Re: [PATCH 6/8] hid/picolcd: Use fb_ops helpers for deferred I/O

2023-09-04 Thread Javier Martinez Canillas
Thomas Zimmermann  writes:

> Generate callback functions for struct fb_ops with the fbdev macro
> FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(). Initialize struct fb_ops to
> the generated functions with an fbdev initializer macro.
>
> Signed-off-by: Thomas Zimmermann 
> Cc: Jiri Kosina 
> Cc: Benjamin Tissoires 
> Cc: "Bruno Prémont" 
> ---

Acked-by: Javier Martinez Canillas 

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat



[PATCH 6/8] hid/picolcd: Use fb_ops helpers for deferred I/O

2023-08-28 Thread Thomas Zimmermann
Generate callback functions for struct fb_ops with the fbdev macro
FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(). Initialize struct fb_ops to
the generated functions with an fbdev initializer macro.

Signed-off-by: Thomas Zimmermann 
Cc: Jiri Kosina 
Cc: Benjamin Tissoires 
Cc: "Bruno Prémont" 
---
 drivers/hid/Kconfig  |  6 +--
 drivers/hid/hid-picolcd_fb.c | 73 ++--
 2 files changed, 20 insertions(+), 59 deletions(-)

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index b50054a41c10..dbf632bb7e26 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -871,11 +871,7 @@ config HID_PICOLCD_FB
default !EXPERT
depends on HID_PICOLCD
depends on HID_PICOLCD=FB || FB=y
-   select FB_DEFERRED_IO
-   select FB_SYS_FILLRECT
-   select FB_SYS_COPYAREA
-   select FB_SYS_IMAGEBLIT
-   select FB_SYS_FOPS
+   select FB_SYSMEM_HELPERS_DEFERRED
help
  Provide access to PicoLCD's 256x64 monochrome display via a
  framebuffer device.
diff --git a/drivers/hid/hid-picolcd_fb.c b/drivers/hid/hid-picolcd_fb.c
index d726aaafb146..a4dccdcda26f 100644
--- a/drivers/hid/hid-picolcd_fb.c
+++ b/drivers/hid/hid-picolcd_fb.c
@@ -283,54 +283,6 @@ static void picolcd_fb_update(struct fb_info *info)
mutex_unlock(&info->lock);
 }
 
-/* Stub to call the system default and update the image on the picoLCD */
-static void picolcd_fb_fillrect(struct fb_info *info,
-   const struct fb_fillrect *rect)
-{
-   if (!info->par)
-   return;
-   sys_fillrect(info, rect);
-
-   schedule_delayed_work(&info->deferred_work, 0);
-}
-
-/* Stub to call the system default and update the image on the picoLCD */
-static void picolcd_fb_copyarea(struct fb_info *info,
-   const struct fb_copyarea *area)
-{
-   if (!info->par)
-   return;
-   sys_copyarea(info, area);
-
-   schedule_delayed_work(&info->deferred_work, 0);
-}
-
-/* Stub to call the system default and update the image on the picoLCD */
-static void picolcd_fb_imageblit(struct fb_info *info, const struct fb_image 
*image)
-{
-   if (!info->par)
-   return;
-   sys_imageblit(info, image);
-
-   schedule_delayed_work(&info->deferred_work, 0);
-}
-
-/*
- * this is the slow path from userspace. they can seek and write to
- * the fb. it's inefficient to do anything less than a full screen draw
- */
-static ssize_t picolcd_fb_write(struct fb_info *info, const char __user *buf,
-   size_t count, loff_t *ppos)
-{
-   ssize_t ret;
-   if (!info->par)
-   return -ENODEV;
-   ret = fb_sys_write(info, buf, count, ppos);
-   if (ret >= 0)
-   schedule_delayed_work(&info->deferred_work, 0);
-   return ret;
-}
-
 static int picolcd_fb_blank(int blank, struct fb_info *info)
 {
/* We let fb notification do this for us via lcd/backlight device */
@@ -417,18 +369,31 @@ static int picolcd_set_par(struct fb_info *info)
return 0;
 }
 
+static void picolcdfb_ops_damage_range(struct fb_info *info, off_t off, size_t 
len)
+{
+   if (!info->par)
+   return;
+   schedule_delayed_work(&info->deferred_work, 0);
+}
+
+static void picolcdfb_ops_damage_area(struct fb_info *info, u32 x, u32 y, u32 
width, u32 height)
+{
+   if (!info->par)
+   return;
+   schedule_delayed_work(&info->deferred_work, 0);
+}
+
+FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(picolcdfb_ops,
+  picolcdfb_ops_damage_range,
+  picolcdfb_ops_damage_area)
+
 static const struct fb_ops picolcdfb_ops = {
.owner= THIS_MODULE,
+   FB_DEFAULT_DEFERRED_OPS(picolcdfb_ops),
.fb_destroy   = picolcd_fb_destroy,
-   .fb_read  = fb_sys_read,
-   .fb_write = picolcd_fb_write,
.fb_blank = picolcd_fb_blank,
-   .fb_fillrect  = picolcd_fb_fillrect,
-   .fb_copyarea  = picolcd_fb_copyarea,
-   .fb_imageblit = picolcd_fb_imageblit,
.fb_check_var = picolcd_fb_check_var,
.fb_set_par   = picolcd_set_par,
-   .fb_mmap  = fb_deferred_io_mmap,
 };
 
 
-- 
2.41.0