diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.10/950-0517-staging-fbtft-Add-minipitft13-variant.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.10/950-0517-staging-fbtft-Add-minipitft13-variant.patch | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.10/950-0517-staging-fbtft-Add-minipitft13-variant.patch b/target/linux/bcm27xx/patches-5.10/950-0517-staging-fbtft-Add-minipitft13-variant.patch new file mode 100644 index 0000000000..26419b40c7 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.10/950-0517-staging-fbtft-Add-minipitft13-variant.patch @@ -0,0 +1,105 @@ +From b279b2516d9fc40cc491b142fbf453f9533f6e4f Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.com> +Date: Fri, 19 Feb 2021 10:25:01 +0000 +Subject: [PATCH] staging: fbtft: Add minipitft13 variant + +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> +--- + drivers/staging/fbtft/fb_st7789v.c | 45 +++++++++++++++++++++++++++++- + 1 file changed, 44 insertions(+), 1 deletion(-) + +--- a/drivers/staging/fbtft/fb_st7789v.c ++++ b/drivers/staging/fbtft/fb_st7789v.c +@@ -66,6 +66,12 @@ enum st7789v_command { + #define MADCTL_MX BIT(6) /* bitmask for column address order */ + #define MADCTL_MY BIT(7) /* bitmask for page address order */ + ++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; ++ + /** + * init_display() - initialize the display controller + * +@@ -145,6 +151,22 @@ static int init_display(struct fbtft_par + return 0; + } + ++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 + * +@@ -155,20 +177,32 @@ static int init_display(struct fbtft_par + 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; +@@ -265,7 +299,16 @@ static struct fbtft_display display = { + }, + }; + +-FBTFT_REGISTER_DRIVER(DRVNAME, "sitronix,st7789v", &display); ++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); |