[Intel-gfx] [PATCH 44/67] drm/i915/cnl: DC3 to DC5 counters available on CNL.

[Animesh Manna]

On 4/7/2017 12:45 AM, Rodrigo Vivi wrote:
> There is no confirmation if the DC5 to DC6 is available on CNL
> though. But I could see DC3 to DC5 counter increasing reliably.
> So let's at least add this one.
>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> ---
>   drivers/gpu/drm/i915/i915_debugfs.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index d07257b..2ae79a6 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -2859,7 +2859,10 @@ 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_CANNONLAKE(dev_priv)) {
> +		seq_printf(m, "DC3 -> DC5 count: %d\n",
> +			   I915_READ(SKL_CSR_DC3_DC5_COUNT));

Have not found any info regarding DC5/DC6-counter in bspec for CNL.
I assume H/W team stop exposing these counter as I can not see DC5/DC6 counter details for other platform other than gen9(skl/bxt).
Not sure is it ok to rely on something which is not confirmed.

Regards,
Animesh

> +	} else if (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",