For the series,
Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.olive...@intel.com>
On 10/30/2014 08:54 PM, Jesse Barnes wrote:
> This should allow us to avoid mode sets for some panel fitter config
> changes.
>
> v2:
> - fixup pfit comment (Ander)
>
> Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org>
> ---
> drivers/gpu/drm/i915/intel_display.c | 61
> +++++++++++++++++++++++++++++-------
> 1 file changed, 50 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index 470cdac..56154a1 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -2831,17 +2831,8 @@ static void intel_update_pipe_size(struct intel_crtc
> *crtc)
> return;
>
> /*
> - * Update pipe size and adjust fitter if needed: the reason for this is
> - * that in compute_mode_changes we check the native mode (not the pfit
> - * mode) to see if we can flip rather than do a full mode set. In the
> - * fastboot case, we'll flip, but if we don't update the pipesrc and
> - * pfit state, we'll end up with a big fb scanned out into the wrong
> - * sized surface.
> - *
> - * To fix this properly, we need to hoist the checks up into
> - * compute_mode_changes (or above), check the actual pfit state and
> - * whether the platform allows pfit disable with pipe active, and only
> - * then update the pipesrc and pfit state, even on the flip path.
> + * See intel_pfit_changed for info on when we're allowed to
> + * do this w/o a pipe shutdown.
> */
>
> adjusted_mode = &crtc->config.adjusted_mode;
> @@ -11423,6 +11414,50 @@ static void disable_crtc_nofb(struct intel_crtc
> *crtc)
> crtc->new_config = NULL;
> }
>
> +/* Do we need a mode set due to pfit changes? */
> +static bool intel_pfit_changed(struct drm_device *dev,
> + struct intel_crtc_config *new_config,
> + struct intel_crtc_config *cur_config)
> +{
> + bool ret = false;
> +
> + if (HAS_DDI(dev) || HAS_PCH_SPLIT(dev)) {
> + /*
> + * On PCH platforms we can disable pfit w/o a pipe shutdown,
> + * otherwise we'll need a mode set.
> + */
> + if (new_config->pch_pfit.enabled &&
> + cur_config->pch_pfit.enabled)
> + ret = false;
> + else if (new_config->pch_pfit.enabled &&
> + !cur_config->pch_pfit.enabled)
> + ret = true;
> + else if (!new_config->pch_pfit.enabled &&
> + cur_config->pch_pfit.enabled)
> + ret = false;
> + else if (!new_config->pch_pfit.enabled &&
> + !cur_config->pch_pfit.enabled)
> + ret = false;
> + } else {
> + bool new_enabled, old_enabled;
> +
> + new_enabled = !!(new_config->gmch_pfit.control & PFIT_ENABLE);
> + old_enabled = !!(cur_config->gmch_pfit.control & PFIT_ENABLE);
> +
> + /* 9xx only needs a shutdown to disable pfit */
> + if (new_enabled && old_enabled)
> + ret = false;
> + else if (new_enabled && !old_enabled)
> + ret = false;
> + else if (!new_enabled && old_enabled)
> + ret = true;
> + else if (!new_enabled && !old_enabled)
> + ret = false;
> + }
> +
> + return ret;
> +}
> +
> static int intel_crtc_set_config(struct drm_mode_set *set)
> {
> struct drm_device *dev;
> @@ -11489,6 +11524,10 @@ static int intel_crtc_set_config(struct drm_mode_set
> *set)
> to_intel_crtc(set->crtc)->config.has_infoframe)
> config->mode_changed = true;
>
> + if (intel_pfit_changed(dev, to_intel_crtc(set->crtc)->new_config,
> + &to_intel_crtc(set->crtc)->config))
> + config->mode_changed = true;
> +
> intel_update_pipe_size(to_intel_crtc(set->crtc));
>
> if (config->mode_changed) {
>
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