On Thu, 25 February 2010 Jiri Kosina <jkosina@xxxxxxx> wrote:
> On Wed, 24 Feb 2010, Bruno Prémont wrote:
>
> > +config HID_PICOLCD
> > + tristate "Minibox PicoLCD (graphic version)"
> > + depends on FB
> > + select FB_DEFERRED_IO
> > + select FB_SYS_FILLRECT
> > + select FB_SYS_COPYAREA
> > + select FB_SYS_IMAGEBLIT
> > + select FB_SYS_FOPS
> > + select BACKLIGHT_LCD_SUPPORT
> > + select BACKLIGHT_CLASS_DEVICE
> > + select LCD_CLASS_DEVICE
>
> I guess you need dependency on USB_HID as well, right?
Yep, will add
> > --- a/drivers/hid/hid-picolcd.c
> > +++ b/drivers/hid/hid-picolcd.c
> > @@ -0,0 +1,1075 @@
> > +/***************************************************************************
> > + * Copyright (C) 2010 by Bruno Prémont <bonbons@xxxxxxxxxxxxxxxxx> *
> > + * *
> > + * Based on Logitech G13 driver (v0.4) *
> > + * Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@xxxxxxxxxxx> *
> > + * *
> > + * This program is free software: you can redistribute it and/or modify *
> > + * it under the terms of the GNU General Public License as published by *
> > + * the Free Software Foundation, either version 2 of the License. *
>
> I support removing the 'or any later' clause, but I think your
> version has the grammar wrong :)
Oops, will fix
> > +/* Update fb_vbitmap from the screen_base and send changed tiles to device */
> > +static void picolcd_fb_update(struct picolcd_data *data)
> > +{
> > + int chip, tile;
> > +
> > + spin_lock(&data->lock);
> > + if (!(data->status & PICOLCD_READY_FB)) {
> > + spin_unlock(&data->lock);
> > + picolcd_fb_reset(data->hdev, 0);
> > + } else
> > + spin_unlock(&data->lock);
>
> Please put the brackets to the else branch as well.
Ok, will add the brackets while switching from spin_(un)lock to
spin_(un)lock_irq{save|restore}.
> Also, it'd be great if the framebuffer part would get Ack from
> someone more familiar with framebuffer code than me.
I would appreciate such one as well, especially regarding the
deferredio part and the more advanced fb use. For now I only tested
read/write from /dev/fbx.
For the two sysfs attributes I currently use, the 'reset' one shall
probably be moved to debugfs (I would like to place it under
/sys/kernel/debug/hid/$device/ next to rdesc and event).
By the way, I'm wondering why event does not list any of the reports
coming from my device though as I understand the code it should be
doing that before my raw_event function gets called...
The one for deferredio refresh rate should ideally go below fb device
(and I guess that might also be of use for other users of deferredio)
Thanks for the review,
Bruno
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