[Intel-gfx] [PATCH 3/5] drm/i915: extract and improve gen8_irq_power_well_post_enable

[Rodrigo Vivi]

Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>


On Fri, Jul 4, 2014 at 7:50 AM, Paulo Zanoni <przanoni at gmail.com> wrote:

> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
>
> Move it from hsw_power_well_post_enable() (intel_pm.c) to i915_irq.c
> so we can reuse the nice IRQ macros we have there. The main difference
> is that now we're going to check if the IIR register is non-zero when
> we try to re-enable the interrupts.
>
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_irq.c  | 12 ++++++++++++
>  drivers/gpu/drm/i915/intel_drv.h |  1 +
>  drivers/gpu/drm/i915/intel_pm.c  | 18 ++----------------
>  3 files changed, 15 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_irq.c
> b/drivers/gpu/drm/i915/i915_irq.c
> index 2e116e9d..a8b8b6b 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -3204,6 +3204,18 @@ static void gen8_irq_reset(struct drm_device *dev)
>         ibx_irq_reset(dev);
>  }
>
> +void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv)
> +{
> +       unsigned long irqflags;
> +
> +       spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
> +       GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_B, dev_priv->de_irq_mask[PIPE_B],
> +                         ~dev_priv->de_irq_mask[PIPE_B]);
> +       GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_C, dev_priv->de_irq_mask[PIPE_C],
> +                         ~dev_priv->de_irq_mask[PIPE_C]);
> +       spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
> +}
> +
>  static void cherryview_irq_preinstall(struct drm_device *dev)
>  {
>         struct drm_i915_private *dev_priv = dev->dev_private;
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h
> index 5f7c7bd..46a3a09 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -687,6 +687,7 @@ void intel_runtime_pm_disable_interrupts(struct
> drm_device *dev);
>  void intel_runtime_pm_restore_interrupts(struct drm_device *dev);
>  int intel_get_crtc_scanline(struct intel_crtc *crtc);
>  void i9xx_check_fifo_underruns(struct drm_device *dev);
> +void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv);
>
>
>  /* intel_crt.c */
> diff --git a/drivers/gpu/drm/i915/intel_pm.c
> b/drivers/gpu/drm/i915/intel_pm.c
> index 31ae2b4..4cc9e5c 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -5913,7 +5913,6 @@ bool intel_display_power_enabled(struct
> drm_i915_private *dev_priv,
>  static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv)
>  {
>         struct drm_device *dev = dev_priv->dev;
> -       unsigned long irqflags;
>
>         /*
>          * After we re-enable the power well, if we touch VGA register
> 0x3d5
> @@ -5929,21 +5928,8 @@ static void hsw_power_well_post_enable(struct
> drm_i915_private *dev_priv)
>         outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
>         vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
>
> -       if (IS_BROADWELL(dev)) {
> -               spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
> -               I915_WRITE(GEN8_DE_PIPE_IMR(PIPE_B),
> -                          dev_priv->de_irq_mask[PIPE_B]);
> -               I915_WRITE(GEN8_DE_PIPE_IER(PIPE_B),
> -                          ~dev_priv->de_irq_mask[PIPE_B] |
> -                          GEN8_PIPE_VBLANK);
> -               I915_WRITE(GEN8_DE_PIPE_IMR(PIPE_C),
> -                          dev_priv->de_irq_mask[PIPE_C]);
> -               I915_WRITE(GEN8_DE_PIPE_IER(PIPE_C),
> -                          ~dev_priv->de_irq_mask[PIPE_C] |
> -                          GEN8_PIPE_VBLANK);
> -               POSTING_READ(GEN8_DE_PIPE_IER(PIPE_C));
> -               spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
> -       }
> +       if (IS_BROADWELL(dev))
> +               gen8_irq_power_well_post_enable(dev_priv);
>  }
>
>  static void hsw_set_power_well(struct drm_i915_private *dev_priv,
> --
> 2.0.0
>
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-- 
Rodrigo Vivi
Blog: http://blog.vivi.eng.br
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