[alsa-devel] [PATCH v3 08/15] drm: bridge/dw_hdmi: add audio support for more display resolutions

[Yakir Yang]

Add more n/cts values, in that case we can support audio for more
display resolutions (128 * SampleRate = PixelClock * N / CTS).

Signed-off-by: Yakir Yang <ykk at rock-chips.com>
---
Changes in v3: None
Changes in v2:
- add more n/cts combinations for more display resolutions

 drivers/gpu/drm/bridge/dw_hdmi.c | 58 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index b0b2605..1c0515f 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -244,8 +244,24 @@ static unsigned int hdmi_compute_n(unsigned int freq, unsigned long pixel_clk,
 	case 44100:
 		if (pixel_clk == 25170000)
 			n = 7007;
+		else if (pixel_clk == 25175000)
+			n = 28224;
+		else if (pixel_clk == 40000000)
+			n = 7056;
+		else if (pixel_clk == 54000000)
+			n = 6272;
+		else if (pixel_clk == 65000000)
+			n = 7056;
 		else if (pixel_clk == 74170000)
 			n = 17836;
+		else if (pixel_clk == 74250000)
+			n = 6272;
+		else if (pixel_clk == 83500000)
+			n = 7056;
+		else if (pixel_clk == 106500000)
+			n = 4074;
+		else if (pixel_clk == 108000000)
+			n = 4018;
 		else if (pixel_clk == 148350000)
 			n = (ratio == 150) ? 17836 : 8918;
 		else
@@ -255,10 +271,26 @@ static unsigned int hdmi_compute_n(unsigned int freq, unsigned long pixel_clk,
 	case 48000:
 		if (pixel_clk == 25170000)
 			n = (ratio == 150) ? 9152 : 6864;
+		else if (pixel_clk == 25175000)
+			n = 12288;
 		else if (pixel_clk == 27020000)
 			n = (ratio == 150) ? 8192 : 6144;
+		else if (pixel_clk == 40000000)
+			n = 6144;
+		else if (pixel_clk == 54000000)
+			n = 6144;
+		else if (pixel_clk == 65000000)
+			n = 6144;
 		else if (pixel_clk == 74170000)
 			n = 11648;
+		else if (pixel_clk == 74250000)
+			n = 6144;
+		else if (pixel_clk == 83500000)
+			n = 6144;
+		else if (pixel_clk == 106500000)
+			n = 6144;
+		else if (pixel_clk == 108000000)
+			n = 6144;
 		else if (pixel_clk == 148350000)
 			n = (ratio == 150) ? 11648 : 5824;
 		else
@@ -306,10 +338,18 @@ static unsigned int hdmi_compute_cts(unsigned int freq, unsigned long pixel_clk,
 	case 96000:
 	case 192000:
 		switch (pixel_clk) {
+		case 25175000:
+			cts = 50350;
+			break;
 		case 25200000:
 		case 27000000:
+		case 40000000:
 		case 54000000:
+		case 65000000:
 		case 74250000:
+		case 83500000:
+		case 106500000:
+		case 108000000:
 		case 148500000:
 			cts = pixel_clk / 1000;
 			break;
@@ -330,18 +370,36 @@ static unsigned int hdmi_compute_cts(unsigned int freq, unsigned long pixel_clk,
 	case 88200:
 	case 176400:
 		switch (pixel_clk) {
+		case 25175000:
+			cts = 125875;
+			break;
 		case 25200000:
 			cts = 28000;
 			break;
 		case 27000000:
 			cts = 30000;
 			break;
+		case 40000000:
+			cts = 50000;
+			break;
 		case 54000000:
 			cts = 60000;
 			break;
+		case 65000000:
+			cts = 81250;
+			break;
 		case 74250000:
 			cts = 82500;
 			break;
+		case 83500000:
+			cts = 104375;
+			break;
+		case 106500000:
+			cts = 88750;
+			break;
+		case 108000000:
+			cts = 76875;
+			break;
 		case 148500000:
 			cts = 165000;
 			break;
-- 
2.1.2