linux-kernel - Re: Optiarc DVD RW AD-5200A audio playing

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Message-ID: <20080216090532.GK13446@gollum.tnic>
Date:	Sat, 16 Feb 2008 10:05:32 +0100
From:	Borislav Petkov <petkovbb@...glemail.com>
To:	Stefan Bader <stefan.bader@...onical.com>
Cc:	bzolnier@...il.com, linux-kernel@...r.kernel.org,
	linux-ide@...r.kernel.org
Subject: Re: Optiarc DVD RW AD-5200A audio playing

On Fri, Feb 15, 2008 at 02:53:27PM -0500, Stefan Bader wrote:
> Hello Borislav,
> 
> I worked on a problem with an DVD driver (model=Optiarc DVD RW AD-5200A)
> which obviously has the same problem as some Matshita drives. The
> following patch was reported to enabled audio playing on this drive.
> Would this approach be suitable for upstream or are there other
> solutions to this problem?
> 
> Regards,
> Stefan
> 
> --- a/drivers/ide/ide-cd.c
> +++ b/drivers/ide/ide-cd.c
> @@ -2988,7 +2988,8 @@ int ide_cdrom_probe_capabilities (ide_drive_t *drive)
>  	if (strcmp(drive->id->model, "MATSHITADVD-ROM SR-8187") == 0 ||
>  	    strcmp(drive->id->model, "MATSHITADVD-ROM SR-8186") == 0 ||
>  	    strcmp(drive->id->model, "MATSHITADVD-ROM SR-8176") == 0 ||
> -	    strcmp(drive->id->model, "MATSHITADVD-ROM SR-8174") == 0)
> +	    strcmp(drive->id->model, "MATSHITADVD-ROM SR-8174") == 0 ||
> +	    strcmp(drive->id->model, "Optiarc DVD RW AD-5200A") == 0)
>  		CDROM_CONFIG_FLAGS(drive)->audio_play = 1;
> 
>  #if ! STANDARD_ATAPI

Hi Stefan,

just to make sure that the audioplay bit is not set in the capabilities page,
can you please try the following patch applied against 2.6.25-rc2 and send me
the output. Thanks!

@Bart: by the way, this cdi->mask thingy is kinda unintuitive doing double
negation to check whether a feature is supported or not. Yeah, this comes from
"above," i.e. uniform cdrom layer. But still, shouldn't we use a cdi->caps_flags
or something similar instead, which mirrors the caps page bits setting?

commit 435f0f4496a1b32af2d542f43b2370a890fe2f83
Author: Borislav Petkov <petkovbb@...il.com>
Date:   Sat Feb 16 09:56:36 2008 +0100

    ide-cd: Enable audio play quirk for Optiarc DVD RW AD-5200A drive
    
    Reported-by: Stefan Bader <stefan.bader@...onical.com>
    Signed-off-by: Borislav Petkov <petkovbb@...il.com>

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index f77db6b..2c9d06e 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1750,6 +1750,10 @@ int ide_cdrom_probe_capabilities (ide_drive_t *drive)
 		cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
 	if (buf[8 + 3] & 0x10)
 		cdi->mask &= ~CDC_DVD_R;
+	if (!(buf[8 + 4] & 0x01)) {
+		printk(KERN_INFO "ide-cd: audio play not advertised in caps page,"
+				 " enabling quirk.\n");
+	}
 	if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK))
 		cdi->mask &= ~CDC_PLAY_AUDIO;
 
@@ -1929,6 +1933,7 @@ static const struct cd_list_entry ide_cd_quirks_list[] = {
 	{ "MATSHITADVD-ROM SR-8186", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK	    },
 	{ "MATSHITADVD-ROM SR-8176", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK	    },
 	{ "MATSHITADVD-ROM SR-8174", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK	    },
+	{ "Optiarc DVD RW AD-5200A", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
 	{ NULL, NULL, 0 }
 };
 

-- 
Regards/Gruß,
    Boris.
--
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