Unlike 90 and 270 degree rotation, 180 degree rotation is more common and does not require scaling. Implement it for correct grouper support.
Tested-by: Andreas Westman Dorcsak hedmoo@yahoo.com # Google Nexus 7 2012 Tested-by: Svyatoslav Ryhel clamor95@gmail.com # Google Nexus 7 2012 Signed-off-by: Svyatoslav Ryhel clamor95@gmail.com --- drivers/video/tegra20/tegra-dc.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-)
diff --git a/drivers/video/tegra20/tegra-dc.c b/drivers/video/tegra20/tegra-dc.c index e004ee362f..e279650922 100644 --- a/drivers/video/tegra20/tegra-dc.c +++ b/drivers/video/tegra20/tegra-dc.c @@ -37,6 +37,7 @@ struct tegra_lcd_priv { fdt_addr_t frame_buffer; /* Address of frame buffer */ unsigned pixel_clock; /* Pixel clock in Hz */ int dc_clk[2]; /* Contains clk and its parent */ + bool rotation; /* 180 degree panel turn */ };
enum { @@ -46,8 +47,10 @@ enum { LCD_MAX_LOG2_BPP = VIDEO_BPP16, };
-static void update_window(struct dc_ctlr *dc, struct disp_ctl_win *win) +static void update_window(struct tegra_lcd_priv *priv, + struct disp_ctl_win *win) { + struct dc_ctlr *dc = priv->dc; unsigned h_dda, v_dda; unsigned long val;
@@ -88,6 +91,10 @@ static void update_window(struct dc_ctlr *dc, struct disp_ctl_win *win) val = WIN_ENABLE; if (win->bpp < 24) val |= COLOR_EXPAND; + + if (priv->rotation) + val |= H_DIRECTION | V_DIRECTION; + writel(val, &dc->win.win_opt);
writel((unsigned long)win->phys_addr, &dc->winbuf.start_addr); @@ -224,8 +231,14 @@ static void rgb_enable(struct dc_com_reg *com) static int setup_window(struct disp_ctl_win *win, struct tegra_lcd_priv *priv) { - win->x = 0; - win->y = 0; + if (priv->rotation) { + win->x = priv->width * 2; + win->y = priv->height; + } else { + win->x = 0; + win->y = 0; + } + win->w = priv->width; win->h = priv->height; win->out_x = 0; @@ -298,7 +311,7 @@ static int tegra_display_probe(const void *blob, struct tegra_lcd_priv *priv, if (setup_window(&window, priv)) return -1;
- update_window(priv->dc, &window); + update_window(priv, &window);
return 0; } @@ -370,6 +383,8 @@ static int tegra_lcd_of_to_plat(struct udevice *dev) return -EINVAL; }
+ priv->rotation = dev_read_bool(dev, "nvidia,180-rotation"); + rgb = fdt_subnode_offset(blob, node, "rgb"); if (rgb < 0) { debug("%s: Cannot find rgb subnode for '%s' (ret=%d)\n",