At Fri, 06 Mar 2015 15:31:32 -0800, Alnie wrote:
On 03/04/2015 01:35 AM, Takashi Iwai wrote:
At Wed, 04 Mar 2015 01:01:32 -0800, Alnie wrote:
On 03/04/2015 12:00 AM, Takashi Iwai wrote:
At Tue, 03 Mar 2015 18:12:31 -0800, Alnie wrote:
My suggestion isn't about a compile option but that you add some debug printk() calls manually around some codes. We need to know the value written and read by azx_write*() and azx_read*() calls. Especially the value read in pci_azx_read*() is more interesting. You can try to modify sound/pci/hda/hda_intel.c and add a printk() to each pci_azx_read*() function for printing the value to be returned. Beware that this will likely flood many messages, so just try once.
Takashi
I can not find any reference to pci_azx_read in hda_intel.c
You must be using a too old kernel, then. Please use the latest kernel for debugging.
Takashi
Ok. I now have latest kernel.
Here is a small portion...
/* PCI register access. */ static void pci_azx_writel(u32 value, u32 __iomem *addr) { writel(value, addr); }
static u32 pci_azx_readl(u32 __iomem *addr) { return readl(addr); }
Can you show me how I can properly place printk without breaking things and produce relevant messages?
Something like:
static u32 pci_azx_readl(u32 __iomem *addr) { u32 val = readl(addr); pr_info("XXX readl %p %x\n", addr, val); return val; }
But since there are quite lots of accesses, it might be safer to use the ratelimited version. Use like the following: pr_info_ratelimited("XXX readl %p %x\n", addr, val);
Also there are variants pci_azx_readw() and _readb().
Takashi
Ok, I was only able to guess through the code for the read values. If you need write information too please show me how. here are the mods I made...
/* PCI register access. */ static void pci_azx_writel(u32 value, u32 __iomem *addr) { writel(value, addr); }
static u32 pci_azx_readl(u32 __iomem *addr) { u32 val = readl(addr); pr_info_ratelimited("XXX readl %p %x\n", addr, val); return val; }
static void pci_azx_writew(u16 value, u16 __iomem *addr) { writew(value, addr); }
static u16 pci_azx_readw(u16 __iomem *addr) { u16 val = readw(addr); pr_info_ratelimited("XXX readw %p %x\n", addr, val); return val; }
static void pci_azx_writeb(u8 value, u8 __iomem *addr) { writeb(value, addr); }
static u8 pci_azx_readb(u8 __iomem *addr) { u8 val = readb(addr); pr_info_ratelimited("XXX readb %p %x\n", addr, val); return val; }
and i was able to produce this...
dmesg | grep -i read [ 0.764102] tpm_tis 00:05: A TPM error (7) occurred attempting to read a pcr value [ 0.769674] Write protecting the kernel read-only data: 12288k [ 1.729952] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 2.071100] sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 2.778875] EXT4-fs (sda5): INFO: recovery required on readonly filesystem [ 2.817982] EXT4-fs (sda5): orphan cleanup on readonly fs [ 4.662442] XXX readw ffffc90004f30000 4401
This reads good, but I thought you have two sound devices (onboard and Creative)? If so, disable the onboard one via enable=0 option (if the onboard one is assigned first). Otherwise the all good and bad results are mixed up.
Takashi