raspi/linux
1
0
Fork 1
mirror of https://github.com/raspberrypi/linux.git synced 2025-12-06 01:49:46 +00:00
Code Issues Projects Releases Wiki Activity

staging: fbtft: Add minipitft13 variant

Browse Source 
The Adafruit Mini-PiTFT13 display needs offsets applying when rotated,
so use the "variant" mechanism to select a custom set_addr_win method
using a dedicated compatible string of "fbtft,minipitft13".

See: https://github.com/raspberrypi/firmware/issues/1524

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
This commit is contained in:
Phil Elwell
2021-02-19 10:25:01 +00:00
committed by Dom Cobley
parent 01c8c6fbf8
commit fc38abbde3
1 changed files with 43 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
drivers/staging/fbtft/fb_st7789v.c
View File

@@ -75,6 +75,11 @@ enum st7789v_command {
static struct completion panel_te; /* completion for panel TE line */
static int irq_te; /* Linux IRQ for LCD TE line */
static u32 col_offset = 0;
static u32 row_offset = 0;
static u8 col_hack_fix_offset = 0;
static short x_offset = 0;
static short y_offset = 0;
static irqreturn_t panel_te_handler(int irq, void *data)
{
@@ -261,6 +266,22 @@ static int write_vmem(struct fbtft_par *par, size_t offset, size_t len)
return ret;
}
static void minipitft13_set_addr_win(struct fbtft_par *par, int xs, int ys,
int xe, int ye)
{
xs += x_offset;
xe += x_offset;
ys += y_offset;
ye += y_offset;
write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
}
/**
* set_var() - apply LCD properties like rotation and BGR mode
*
@@ -271,20 +292,32 @@ static int write_vmem(struct fbtft_par *par, size_t offset, size_t len)
static int set_var(struct fbtft_par *par)
{
u8 madctl_par = 0;
struct fbtft_display *display = &par->pdata->display;
u32 width = display->width;
u32 height = display->height;
if (par->bgr)
madctl_par |= MADCTL_BGR;
switch (par->info->var.rotate) {
case 0:
x_offset = 0;
y_offset = 0;
break;
case 90:
madctl_par |= (MADCTL_MV | MADCTL_MY);
x_offset = (320 - height) - row_offset;
y_offset = (240 - width) - col_offset;
break;
case 180:
madctl_par |= (MADCTL_MX | MADCTL_MY);
x_offset = (240 - width) - col_offset + col_hack_fix_offset;
// hack tweak to account for extra pixel width to make even
y_offset = (320 - height) - row_offset;
break;
case 270:
madctl_par |= (MADCTL_MV | MADCTL_MX);
x_offset = row_offset;
y_offset = col_offset;
break;
default:
return -EINVAL;
@@ -382,7 +415,16 @@ static struct fbtft_display display = {
},
};
FBTFT_REGISTER_DRIVER(DRVNAME, "sitronix,st7789v", &display);
static int variant_minipitft13(struct fbtft_display *display)
{
display->fbtftops.set_addr_win = minipitft13_set_addr_win;
return 0;
}
FBTFT_REGISTER_DRIVER_START(&display)
FBTFT_COMPATIBLE("sitronix,st7789v")
FBTFT_VARIANT_COMPATIBLE("fbtft,minipitft13", variant_minipitft13)
FBTFT_REGISTER_DRIVER_END(DRVNAME, &display);
MODULE_ALIAS("spi:" DRVNAME);
MODULE_ALIAS("platform:" DRVNAME);