Simplify rules for writting secondary output drivers to matroxfb.

Update some initializations to use C99 initializers.

drivers/video/matrox/matroxfb_DAC1064.c

@@ -504,37 +504,8 @@ static int m1064_compute(void* outdev, struct my_timming* m) {
 	return 0;
 }
 
-static int m1064_program(void* outdev) {
-	/* nothing, hardware is set in m1064_compute */
-	return 0;
-}
-
-static int m1064_start(void* outdev) {
-	/* nothing */
-	return 0;
-}
-
-static void m1064_incuse(void* outdev) {
-	/* nothing yet; MODULE_INC_USE in future... */
-}
-
-static void m1064_decuse(void* outdev) {
-	/* nothing yet; MODULE_DEC_USE in future... */
-}
-
-static int m1064_setmode(void* outdev, u_int32_t mode) {
-	if (mode != MATROXFB_OUTPUT_MODE_MONITOR)
-		return -EINVAL;
-	return 0;
-}
-
 static struct matrox_altout m1064 = {
-	m1064_compute,
-	m1064_program,
-	m1064_start,
-	m1064_incuse,
-	m1064_decuse,
-	m1064_setmode
+	.compute	= m1064_compute,
 };
 
 #endif /* NEED_DAC1064 */

drivers/video/matrox/matroxfb_base.c

@@ -825,34 +825,34 @@ static int matroxfb_set_var(struct fb_var_screeninfo *var, int con,
 			hw->CRTCEXT[0] = (hw->CRTCEXT[0] & 0xF0) | ((pos >> 16) & 0x0F) | ((pos >> 14) & 0x40);
 			hw->CRTCEXT[8] = pos >> 21;
 			if (ACCESS_FBINFO(output.ph) & (MATROXFB_OUTPUT_CONN_PRIMARY | MATROXFB_OUTPUT_CONN_DFP)) {
-				if (ACCESS_FBINFO(primout))
+				if (ACCESS_FBINFO(primout) && ACCESS_FBINFO(primout)->compute)
 					ACCESS_FBINFO(primout)->compute(MINFO, &mt);
 			}
 			if (ACCESS_FBINFO(output.ph) & MATROXFB_OUTPUT_CONN_SECONDARY) {
 				down_read(&ACCESS_FBINFO(altout.lock));
-				if (ACCESS_FBINFO(altout.output))
+				if (ACCESS_FBINFO(altout.output) && ACCESS_FBINFO(altout.output)->compute)
 					ACCESS_FBINFO(altout.output)->compute(ACCESS_FBINFO(altout.device), &mt);
 				up_read(&ACCESS_FBINFO(altout.lock));
 			}
 			ACCESS_FBINFO(hw_switch->restore(PMINFO display));
 			if (ACCESS_FBINFO(output.ph) & (MATROXFB_OUTPUT_CONN_PRIMARY | MATROXFB_OUTPUT_CONN_DFP)) {
-				if (ACCESS_FBINFO(primout))
+				if (ACCESS_FBINFO(primout) && ACCESS_FBINFO(primout)->program)
 					ACCESS_FBINFO(primout)->program(MINFO);
 			}
 			if (ACCESS_FBINFO(output.ph) & MATROXFB_OUTPUT_CONN_SECONDARY) {
 				down_read(&ACCESS_FBINFO(altout.lock));
-				if (ACCESS_FBINFO(altout.output))
+				if (ACCESS_FBINFO(altout.output) && ACCESS_FBINFO(altout.output)->program)
 					ACCESS_FBINFO(altout.output)->program(ACCESS_FBINFO(altout.device));
 				up_read(&ACCESS_FBINFO(altout.lock));
 			}
 			ACCESS_FBINFO(cursor.redraw) = 1;
 			if (ACCESS_FBINFO(output.ph) & (MATROXFB_OUTPUT_CONN_PRIMARY | MATROXFB_OUTPUT_CONN_DFP)) {
-				if (ACCESS_FBINFO(primout))
+				if (ACCESS_FBINFO(primout) && ACCESS_FBINFO(primout)->start)
 					ACCESS_FBINFO(primout)->start(MINFO);
 			}
 			if (ACCESS_FBINFO(output.ph) & MATROXFB_OUTPUT_CONN_SECONDARY) {
 				down_read(&ACCESS_FBINFO(altout.lock));
-				if (ACCESS_FBINFO(altout.output))
+				if (ACCESS_FBINFO(altout.output) && ACCESS_FBINFO(altout.output)->start)
 					ACCESS_FBINFO(altout.output)->start(ACCESS_FBINFO(altout.device));
 				up_read(&ACCESS_FBINFO(altout.lock));
 			}
@@ -1006,11 +1006,21 @@ static int matroxfb_ioctl(struct inode *inode, struct file *file,
 					case MATROXFB_OUTPUT_SECONDARY:
 						val = -EINVAL;
 						down_read(&ACCESS_FBINFO(altout.lock));
-						if (ACCESS_FBINFO(altout.output) && ACCESS_FBINFO(altout.device))
-							val = ACCESS_FBINFO(altout.output)->setmode(ACCESS_FBINFO(altout.device), mom.mode);
+						if (ACCESS_FBINFO(altout.output) && ACCESS_FBINFO(altout.device)) {
+							if (ACCESS_FBINFO(altout.output)->verifymode) {
+								val = ACCESS_FBINFO(altout.output)->verifymode(ACCESS_FBINFO(altout.device), mom.mode);
+							} else {
+								if (mom.mode == MATROXFB_OUTPUT_MODE_MONITOR) {
+									val = 0;
+								}
+							}
+						}
 						up_read(&ACCESS_FBINFO(altout.lock));
-						if (val != 1)
+						if (val != 0)
 							return val;
+						if (ACCESS_FBINFO(altout.mode) == mom.mode)
+							return 0;
+						ACCESS_FBINFO(altout.mode) = mom.mode;
 						if (ACCESS_FBINFO(output.ph) & MATROXFB_OUTPUT_CONN_SECONDARY)
 							matroxfb_switch(ACCESS_FBINFO(fbcon.currcon), info);
 						if (ACCESS_FBINFO(output.sh) & MATROXFB_OUTPUT_CONN_SECONDARY) {
@@ -1051,8 +1061,10 @@ static int matroxfb_ioctl(struct inode *inode, struct file *file,
 					case MATROXFB_OUTPUT_SECONDARY:
 						val = -EINVAL;
 						down_read(&ACCESS_FBINFO(altout.lock));
-						if (ACCESS_FBINFO(altout.output) && ACCESS_FBINFO(altout.device))
-							val = ACCESS_FBINFO(altout.output)->getmode(ACCESS_FBINFO(altout.device), &mom.mode);
+						if (ACCESS_FBINFO(altout.output) && ACCESS_FBINFO(altout.device)) {
+							mom.mode = ACCESS_FBINFO(altout.mode);
+							val = 0;
+						}
 						up_read(&ACCESS_FBINFO(altout.lock));
 						if (val)
 							return val;

drivers/video/matrox/matroxfb_base.h

@@ -399,10 +399,7 @@ struct matrox_altout {
 	int		(*compute)(void* altout_dev, struct my_timming* input);
 	int		(*program)(void* altout_dev);
 	int		(*start)(void* altout_dev);
-	void		(*incuse)(void* altout_dev);
-	void		(*decuse)(void* altout_dev);
-	int		(*setmode)(void* altout_dev, u_int32_t mode);
-	int		(*getmode)(void* altout_dev, u_int32_t* mode);
+	int		(*verifymode)(void* altout_dev, u_int32_t mode);
 };
 
 enum mga_chip { MGA_2064, MGA_2164, MGA_1064, MGA_1164, MGA_G100, MGA_G200, MGA_G400, MGA_G450, MGA_G550 };
@@ -452,6 +449,7 @@ struct matrox_fb_info {
 	struct matrox_altout*	output;
 	void*			device;
 	struct rw_semaphore	lock;
+	unsigned int		mode;
 			      } altout;
 
 #define MATROXFB_MAX_FB_DRIVERS		5

drivers/video/matrox/matroxfb_crtc2.c

@@ -420,34 +420,34 @@ static int matroxfb_dh_set_var(struct fb_var_screeninfo* var, int con,
 		pos += m2info->video.offbase;
 		DAC1064_global_init(PMINFO2);
 		if (ACCESS_FBINFO(output.sh) & MATROXFB_OUTPUT_CONN_PRIMARY) {
-			if (ACCESS_FBINFO(primout))
+			if (ACCESS_FBINFO(primout) && ACCESS_FBINFO(primout)->compute)
 				ACCESS_FBINFO(primout)->compute(MINFO, &mt);
 		}
 		if (ACCESS_FBINFO(output.sh) & MATROXFB_OUTPUT_CONN_SECONDARY) {
 			down_read(&ACCESS_FBINFO(altout.lock));
-			if (ACCESS_FBINFO(altout.output))
+			if (ACCESS_FBINFO(altout.output) && ACCESS_FBINFO(altout.output)->compute)
 				ACCESS_FBINFO(altout.output)->compute(ACCESS_FBINFO(altout.device), &mt);
 			up_read(&ACCESS_FBINFO(altout.lock));
 		}
 		matroxfb_dh_restore(m2info, &mt, p, mode, pos);
 		DAC1064_global_restore(PMINFO2);
 		if (ACCESS_FBINFO(output.sh) & MATROXFB_OUTPUT_CONN_PRIMARY) {
-			if (ACCESS_FBINFO(primout))
+			if (ACCESS_FBINFO(primout) && ACCESS_FBINFO(primout)->program)
 				ACCESS_FBINFO(primout)->program(MINFO);
 		}
 		if (ACCESS_FBINFO(output.sh) & MATROXFB_OUTPUT_CONN_SECONDARY) {
 			down_read(&ACCESS_FBINFO(altout.lock));
-			if (ACCESS_FBINFO(altout.output))
+			if (ACCESS_FBINFO(altout.output) && ACCESS_FBINFO(altout.output)->program)
 				ACCESS_FBINFO(altout.output)->program(ACCESS_FBINFO(altout.device));
 			up_read(&ACCESS_FBINFO(altout.lock));
 		}
 		if (ACCESS_FBINFO(output.sh) & MATROXFB_OUTPUT_CONN_PRIMARY) {
-			if (ACCESS_FBINFO(primout))
+			if (ACCESS_FBINFO(primout) && ACCESS_FBINFO(primout)->start)
 				ACCESS_FBINFO(primout)->start(MINFO);
 		}
 		if (ACCESS_FBINFO(output.sh) & MATROXFB_OUTPUT_CONN_SECONDARY) {
 			down_read(&ACCESS_FBINFO(altout.lock));
-			if (ACCESS_FBINFO(altout.output))
+			if (ACCESS_FBINFO(altout.output) && ACCESS_FBINFO(altout.output)->start)
 				ACCESS_FBINFO(altout.output)->start(ACCESS_FBINFO(altout.device));
 			up_read(&ACCESS_FBINFO(altout.lock));
 		}

drivers/video/matrox/matroxfb_g450.c

@@ -33,38 +33,9 @@ static int matroxfb_g450_program(void* md) {
 	return 0;
 }
 
-static int matroxfb_g450_start(void* md) {
-	return 0;
-}
-
-static void matroxfb_g450_incuse(void* md) {
-	MOD_INC_USE_COUNT;
-}
-
-static void matroxfb_g450_decuse(void* md) {
-	MOD_DEC_USE_COUNT;
-}
-
-static int matroxfb_g450_set_mode(void* md, u_int32_t arg) {
-	if (arg == MATROXFB_OUTPUT_MODE_MONITOR) {
-		return 1;
-	}
-	return -EINVAL;
-}
-
-static int matroxfb_g450_get_mode(void* md, u_int32_t* arg) {
-	*arg = MATROXFB_OUTPUT_MODE_MONITOR;
-	return 0;
-}
-
 static struct matrox_altout matroxfb_g450_altout = {
-	matroxfb_g450_compute,
-	matroxfb_g450_program,
-	matroxfb_g450_start,
-	matroxfb_g450_incuse,
-	matroxfb_g450_decuse,
-	matroxfb_g450_set_mode,
-	matroxfb_g450_get_mode
+	.compute	= matroxfb_g450_compute,
+	.program	= matroxfb_g450_program,
 };
 
 void matroxfb_g450_connect(WPMINFO2) {

drivers/video/matrox/matroxfb_maven.c

@@ -33,7 +33,6 @@
 struct maven_data {
 	struct matrox_fb_info*		primary_head;
 	struct i2c_client*		client;
-	int				mode;
 	int				version;
 };
 
@@ -326,8 +325,9 @@ static void maven_init_TVdata(const struct maven_data* md, struct mavenregs* dat
 		0x00,	/* 3E written multiple times */
 		0x00,	/* never written */
 	}, MODE_NTSC, 525, 60 };
+	MINFO_FROM(md->primary_head);
 	
-	if (md->mode & MODE_PAL)
+	if (ACCESS_FBINFO(altout.mode) == MODE_PAL)
 		*data = palregs;
 	else
 		*data = ntscregs;
@@ -583,9 +583,10 @@ static inline int maven_compute_timming(struct maven_data* md,
 		struct mavenregs* m) {
 	unsigned int tmpi;
 	unsigned int a, bv, c;
+	MINFO_FROM(md->primary_head);
 
-	m->mode = md->mode;
-	if (MODE_TV(md->mode)) {
+	m->mode = ACCESS_FBINFO(altout.mode);
+	if (MODE_TV(m->mode)) {
 		unsigned int lmargin;
 		unsigned int umargin;
 		unsigned int vslen;
@@ -855,22 +856,16 @@ static inline int maven_resync(struct maven_data* md) {
 	return 0;
 }
 
-static int maven_set_output_mode(struct maven_data* md, u_int32_t arg) {
+static int maven_verify_output_mode(struct maven_data* md, u_int32_t arg) {
 	switch (arg) {
 		case MATROXFB_OUTPUT_MODE_PAL:
 		case MATROXFB_OUTPUT_MODE_NTSC:
 		case MATROXFB_OUTPUT_MODE_MONITOR:
-			md->mode = arg;
-			return 1;
+			return 0;
 	}
 	return -EINVAL;
 }
 
-static int maven_get_output_mode(struct maven_data* md, u_int32_t *arg) {
-	*arg = md->mode;
-	return 0;
-}
-
 /******************************************************/
 
 static int maven_out_compute(void* md, struct my_timming* mt) {
@@ -893,32 +888,15 @@ static int maven_out_start(void* md) {
 	return maven_resync(md);
 }
 
-static void maven_out_incuse(void* md) {
-	if (md)
-		i2c_inc_use_client(((struct maven_data*)md)->client);
-}
-
-static void maven_out_decuse(void* md) {
-	if (md)
-		i2c_dec_use_client(((struct maven_data*)md)->client);
-}
-
-static int maven_out_set_mode(void* md, u_int32_t arg) {
-	return maven_set_output_mode(md, arg);
-}
-
-static int maven_out_get_mode(void* md, u_int32_t* arg) {
-	return maven_get_output_mode(md, arg);
+static int maven_out_verify_mode(void* md, u_int32_t arg) {
+	return maven_verify_output_mode(md, arg);
 }
 
 static struct matrox_altout maven_altout = {
-	maven_out_compute,
-	maven_out_program,
-	maven_out_start,
-	maven_out_incuse,
-	maven_out_decuse,
-	maven_out_set_mode,
-	maven_out_get_mode
+	.compute	= maven_out_compute,
+	.program	= maven_out_program,
+	.start		= maven_out_start,
+	.verifymode	= maven_out_verify_mode,
 };
 
 static int maven_init_client(struct i2c_client* clnt) {
@@ -926,7 +904,7 @@ static int maven_init_client(struct i2c_client* clnt) {
 	struct maven_data* md = clnt->data;
 	MINFO_FROM(((struct i2c_bit_adapter*)a)->minfo);
 
-	md->mode = MODE_MONITOR;
+	ACCESS_FBINFO(altout.mode) = MODE_MONITOR;
 	md->primary_head = MINFO;
 	md->client = clnt;
 	down_write(&ACCESS_FBINFO(altout.lock));