[PATCH] zr36067: Debugging cleanups

Debugging cleanups to the zoran (zr36067) driver:

* Use a single global variable to handle the debug level. This makes
  the driver a bit smaller (by about 800 bytes on x86_64), thanks to
  one less level of indirection on every use.

* Change the debug parameter sysfs permissions, so that the debug
  level can be adjusted at runtime, as is done in many other
  media/video drivers.

* Move the dprintk macro definition to a header file so that we don't
  have to define it in each source file.

* The debug level is between 0 and 5, not 0 and 4.

Signed-off-by: Jean Delvare <[email protected]>
---
 drivers/media/video/zoran_card.c   |   17 +++++------------
 drivers/media/video/zoran_card.h   |    7 +++++++
 drivers/media/video/zoran_device.c |   17 +++++------------
 drivers/media/video/zoran_driver.c |   20 +++++---------------
 drivers/media/video/zoran_procfs.c |    9 +--------
 5 files changed, 23 insertions(+), 47 deletions(-)

--- linux-2.6.21-git.orig/drivers/media/video/zoran_card.c	2007-05-07 10:58:31.000000000 +0200
+++ linux-2.6.21-git/drivers/media/video/zoran_card.c	2007-05-07 11:00:02.000000000 +0200
@@ -145,10 +145,9 @@ module_param(pass_through, int, 0);
 MODULE_PARM_DESC(pass_through,
 		 "Pass TV signal through to TV-out when idling");
 
-static int debug = 1;
-int *zr_debug = &debug;
-module_param(debug, int, 0);
-MODULE_PARM_DESC(debug, "Debug level (0-4)");
+int debug = 1;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Debug level (0-5)");
 
 MODULE_DESCRIPTION("Zoran-36057/36067 JPEG codec driver");
 MODULE_AUTHOR("Serguei Miridonov");
@@ -161,12 +160,6 @@ static struct pci_device_id zr36067_pci_
 };
 MODULE_DEVICE_TABLE(pci, zr36067_pci_tbl);
 
-#define dprintk(num, format, args...) \
-	do { \
-		if (*zr_debug >= num) \
-			printk(format, ##args); \
-	} while (0)
-
 int zoran_num;			/* number of Buzs in use */
 struct zoran zoran[BUZ_MAX];
 
@@ -1075,7 +1068,7 @@ test_interrupts (struct zoran *zr)
 	if (timeout) {
 		dprintk(1, ": time spent: %d\n", 1 * HZ - timeout);
 	}
-	if (*zr_debug > 1)
+	if (debug > 1)
 		print_interrupts(zr);
 	btwrite(icr, ZR36057_ICR);
 }
@@ -1158,7 +1151,7 @@ zr36057_init (struct zoran *zr)
 		goto exit_unregister;
 
 	zoran_init_hardware(zr);
-	if (*zr_debug > 2)
+	if (debug > 2)
 		detect_guest_activity(zr);
 	test_interrupts(zr);
 	if (!pass_through) {
--- linux-2.6.21-git.orig/drivers/media/video/zoran_card.h	2007-05-07 10:58:31.000000000 +0200
+++ linux-2.6.21-git/drivers/media/video/zoran_card.h	2007-05-07 11:00:02.000000000 +0200
@@ -30,6 +30,13 @@
 #ifndef __ZORAN_CARD_H__
 #define __ZORAN_CARD_H__
 
+extern int debug;
+#define dprintk(num, format, args...) \
+	do { \
+		if (debug >= num) \
+			printk(format, ##args); \
+	} while (0)
+
 /* Anybody who uses more than four? */
 #define BUZ_MAX 4
 extern int zoran_num;
--- linux-2.6.21-git.orig/drivers/media/video/zoran_device.c	2007-05-07 10:58:31.000000000 +0200
+++ linux-2.6.21-git/drivers/media/video/zoran_device.c	2007-05-07 11:00:02.000000000 +0200
@@ -52,6 +52,7 @@
 #include "videocodec.h"
 #include "zoran.h"
 #include "zoran_device.h"
+#include "zoran_card.h"
 
 #define IRQ_MASK ( ZR36057_ISR_GIRQ0 | \
 		   ZR36057_ISR_GIRQ1 | \
@@ -59,14 +60,6 @@
 
 extern const struct zoran_format zoran_formats[];
 
-extern int *zr_debug;
-
-#define dprintk(num, format, args...) \
-	do { \
-		if (*zr_debug >= num) \
-			printk(format, ##args); \
-	} while (0)
-
 static int lml33dpath = 0;	/* 1 will use digital path in capture
 				 * mode instead of analog. It can be
 				 * used for picture adjustments using
@@ -174,7 +167,7 @@ post_office_read (struct zoran *zr,
 static void
 dump_guests (struct zoran *zr)
 {
-	if (*zr_debug > 2) {
+	if (debug > 2) {
 		int i, guest[8];
 
 		for (i = 1; i < 8; i++) {	// Don't read jpeg codec here
@@ -1295,7 +1288,7 @@ error_handler (struct zoran *zr,
 		zr->num_errors++;
 
 		/* Report error */
-		if (*zr_debug > 1 && zr->num_errors <= 8) {
+		if (debug > 1 && zr->num_errors <= 8) {
 			long frame;
 			frame =
 			    zr->jpg_pend[zr->jpg_dma_tail & BUZ_MASK_FRAME];
@@ -1555,7 +1548,7 @@ zoran_irq (int             irq,
 
 			if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS ||
 			    zr->codec_mode == BUZ_MODE_MOTION_COMPRESS) {
-				if (*zr_debug > 1 &&
+				if (debug > 1 &&
 				    (!zr->frame_num || zr->JPEG_error)) {
 					printk(KERN_INFO
 					       "%s: first frame ready: state=0x%08x odd_even=%d field_per_buff=%d delay=%d\n",
@@ -1592,7 +1585,7 @@ zoran_irq (int             irq,
 						    zr->JPEG_missed;
 				}
 
-				if (*zr_debug > 2 && zr->frame_num < 6) {
+				if (debug > 2 && zr->frame_num < 6) {
 					int i;
 					printk("%s: seq=%ld stat_com:",
 					       ZR_DEVNAME(zr), zr->jpg_seq_num);
--- linux-2.6.21-git.orig/drivers/media/video/zoran_procfs.c	2007-05-07 10:58:31.000000000 +0200
+++ linux-2.6.21-git/drivers/media/video/zoran_procfs.c	2007-05-07 11:00:02.000000000 +0200
@@ -48,14 +48,7 @@
 #include "videocodec.h"
 #include "zoran.h"
 #include "zoran_procfs.h"
-
-extern int *zr_debug;
-
-#define dprintk(num, format, args...) \
-	do { \
-		if (*zr_debug >= num) \
-			printk(format, ##args); \
-	} while (0)
+#include "zoran_card.h"
 
 #ifdef CONFIG_PROC_FS
 struct procfs_params_zr36067 {
--- linux-2.6.21-git.orig/drivers/media/video/zoran_driver.c	2007-05-07 10:58:31.000000000 +0200
+++ linux-2.6.21-git/drivers/media/video/zoran_driver.c	2007-05-07 11:00:02.000000000 +0200
@@ -192,14 +192,6 @@ static const int zoran_num_formats =
 #   include <linux/bigphysarea.h>
 #endif
 
-extern int *zr_debug;
-
-#define dprintk(num, format, args...) \
-	do { \
-		if (*zr_debug >= num) \
-			printk(format, ##args);	\
-	} while (0)
-
 extern int v4l_nbufs;
 extern int v4l_bufsize;
 extern int jpg_nbufs;
@@ -1154,12 +1146,10 @@ jpg_sync (struct file       *file,
 		frame = zr->jpg_pend[zr->jpg_que_tail & BUZ_MASK_FRAME];
 
 	/* buffer should now be in BUZ_STATE_DONE */
-	if (*zr_debug > 0)
-		if (zr->jpg_buffers.buffer[frame].state != BUZ_STATE_DONE)
-			dprintk(2,
-				KERN_ERR
-				"%s: jpg_sync() - internal state error\n",
-				ZR_DEVNAME(zr));
+	if (zr->jpg_buffers.buffer[frame].state != BUZ_STATE_DONE)
+		dprintk(2,
+			KERN_ERR "%s: jpg_sync() - internal state error\n",
+			ZR_DEVNAME(zr));
 
 	*bs = zr->jpg_buffers.buffer[frame].bs;
 	bs->frame = frame;
@@ -1433,7 +1423,7 @@ zoran_close (struct inode *inode,
 		/* disable interrupts */
 		btand(~ZR36057_ICR_IntPinEn, ZR36057_ICR);
 
-		if (*zr_debug > 1)
+		if (debug > 1)
 			print_interrupts(zr);
 
 		/* Overlay off */


-- 
Jean Delvare

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