <pjones@xxxxxxxxxx> wrote: > Userland sometimes needs to know what the framebuffer configuration was > when the firmware was running. This enables us to render localized > status strings during firmware updates using the data from the ACPI BGRT > table and the protocol described at the url below: > > https://msdn.microsoft.com/en-us/windows/hardware/drivers/bringup/boot-screen-components > > This patch also fixes up efifb's printk() usage to use pr_warn() / > pr_info() / pr_err() instead. > > Signed-off-by: Peter Jones <pjones@xxxxxxxxxx> I've given this a spin on arm64 (QEMU), and it works as expected. Tested-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> Since you're the maintainer of efifb, how do you expect this to be taken in? -- Ard. > --- > drivers/video/fbdev/efifb.c | 59 +++++++++++++++++++++++++++++++++++---------- > 1 file changed, 46 insertions(+), 13 deletions(-) > > diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c > index 924bad4..099b76b 100644 > --- a/drivers/video/fbdev/efifb.c > +++ b/drivers/video/fbdev/efifb.c > @@ -118,6 +118,31 @@ static inline bool fb_base_is_valid(void) > return false; > } > > +#define efifb_attr_decl(name, fmt) \ > +static ssize_t name##_show(struct device *dev, \ > + struct device_attribute *attr, \ > + char *buf) \ > +{ \ > + return sprintf(buf, fmt "\n", (screen_info.lfb_##name)); \ > +} \ > +static DEVICE_ATTR_RO(name) > + > +efifb_attr_decl(base, "0x%x"); > +efifb_attr_decl(linelength, "%u"); > +efifb_attr_decl(height, "%u"); > +efifb_attr_decl(width, "%u"); > +efifb_attr_decl(depth, "%u"); > + > +static struct attribute *efifb_attrs[] = { > + &dev_attr_base.attr, > + &dev_attr_linelength.attr, > + &dev_attr_width.attr, > + &dev_attr_height.attr, > + &dev_attr_depth.attr, > + NULL > +}; > +ATTRIBUTE_GROUPS(efifb); > + > static int efifb_probe(struct platform_device *dev) > { > struct fb_info *info; > @@ -205,14 +230,13 @@ static int efifb_probe(struct platform_device *dev) > } else { > /* We cannot make this fatal. Sometimes this comes from magic > spaces our resource handlers simply don't know about */ > - printk(KERN_WARNING > - "efifb: cannot reserve video memory at 0x%lx\n", > + pr_warn("efifb: cannot reserve video memory at 0x%lx\n", > efifb_fix.smem_start); > } > > info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev); > if (!info) { > - printk(KERN_ERR "efifb: cannot allocate framebuffer\n"); > + pr_err("efifb: cannot allocate framebuffer\n"); > err = -ENOMEM; > goto err_release_mem; > } > @@ -230,16 +254,15 @@ static int efifb_probe(struct platform_device *dev) > > info->screen_base = ioremap_wc(efifb_fix.smem_start, efifb_fix.smem_len); > if (!info->screen_base) { > - printk(KERN_ERR "efifb: abort, cannot ioremap video memory " > - "0x%x @ 0x%lx\n", > + pr_err("efifb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n", > efifb_fix.smem_len, efifb_fix.smem_start); > err = -EIO; > goto err_release_fb; > } > > - printk(KERN_INFO "efifb: framebuffer at 0x%lx, using %dk, total %dk\n", > + pr_info("efifb: framebuffer at 0x%lx, using %dk, total %dk\n", > efifb_fix.smem_start, size_remap/1024, size_total/1024); > - printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n", > + pr_info("efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n", > efifb_defined.xres, efifb_defined.yres, > efifb_defined.bits_per_pixel, efifb_fix.line_length, > screen_info.pages); > @@ -247,7 +270,7 @@ static int efifb_probe(struct platform_device *dev) > efifb_defined.xres_virtual = efifb_defined.xres; > efifb_defined.yres_virtual = efifb_fix.smem_len / > efifb_fix.line_length; > - printk(KERN_INFO "efifb: scrolling: redraw\n"); > + pr_info("efifb: scrolling: redraw\n"); > efifb_defined.yres_virtual = efifb_defined.yres; > > /* some dummy values for timing to make fbset happy */ > @@ -265,7 +288,7 @@ static int efifb_probe(struct platform_device *dev) > efifb_defined.transp.offset = screen_info.rsvd_pos; > efifb_defined.transp.length = screen_info.rsvd_size; > > - printk(KERN_INFO "efifb: %s: " > + pr_info("efifb: %s: " > "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", > "Truecolor", > screen_info.rsvd_size, > @@ -285,12 +308,19 @@ static int efifb_probe(struct platform_device *dev) > info->fix = efifb_fix; > info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE; > > - if ((err = fb_alloc_cmap(&info->cmap, 256, 0)) < 0) { > - printk(KERN_ERR "efifb: cannot allocate colormap\n"); > + err = sysfs_create_groups(&dev->dev.kobj, efifb_groups); > + if (err) { > + pr_err("efifb: cannot add sysfs attrs\n"); > goto err_unmap; > } > - if ((err = register_framebuffer(info)) < 0) { > - printk(KERN_ERR "efifb: cannot register framebuffer\n"); > + err = fb_alloc_cmap(&info->cmap, 256, 0); > + if (err < 0) { > + pr_err("efifb: cannot allocate colormap\n"); > + goto err_groups; > + } > + err = register_framebuffer(info); > + if (err < 0) { > + pr_err("efifb: cannot register framebuffer\n"); > goto err_fb_dealoc; > } > fb_info(info, "%s frame buffer device\n", info->fix.id); > @@ -298,6 +328,8 @@ static int efifb_probe(struct platform_device *dev) > > err_fb_dealoc: > fb_dealloc_cmap(&info->cmap); > +err_groups: > + sysfs_remove_groups(&dev->dev.kobj, efifb_groups); > err_unmap: > iounmap(info->screen_base); > err_release_fb: > @@ -313,6 +345,7 @@ static int efifb_remove(struct platform_device *pdev) > struct fb_info *info = platform_get_drvdata(pdev); > > unregister_framebuffer(info); > + sysfs_remove_groups(&pdev->dev.kobj, efifb_groups); > framebuffer_release(info); > > return 0; > -- > 2.10.0 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-efi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
