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| author | Linus Walleij <linus.walleij@linaro.org> | 2016-06-16 11:36:15 +0200 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2016-08-11 17:54:53 +0300 |
| commit | 03d14c36af98dd2191c2e35b5ed55ff93b59d345 (patch) | |
| tree | 80ce9c2dac706da03271214a645b0c04e10111cb /include/linux/amba/clcd.h | |
| parent | af29897f1046d7c1ab86b57506fbfdcfba569de8 (diff) | |
| download | linux-03d14c36af98dd2191c2e35b5ed55ff93b59d345.tar.gz linux-03d14c36af98dd2191c2e35b5ed55ff93b59d345.tar.bz2 linux-03d14c36af98dd2191c2e35b5ed55ff93b59d345.zip | |
video: ARM CLCD: support pads connected in reverse order
There are CLCDs connected with the pads in BGR rather than RGB
order. It really doesn't matter since the CLCD has a flag and
a bit to switch the position of the RGB and BGR components.
This is needed to put something logical into the
arm,pl11x,tft-r0g0b0-pads property of the device tree on the
Nomadik which will then be <16 8 0>.
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'include/linux/amba/clcd.h')
| -rw-r--r-- | include/linux/amba/clcd.h | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/include/linux/amba/clcd.h b/include/linux/amba/clcd.h index e64c1ccebb76..8b64ec0d574b 100644 --- a/include/linux/amba/clcd.h +++ b/include/linux/amba/clcd.h @@ -108,6 +108,12 @@ struct clcd_panel { grayscale:1; unsigned int connector; struct backlight_device *backlight; + /* + * If the B/R lines are switched between the CLCD + * and the panel we need to know this and not try to + * compensate with the BGR bit in the control register. + */ + bool bgr_connection; }; struct clcd_regs { @@ -234,16 +240,22 @@ static inline void clcdfb_decode(struct clcd_fb *fb, struct clcd_regs *regs) if (var->grayscale) val |= CNTL_LCDBW; - if (fb->panel->caps && fb->board->caps && - var->bits_per_pixel >= 16) { + if (fb->panel->caps && fb->board->caps && var->bits_per_pixel >= 16) { /* * if board and panel supply capabilities, we can support - * changing BGR/RGB depending on supplied parameters + * changing BGR/RGB depending on supplied parameters. Here + * we switch to what the framebuffer is providing if need + * be, so if the framebuffer is BGR but the display connection + * is RGB (first case) we switch it around. Vice versa mutatis + * mutandis if the framebuffer is RGB but the display connection + * is BGR, we flip it around. */ if (var->red.offset == 0) val &= ~CNTL_BGR; else val |= CNTL_BGR; + if (fb->panel->bgr_connection) + val ^= CNTL_BGR; } switch (var->bits_per_pixel) { |