diff options
| author | Marcus Folkesson <marcus.folkesson@gmail.com> | 2025-07-21 12:43:34 +0200 |
|---|---|---|
| committer | Javier Martinez Canillas <javierm@redhat.com> | 2025-09-01 15:26:44 +0200 |
| commit | e61c35157d32b4b422f0a4cbc3c40d04d883a9c9 (patch) | |
| tree | 99d5b1e874e287f4282a3cf7c1dc2950b3cd4dee | |
| parent | c68f78ae1d86a5eb9632b72f7b4f15912bff5b0f (diff) | |
drm/st7571-i2c: add support for inverted pixel format
Depending on which display that is connected to the controller, an
"1" means either a black or a white pixel.
The supported formats (R1/R2/XRGB8888) expects the pixels
to map against (4bit):
00 => Black
01 => Dark Gray
10 => Light Gray
11 => White
If this is not what the display map against, make it possible to invert
the pixels.
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Link: https://lore.kernel.org/r/20250721-st7571-format-v2-4-159f4134098c@gmail.com
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/sitronix/st7571-i2c.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/gpu/drm/sitronix/st7571-i2c.c b/drivers/gpu/drm/sitronix/st7571-i2c.c index 6f8142943428..807bea62d96e 100644 --- a/drivers/gpu/drm/sitronix/st7571-i2c.c +++ b/drivers/gpu/drm/sitronix/st7571-i2c.c @@ -151,6 +151,7 @@ struct st7571_device { bool ignore_nak; bool grayscale; + bool inverted; u32 height_mm; u32 width_mm; u32 startline; @@ -792,6 +793,7 @@ static int st7567_parse_dt(struct st7571_device *st7567) of_property_read_u32(np, "width-mm", &st7567->width_mm); of_property_read_u32(np, "height-mm", &st7567->height_mm); + st7567->inverted = of_property_read_bool(np, "sitronix,inverted"); st7567->pformat = &st7571_monochrome; st7567->bpp = 1; @@ -819,6 +821,7 @@ static int st7571_parse_dt(struct st7571_device *st7571) of_property_read_u32(np, "width-mm", &st7571->width_mm); of_property_read_u32(np, "height-mm", &st7571->height_mm); st7571->grayscale = of_property_read_bool(np, "sitronix,grayscale"); + st7571->inverted = of_property_read_bool(np, "sitronix,inverted"); if (st7571->grayscale) { st7571->pformat = &st7571_grayscale; @@ -873,7 +876,7 @@ static int st7567_lcd_init(struct st7571_device *st7567) ST7571_SET_POWER(0x6), /* Power Control, VC: ON, VR: ON, VF: OFF */ ST7571_SET_POWER(0x7), /* Power Control, VC: ON, VR: ON, VF: ON */ - ST7571_SET_REVERSE(0), + ST7571_SET_REVERSE(st7567->inverted ? 1 : 0), ST7571_SET_ENTIRE_DISPLAY_ON(0), }; @@ -917,7 +920,7 @@ static int st7571_lcd_init(struct st7571_device *st7571) ST7571_SET_COLOR_MODE(st7571->pformat->mode), ST7571_COMMAND_SET_NORMAL, - ST7571_SET_REVERSE(0), + ST7571_SET_REVERSE(st7571->inverted ? 1 : 0), ST7571_SET_ENTIRE_DISPLAY_ON(0), }; |