[Intel-gfx] [PATCH] drm/i915: Show dmc debug registers on Kabylake

[Mika Kuoppala]

Nathan Ciobanu <nathan.d.ciobanu at linux.intel.com> writes:

> On Tue, May 09, 2017 at 04:16:12PM +0300, Mika Kuoppala wrote:
>> Imre Deak <imre.deak at intel.com> writes:
>> 
>> > On Tue, May 09, 2017 at 01:05:22PM +0300, Mika Kuoppala wrote:
>> >> The assumption is that the registers offsets are
>> >> identical as with skl. Also all the published
>> >> kbl firmwares support the debug registers. So
>> >> let kbl show the debug counts.
>> >> 
>> >> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100975
>> >> Cc: Imre Deak <imre.deak at intel.com>
>> >> Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>
>> >
>> > Reviewed-by: Imre Deak <imre.deak at intel.com>
>> 
>> Pushed. Thanks for review!
>> -Mika
> Mika, the initial version of the KBL DMC firmware is 1.01 so
> because CSR_VERSION is checking for >1.6 this will

I am quite certain that it checks the version only with skl.
-Mika

> still not work. See Rodrigo's original patch that added it to
> linux-firmware:
> https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=9facc31d772a3ed399760d2168d644f9de84d6db
>> 
>> 
>> >
>> >> ---
>> >>  drivers/gpu/drm/i915/i915_debugfs.c | 3 ++-
>> >>  1 file changed, 2 insertions(+), 1 deletion(-)
>> >> 
>> >> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
>> >> index 1003511..34785fb 100644
>> >> --- a/drivers/gpu/drm/i915/i915_debugfs.c
>> >> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
>> >> @@ -2853,7 +2853,8 @@ static int i915_dmc_info(struct seq_file *m, void *unused)
>> >>  	seq_printf(m, "version: %d.%d\n", CSR_VERSION_MAJOR(csr->version),
>> >>  		   CSR_VERSION_MINOR(csr->version));
>> >>  
>> >> -	if (IS_SKYLAKE(dev_priv) && csr->version >= CSR_VERSION(1, 6)) {
>> >> +	if (IS_KABYLAKE(dev_priv) ||
>> >> +	    (IS_SKYLAKE(dev_priv) && csr->version >= CSR_VERSION(1, 6))) {
>> >>  		seq_printf(m, "DC3 -> DC5 count: %d\n",
>> >>  			   I915_READ(SKL_CSR_DC3_DC5_COUNT));
>> >>  		seq_printf(m, "DC5 -> DC6 count: %d\n",
>> >> -- 
>> >> 2.7.4
>> >> 
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