diff options
| author | Svyatoslav Ryhel | 2023-03-27 11:11:45 +0300 |
|---|---|---|
| committer | Anatolij Gustschin | 2023-04-07 19:46:24 +0200 |
| commit | 8076cc51fb6948da0aba187415183a243302cfff (patch) | |
| tree | 81d6b73add3490b39d20ddd466c82f05b8330e9e /drivers/video | |
| parent | 098dbcb7ca3eca6c4ed72db90f2ecae06370e8ef (diff) | |
video: tegra-dc: add 180 degree panel rotation
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>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/tegra20/tegra-dc.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/video/tegra20/tegra-dc.c b/drivers/video/tegra20/tegra-dc.c index e004ee362f6..e2796509227 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", |