[U-Boot] [PATCH 1/2] sunxi: Display: Add some comments about unimplemented LVDS features

[Priit Laes]

Following LVDS features might be supported (according to BSP), but are
unimplemented due to lack of proper hardware:
 - dual channel LVDS
 - choosing between NS or JEIDA mode
 - cross-polarity support

Add at least some comments about them.

Signed-off-by: Priit Laes <plaes at plaes.org>
---
 drivers/video/sunxi_display.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c
index 6f8ee01..bcd33dd 100644
--- a/drivers/video/sunxi_display.c
+++ b/drivers/video/sunxi_display.c
@@ -829,8 +829,20 @@ static void sunxi_lcdc_tcon0_mode_set(const struct ctfb_res_modes *mode,
 #endif
 #ifdef CONFIG_VIDEO_LCD_IF_LVDS
 	val = (sunxi_display.depth == 18) ? 1 : 0;
+	/*
+	 * TODO: LVDS features (from BSP, no hardware):
+	 * BIT(30) - LVDS single/dual channel (single - 0, dual - 1)
+	 * BIT(29) - 0
+	 * BIT(28) - 0
+	 * BIT(27) - LVDS mode (NS - 0, JEIDA - 1)
+	 * BIT(23) - 0
+	 */
 	writel(SUNXI_LCDC_TCON0_LVDS_INTF_BITWIDTH(val) |
 	       SUNXI_LCDC_TCON0_LVDS_CLK_SEL_TCON0, &lcdc->tcon0_lvds_intf);
+	/*
+	 * TODO: LVDS cross-polarity support (from BSP, no hardware):
+	 * set bits (0x1f << 21) | (0x1f << 5) for lvds_ana1 register
+	 */
 #endif
 
 	if (sunxi_display.depth == 18 || sunxi_display.depth == 16) {
-- 
2.9.3