V4L/DVB (4067): Fixed cx25840 to work with PAL/M

Sub-carrier frequency for PAL/M is slicely different than NTSC/M.
Without this patch, colors don't work on PAL/M.
Setting method also improved to allow other video standards to be included.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 112 insertions, 43 deletions

diff --git a/drivers/media/video/cx25840/cx25840-vbi.c b/drivers/media/video/cx25840/cx25840-vbi.c
index c124974c55b..6cc8bf215e8 100644
--- a/drivers/media/video/cx25840/cx25840-vbi.c
+++ b/drivers/media/video/cx25840/cx25840-vbi.c
@@ -86,61 +86,130 @@ void cx25840_vbi_setup(struct i2c_client *client)
 {
 	struct cx25840_state *state = i2c_get_clientdata(client);
 	v4l2_std_id std = cx25840_get_v4lstd(client);
+	int hblank,hactive,burst,vblank,vactive,sc,vblank656,src_decimation;
+	int luma_lpf,uv_lpf, comb;
+	u32 pll_int,pll_frac,pll_post;
 
+	/* datasheet startup, step 8d */
 	if (std & ~V4L2_STD_NTSC) {
-		/* datasheet startup, step 8d */
 		cx25840_write(client, 0x49f, 0x11);
+	} else {
+		cx25840_write(client, 0x49f, 0x14);
+	}
 
-		cx25840_write(client, 0x470, 0x84);
-		cx25840_write(client, 0x471, 0x00);
-		cx25840_write(client, 0x472, 0x2d);
-		cx25840_write(client, 0x473, 0x5d);
-
-		cx25840_write(client, 0x474, 0x24);
-		cx25840_write(client, 0x475, 0x40);
-		cx25840_write(client, 0x476, 0x24);
-		cx25840_write(client, 0x477, 0x28);
-
-		cx25840_write(client, 0x478, 0x1f);
-		cx25840_write(client, 0x479, 0x02);
+	if (std & V4L2_STD_625_50) {
+		hblank=0x084;
+		hactive=0x2d0;
+		burst=0x5d;
+		vblank=0x024;
+		vactive=0x244;
+		vblank656=0x28;
+		src_decimation=0x21f;
 
+		luma_lpf=2;
 		if (std & V4L2_STD_SECAM) {
-			cx25840_write(client, 0x47a, 0x80);
-			cx25840_write(client, 0x47b, 0x00);
-			cx25840_write(client, 0x47c, 0x5f);
-			cx25840_write(client, 0x47d, 0x42);
+			uv_lpf=0;
+			comb=0;
+			sc=0x0a425f;
 		} else {
-			cx25840_write(client, 0x47a, 0x90);
-			cx25840_write(client, 0x47b, 0x20);
-			cx25840_write(client, 0x47c, 0x63);
-			cx25840_write(client, 0x47d, 0x82);
+			uv_lpf=1;
+			comb=0x20;
+			sc=0x0a8263;
 		}
-
-		cx25840_write(client, 0x47e, 0x0a);
-		cx25840_write(client, 0x47f, 0x01);
-		state->vbi_line_offset = 5;
 	} else {
-		/* datasheet startup, step 8d */
-		cx25840_write(client, 0x49f, 0x14);
+		hactive=720;
+		hblank=122;
+		vactive=487;
+		luma_lpf=1;
+		uv_lpf=1;
+
+		src_decimation=0x21f;
+		if (std == V4L2_STD_PAL_M) {
+			vblank=20;
+			vblank656=24;
+			burst=0x61;
+			comb=0x20;
+
+			sc=555452;
+		} else {
+			vblank=26;
+			vblank656=26;
+			burst=0x5b;
+			comb=0x66;
+			sc=556063;
+		}
+	}
+
+	/* DEBUG: Displays configured PLL frequency */
+	pll_int=cx25840_read(client, 0x108);
+	pll_frac=cx25840_read4(client, 0x10c)&0x1ffffff;
+	pll_post=cx25840_read(client, 0x109);
+	v4l_dbg(1, cx25840_debug, client,
+				"PLL regs = int: %u, frac: %u, post: %u\n",
+				pll_int,pll_frac,pll_post);
+
+	if (pll_post) {
+		int fin, fsc;
+		int pll= (28636363L*((((u64)pll_int)<<25L)+pll_frac)) >>25L;
+
+		pll/=pll_post;
+		v4l_dbg(1, cx25840_debug, client, "PLL = %d.%06d MHz\n",
+						pll/1000000, pll%1000000);
+		v4l_dbg(1, cx25840_debug, client, "PLL/8 = %d.%06d MHz\n",
+						pll/8000000, (pll/8)%1000000);
+
+		fin=((u64)src_decimation*pll)>>12;
+		v4l_dbg(1, cx25840_debug, client, "ADC Sampling freq = "
+						"%d.%06d MHz\n",
+						fin/1000000,fin%1000000);
+
+		fsc= (((u64)sc)*pll) >> 24L;
+		v4l_dbg(1, cx25840_debug, client, "Chroma sub-carrier freq = "
+						"%d.%06d MHz\n",
+						fsc/1000000,fsc%1000000);
+
+		v4l_dbg(1, cx25840_debug, client, "hblank %i, hactive %i, "
+			"vblank %i , vactive %i, vblank656 %i, src_dec %i,"
+			"burst 0x%02x, luma_lpf %i, uv_lpf %i, comb 0x%02x,"
+			" sc 0x%06x\n",
+			hblank, hactive, vblank, vactive, vblank656,
+			src_decimation, burst, luma_lpf, uv_lpf, comb, sc);
+	}
+
+	/* Sets horizontal blanking delay and active lines */
+	cx25840_write(client, 0x470, hblank);
+	cx25840_write(client, 0x471, 0xff&(((hblank>>8)&0x3)|(hactive <<4)));
+	cx25840_write(client, 0x472, hactive>>4);
+
+	/* Sets burst gate delay */
+	cx25840_write(client, 0x473, burst);
 
-		cx25840_write(client, 0x470, 0x7a);
-		cx25840_write(client, 0x471, 0x00);
-		cx25840_write(client, 0x472, 0x2d);
-		cx25840_write(client, 0x473, 0x5b);
+	/* Sets vertical blanking delay and active duration */
+	cx25840_write(client, 0x474, vblank);
+	cx25840_write(client, 0x475, 0xff&(((vblank>>8)&0x3)|(vactive <<4)));
+	cx25840_write(client, 0x476, vactive>>4);
+	cx25840_write(client, 0x477, vblank656);
 
-		cx25840_write(client, 0x474, 0x1a);
-		cx25840_write(client, 0x475, 0x70);
-		cx25840_write(client, 0x476, 0x1e);
-		cx25840_write(client, 0x477, 0x1e);
+	/* Sets src decimation rate */
+	cx25840_write(client, 0x478, 0xff&src_decimation);
+	cx25840_write(client, 0x479, 0xff&(src_decimation>>8));
 
-		cx25840_write(client, 0x478, 0x1f);
-		cx25840_write(client, 0x479, 0x02);
-		cx25840_write(client, 0x47a, 0x50);
-		cx25840_write(client, 0x47b, 0x66);
+	/* Sets Luma and UV Low pass filters */
+	cx25840_write(client, 0x47a, luma_lpf<<6|((uv_lpf<<4)&0x30));
 
-		cx25840_write(client, 0x47c, 0x1f);
-		cx25840_write(client, 0x47d, 0x7c);
-		cx25840_write(client, 0x47e, 0x08);
+	/* Enables comb filters */
+	cx25840_write(client, 0x47b, comb);
+
+	/* Sets SC Step*/
+	cx25840_write(client, 0x47c, sc);
+	cx25840_write(client, 0x47d, 0xff&sc>>8);
+	cx25840_write(client, 0x47e, 0xff&sc>>16);
+
+	/* Sets VBI parameters */
+	if (std & V4L2_STD_625_50) {
+		cx25840_write(client, 0x47f, 0x01);
+		state->vbi_line_offset = 5;
+	} else {
 		cx25840_write(client, 0x47f, 0x00);
 		state->vbi_line_offset = 8;
 	}
@@ -186,7 +255,7 @@ int cx25840_vbi(struct i2c_client *client, unsigned int cmd, void *arg)
 
 	case VIDIOC_S_FMT:
 	{
-		int is_pal = !(cx25840_get_v4lstd(client) & V4L2_STD_NTSC);
+		int is_pal = !(cx25840_get_v4lstd(client) & V4L2_STD_525_60);
 		int vbi_offset = is_pal ? 1 : 0;
 		int i, x;
 		u8 lcr[24];