[Intel-gfx] [PATCH 03/11] drm/i915: don't try to find crtcs for FBC if it's disabled

[Rodrigo Vivi]

On Mon, Dec 8, 2014 at 8:09 AM, Paulo Zanoni <przanoni at gmail.com> wrote:
> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
>
> .. because it would be a waste of time, so move the place where the
> check is done. Also, with this we won't risk printing "more than one
> pipe active, disabling compression" or "no output, disabling" when FBC
> is actually disabled.
>
> This patch also represents a small behavior difference when using
> i915.powersave=0: it is now exactly the same as i915.enable_fbc=0 on
> this part of the code.

I always ask myself if we should continue using this i915.powersave here.
I vaguely remember someone complaining when I tried to re-org this
i915.powersave making it a umbrealla for all powersaving features and
the complain was to avoid more than one variable for feature... to
avoid superset of parameters, or something like that.

Or if we keep this here shouldn't we also put this to disable psr?

Anyway this can be another patch. Daniel, please let me know what you
want with this parameters that I can change that later.

So for this patch:
Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>

>
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_fbc.c | 20 ++++++++------------
>  1 file changed, 8 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
> index 7686573..4647d57 100644
> --- a/drivers/gpu/drm/i915/intel_fbc.c
> +++ b/drivers/gpu/drm/i915/intel_fbc.c
> @@ -521,10 +521,16 @@ void intel_fbc_update(struct drm_device *dev)
>                 return;
>         }
>
> -       if (!i915.powersave) {
> +       if (i915.enable_fbc < 0) {
> +               if (set_no_fbc_reason(dev_priv, FBC_CHIP_DEFAULT))
> +                       DRM_DEBUG_KMS("disabled per chip default\n");
> +               goto out_disable;
> +       }
> +
> +       if (!i915.enable_fbc || !i915.powersave) {
>                 if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM))
>                         DRM_DEBUG_KMS("fbc disabled per module param\n");
> -               return;
> +               goto out_disable;
>         }
>
>         /*
> @@ -559,16 +565,6 @@ void intel_fbc_update(struct drm_device *dev)
>         obj = intel_fb_obj(fb);
>         adjusted_mode = &intel_crtc->config.adjusted_mode;
>
> -       if (i915.enable_fbc < 0) {
> -               if (set_no_fbc_reason(dev_priv, FBC_CHIP_DEFAULT))
> -                       DRM_DEBUG_KMS("disabled per chip default\n");
> -               goto out_disable;
> -       }
> -       if (!i915.enable_fbc) {
> -               if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM))
> -                       DRM_DEBUG_KMS("fbc disabled per module param\n");
> -               goto out_disable;
> -       }
>         if ((adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) ||
>             (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)) {
>                 if (set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE))
> --
> 2.1.3
>
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-- 
Rodrigo Vivi
Blog: http://blog.vivi.eng.br