[media] saa7164: allow the encoder GOP structure to be configured

Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/saa7164/saa7164-api.c

@@ -24,6 +24,25 @@
 
 #include "saa7164.h"
 
+int saa7164_api_set_gop_size(struct saa7164_port *port)
+{
+	struct saa7164_dev *dev = port->dev;
+	tmComResEncVideoGopStructure_t gs;
+	int ret;
+
+	dprintk(DBGLVL_ENC, "%s()\n", __func__);
+
+	gs.ucRefFrameDist = SAA7164_ENCODER_DEFAULT_GOP_DIST;
+	gs.ucGOPSize = SAA7164_ENCODER_DEFAULT_GOP_SIZE;
+	ret = saa7164_cmd_send(port->dev, port->hwcfg.sourceid, SET_CUR,
+		EU_VIDEO_GOP_STRUCTURE_CONTROL,
+		sizeof(gs), &gs);
+	if (ret != SAA_OK)
+		printk(KERN_ERR "%s() error, ret = 0x%x\n", __func__, ret);
+
+	return ret;
+}
+
 int saa7164_api_set_encoder(struct saa7164_port *port)
 {
 	struct saa7164_dev *dev = port->dev;
@@ -31,7 +50,8 @@ int saa7164_api_set_encoder(struct saa7164_port *port)
 	tmComResEncAudioBitRate_t ab;
 	int ret;
 
-	dprintk(DBGLVL_ENC, "%s() unitid=0x%x\n", __func__, port->hwcfg.sourceid);
+	dprintk(DBGLVL_ENC, "%s() unitid=0x%x\n", __func__,
+		port->hwcfg.sourceid);
 
 	ret = saa7164_cmd_send(port->dev, port->hwcfg.sourceid, SET_CUR,
 		EU_PROFILE_CONTROL, sizeof(u8), &port->encoder_profile);
@@ -57,6 +77,7 @@ int saa7164_api_set_encoder(struct saa7164_port *port)
 		printk(KERN_ERR "%s() error, ret = 0x%x\n", __func__, ret);
 
 	saa7164_api_set_aspect_ratio(port);
+	saa7164_api_set_gop_size(port);
 
 	return ret;
 }

drivers/media/video/saa7164/saa7164-reg.h

@@ -205,6 +205,7 @@
 #define EU_PROFILE_CONTROL		0x00
 #define EU_VIDEO_FORMAT_CONTROL		0x01
 #define EU_VIDEO_BIT_RATE_CONTROL	0x02
+#define EU_VIDEO_GOP_STRUCTURE_CONTROL	0x04
 #define EU_VIDEO_INPUT_ASPECT_CONTROL	0x0A
 #define EU_AUDIO_FORMAT_CONTROL		0x0C
 #define EU_AUDIO_BIT_RATE_CONTROL	0x0D

drivers/media/video/saa7164/saa7164-types.h

@@ -325,6 +325,18 @@ typedef struct
 	u8	height;
 } __attribute__((packed)) tmComResEncVideoInputAspectRatio_t;
 
+/* Video Encoder GOP IBP message */
+/* 1. IPPPPPPPPPPPPPP */
+/* 2. IBPBPBPBPBPBPBP */
+/* 3. IBBPBBPBBPBBP   */
+#define SAA7164_ENCODER_DEFAULT_GOP_DIST ( 1)
+#define SAA7164_ENCODER_DEFAULT_GOP_SIZE (15)
+typedef struct
+{
+	u8	ucGOPSize;	/* GOP Size 12, 15 */
+	u8	ucRefFrameDist; /* Reference Frame Distance */
+} __attribute__((packed)) tmComResEncVideoGopStructure_t;
+
 /* Encoder processor definition */
 typedef struct
 {