Add support for two new panel properties, flip-vertical and
flip-horizontal. If set the display controller will be setup to
correctly flip the image.
Change-Id: I324b5d2b0b7ebbde7e08e5f32509cf101c057c84
Signed-off-by: Alban Bedel <alban.be...@avionic-design.de>
---
arch/arm/cpu/armv7/tegra20/display.c | 20 ++++++++++++++++++--
arch/arm/include/asm/arch-tegra20/display.h | 4 ++++
2 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/arch/arm/cpu/armv7/tegra20/display.c
b/arch/arm/cpu/armv7/tegra20/display.c
index fd77f3f..b332dd4 100644
--- a/arch/arm/cpu/armv7/tegra20/display.c
+++ b/arch/arm/cpu/armv7/tegra20/display.c
@@ -20,6 +20,7 @@ static void update_window(struct dc_ctlr *dc, struct
disp_ctl_win *win)
{
unsigned h_dda, v_dda;
unsigned long val;
+ unsigned x, y;
val = readl(&dc->cmd.disp_win_header);
val |= WINDOW_A_SELECT;
@@ -58,11 +59,22 @@ static void update_window(struct dc_ctlr *dc, struct
disp_ctl_win *win)
val = WIN_ENABLE;
if (win->bpp < 24)
val |= COLOR_EXPAND;
+ if (win->flip_h)
+ val |= H_DIRECTION;
+ if (win->flip_v)
+ val |= V_DIRECTION;
writel(val, &dc->win.win_opt);
+ x = win->x;
+ if (win->flip_h)
+ x += (win->w - 1) * (win->bpp / 8);
+ y = win->y;
+ if (win->flip_v)
+ y += win->h - 1;
+
writel((unsigned long)win->phys_addr, &dc->winbuf.start_addr);
- writel(win->x, &dc->winbuf.addr_h_offset);
- writel(win->y, &dc->winbuf.addr_v_offset);
+ writel(x, &dc->winbuf.addr_h_offset);
+ writel(y, &dc->winbuf.addr_v_offset);
writel(0xff00, &dc->win.blend_nokey);
writel(0xff00, &dc->win.blend_1win);
@@ -204,6 +216,8 @@ int setup_window(struct disp_ctl_win *win, struct
fdt_disp_config *config)
win->out_y = 0;
win->out_w = config->width;
win->out_h = config->height;
+ win->flip_h = config->flip_h;
+ win->flip_v = config->flip_v;
win->phys_addr = config->frame_buffer;
win->stride = config->width * (1 << config->log2_bpp) / 8;
debug("%s: depth = %d\n", __func__, config->log2_bpp);
@@ -258,6 +272,8 @@ static int tegra_decode_panel(const void *blob, int node,
config->width = fdtdec_get_int(blob, node, "xres", -1);
config->height = fdtdec_get_int(blob, node, "yres", -1);
+ config->flip_h = fdtdec_get_bool(blob, node, "flip-horizontal");
+ config->flip_v = fdtdec_get_bool(blob, node, "flip-vertical");
config->pixel_clock = fdtdec_get_int(blob, node, "clock", 0);
if (!config->pixel_clock || config->width == -1 ||
config->height == -1) {
diff --git a/arch/arm/include/asm/arch-tegra20/display.h
b/arch/arm/include/asm/arch-tegra20/display.h
index a04c84e..05c7bd5 100644
--- a/arch/arm/include/asm/arch-tegra20/display.h
+++ b/arch/arm/include/asm/arch-tegra20/display.h
@@ -25,6 +25,8 @@ struct disp_ctl_win {
unsigned out_y; /* Top edge of output window (row) */
unsigned out_w; /* Width of output window in pixels */
unsigned out_h; /* Height of output window in pixels */
+ unsigned flip_h; /* Horizontally flip the image */
+ unsigned flip_v; /* Vertically flip the image */
};
#define FDT_LCD_TIMINGS 4
@@ -53,6 +55,8 @@ struct fdt_disp_config {
int width; /* width in pixels */
int height; /* height in pixels */
int bpp; /* number of bits per pixel */
+ unsigned flip_h; /* Horizontally flip the image */
+ unsigned flip_v; /* Vertically flip the image */
/*
* log2 of number of bpp, in general, unless it bpp is 24 in which
--
2.1.1
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