sunxi: video: Add support for CSC and TVE to DE2 driver

Extend DE2 driver with support for TVE driver, which will be added in
next commit. TVE unit expects data to be in YUV format, so CSC support
is also added here.

Note that HDMI driver has higher priority, so TV out is not probed if
HDMI monitor is detected.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/include/asm/arch-sunxi/display2.h

@@ -90,6 +90,23 @@ struct de_ui {
 	u32 ovl_size;
 };
 
+struct de_csc {
+	u32 csc_ctl;
+	u8 res[0xc];
+	u32 coef11;
+	u32 coef12;
+	u32 coef13;
+	u32 coef14;
+	u32 coef21;
+	u32 coef22;
+	u32 coef23;
+	u32 coef24;
+	u32 coef31;
+	u32 coef32;
+	u32 coef33;
+	u32 coef34;
+};
+
 /*
  * DE register constants.
  */

drivers/video/sunxi/sunxi_de2.c

@@ -56,7 +56,7 @@ static void sunxi_de2_composer_init(void)
 }
 
 static void sunxi_de2_mode_set(int mux, const struct display_timing *mode,
-			       int bpp, ulong address)
+			       int bpp, ulong address, bool is_composite)
 {
 	ulong de_mux_base = (mux == 0) ?
 			    SUNXI_DE2_MUX0_BASE : SUNXI_DE2_MUX1_BASE;
@@ -72,6 +72,9 @@ static void sunxi_de2_mode_set(int mux, const struct display_timing *mode,
 		(struct de_ui *)(de_mux_base +
 				 SUNXI_DE2_MUX_CHAN_REGS +
 				 SUNXI_DE2_MUX_CHAN_SZ * 1);
+	struct de_csc * const de_csc_regs =
+		(struct de_csc *)(de_mux_base +
+				  SUNXI_DE2_MUX_DCSC_REGS);
 	u32 size = SUNXI_DE2_WH(mode->hactive.typ, mode->vactive.typ);
 	int channel;
 	u32 format;
@@ -128,7 +131,27 @@ static void sunxi_de2_mode_set(int mux, const struct display_timing *mode,
 	writel(0, de_mux_base + SUNXI_DE2_MUX_PEAK_REGS);
 	writel(0, de_mux_base + SUNXI_DE2_MUX_ASE_REGS);
 	writel(0, de_mux_base + SUNXI_DE2_MUX_FCC_REGS);
-	writel(0, de_mux_base + SUNXI_DE2_MUX_DCSC_REGS);
+
+	if (is_composite) {
+		/* set CSC coefficients */
+		writel(0x107, &de_csc_regs->coef11);
+		writel(0x204, &de_csc_regs->coef12);
+		writel(0x64, &de_csc_regs->coef13);
+		writel(0x4200, &de_csc_regs->coef14);
+		writel(0x1f68, &de_csc_regs->coef21);
+		writel(0x1ed6, &de_csc_regs->coef22);
+		writel(0x1c2, &de_csc_regs->coef23);
+		writel(0x20200, &de_csc_regs->coef24);
+		writel(0x1c2, &de_csc_regs->coef31);
+		writel(0x1e87, &de_csc_regs->coef32);
+		writel(0x1fb7, &de_csc_regs->coef33);
+		writel(0x20200, &de_csc_regs->coef34);
+
+		/* enable CSC unit */
+		writel(1, &de_csc_regs->csc_ctl);
+	} else {
+		writel(0, &de_csc_regs->csc_ctl);
+	}
 
 	switch (bpp) {
 	case 16:
@@ -153,7 +176,7 @@ static void sunxi_de2_mode_set(int mux, const struct display_timing *mode,
 
 static int sunxi_de2_init(struct udevice *dev, ulong fbbase,
 			  enum video_log2_bpp l2bpp,
-			  struct udevice *disp, int mux)
+			  struct udevice *disp, int mux, bool is_composite)
 {
 	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
 	struct display_timing timing;
@@ -183,7 +206,7 @@ static int sunxi_de2_init(struct udevice *dev, ulong fbbase,
 	}
 
 	sunxi_de2_composer_init();
-	sunxi_de2_mode_set(mux, &timing, 1 << l2bpp, fbbase);
+	sunxi_de2_mode_set(mux, &timing, 1 << l2bpp, fbbase, is_composite);
 
 	ret = display_enable(disp, 1 << l2bpp, &timing);
 	if (ret) {
@@ -204,7 +227,6 @@ static int sunxi_de2_probe(struct udevice *dev)
 	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
 	struct udevice *disp;
 	int ret;
-	int mux;
 
 	/* Before relocation we don't need to do anything */
 	if (!(gd->flags & GD_FLG_RELOC))
@@ -212,17 +234,31 @@ static int sunxi_de2_probe(struct udevice *dev)
 
 	ret = uclass_find_device_by_name(UCLASS_DISPLAY,
 					 "sunxi_dw_hdmi", &disp);
+	if (!ret) {
+		int mux;
+		if (IS_ENABLED(CONFIG_MACH_SUNXI_H3_H5))
+			mux = 0;
+		else
+			mux = 1;
+
+		ret = sunxi_de2_init(dev, plat->base, VIDEO_BPP32, disp, mux,
+				     false);
+		if (!ret) {
+			video_set_flush_dcache(dev, 1);
+			return 0;
+		}
+	}
+
+	debug("%s: hdmi display not found (ret=%d)\n", __func__, ret);
+
+	ret = uclass_find_device_by_name(UCLASS_DISPLAY,
+					"sunxi_tve", &disp);
 	if (ret) {
-		debug("%s: hdmi display not found (ret=%d)\n", __func__, ret);
+		debug("%s: tv not found (ret=%d)\n", __func__, ret);
 		return ret;
 	}
 
-	if (IS_ENABLED(CONFIG_MACH_SUNXI_H3_H5))
-		mux = 0;
-	else
-		mux = 1;
-
-	ret = sunxi_de2_init(dev, plat->base, VIDEO_BPP32, disp, mux);
+	ret = sunxi_de2_init(dev, plat->base, VIDEO_BPP32, disp, 1, true);
 	if (ret)
 		return ret;