diff mbox series

[v6,5/7] drm/i915: Add dedicated plane hook for async flip case

Message ID 20200807093551.10673-6-karthik.b.s@intel.com (mailing list archive)
State New, archived
Headers show
Series Asynchronous flip implementation for i915 | expand

Commit Message

Karthik B S Aug. 7, 2020, 9:35 a.m. UTC 
This hook is added to avoid writing other plane registers in case of
async flips, so that we do not write the double buffered registers
during async surface address update.

Signed-off-by: Karthik B S <karthik.b.s@intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
---
 drivers/gpu/drm/i915/display/intel_sprite.c | 25 +++++++++++++++++++++
 1 file changed, 25 insertions(+)

Comments

Ville Syrjala Sept. 1, 2020, 11:27 a.m. UTC | #1 
On Fri, Aug 07, 2020 at 03:05:49PM +0530, Karthik B S wrote:
> This hook is added to avoid writing other plane registers in case of
> async flips, so that we do not write the double buffered registers
> during async surface address update.
> 
> Signed-off-by: Karthik B S <karthik.b.s@intel.com>
> Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_sprite.c | 25 +++++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c
> index 2b2d96c59d7f..1c03546a4d2a 100644
> --- a/drivers/gpu/drm/i915/display/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/display/intel_sprite.c
> @@ -609,6 +609,24 @@ icl_program_input_csc(struct intel_plane *plane,
>  			  PLANE_INPUT_CSC_POSTOFF(pipe, plane_id, 2), 0x0);
>  }
>  
> +static void
> +skl_program_async_surface_address(struct drm_i915_private *dev_priv,
> +				  const struct intel_plane_state *plane_state,
> +				  enum pipe pipe, enum plane_id plane_id,
> +				  u32 surf_addr)
> +{
> +	unsigned long irqflags;
> +	u32 plane_ctl = plane_state->ctl;

Need the bits from skl_plane_ctl_crtc() too.

> +
> +	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
> +
> +	intel_de_write_fw(dev_priv, PLANE_CTL(pipe, plane_id), plane_ctl);
> +	intel_de_write_fw(dev_priv, PLANE_SURF(pipe, plane_id),
> +			  intel_plane_ggtt_offset(plane_state) + surf_addr);
> +
> +	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
> +}
> +
>  static void
>  skl_program_plane(struct intel_plane *plane,
>  		  const struct intel_crtc_state *crtc_state,
> @@ -637,6 +655,13 @@ skl_program_plane(struct intel_plane *plane,
>  	u32 keymsk, keymax;
>  	u32 plane_ctl = plane_state->ctl;
>  
> +	/* During Async flip, no other updates are allowed */
> +	if (crtc_state->uapi.async_flip) {
> +		skl_program_async_surface_address(dev_priv, plane_state,
> +						  pipe, plane_id, surf_addr);
> +		return;
> +	}

I'd suggest adding a vfunc for this. Should be able to call it from
intel_update_plane(). That way we don't need to patch it into each
and every .update_plane() implementation.


> +
>  	plane_ctl |= skl_plane_ctl_crtc(crtc_state);
>  
>  	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
> -- 
> 2.22.0
Karthik B S Sept. 2, 2020, 1:52 p.m. UTC | #2 
On 9/1/2020 4:57 PM, Ville Syrjälä wrote:
> On Fri, Aug 07, 2020 at 03:05:49PM +0530, Karthik B S wrote:
>> This hook is added to avoid writing other plane registers in case of
>> async flips, so that we do not write the double buffered registers
>> during async surface address update.
>>
>> Signed-off-by: Karthik B S <karthik.b.s@intel.com>
>> Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
>> ---
>>   drivers/gpu/drm/i915/display/intel_sprite.c | 25 +++++++++++++++++++++
>>   1 file changed, 25 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c
>> index 2b2d96c59d7f..1c03546a4d2a 100644
>> --- a/drivers/gpu/drm/i915/display/intel_sprite.c
>> +++ b/drivers/gpu/drm/i915/display/intel_sprite.c
>> @@ -609,6 +609,24 @@ icl_program_input_csc(struct intel_plane *plane,
>>   			  PLANE_INPUT_CSC_POSTOFF(pipe, plane_id, 2), 0x0);
>>   }
>>   
>> +static void
>> +skl_program_async_surface_address(struct drm_i915_private *dev_priv,
>> +				  const struct intel_plane_state *plane_state,
>> +				  enum pipe pipe, enum plane_id plane_id,
>> +				  u32 surf_addr)
>> +{
>> +	unsigned long irqflags;
>> +	u32 plane_ctl = plane_state->ctl;
> 
> Need the bits from skl_plane_ctl_crtc() too.

Thanks for the review.
Sure, I'll update this.
> 
>> +
>> +	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
>> +
>> +	intel_de_write_fw(dev_priv, PLANE_CTL(pipe, plane_id), plane_ctl);
>> +	intel_de_write_fw(dev_priv, PLANE_SURF(pipe, plane_id),
>> +			  intel_plane_ggtt_offset(plane_state) + surf_addr);
>> +
>> +	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
>> +}
>> +
>>   static void
>>   skl_program_plane(struct intel_plane *plane,
>>   		  const struct intel_crtc_state *crtc_state,
>> @@ -637,6 +655,13 @@ skl_program_plane(struct intel_plane *plane,
>>   	u32 keymsk, keymax;
>>   	u32 plane_ctl = plane_state->ctl;
>>   
>> +	/* During Async flip, no other updates are allowed */
>> +	if (crtc_state->uapi.async_flip) {
>> +		skl_program_async_surface_address(dev_priv, plane_state,
>> +						  pipe, plane_id, surf_addr);
>> +		return;
>> +	}
> 
> I'd suggest adding a vfunc for this. Should be able to call it from
> intel_update_plane(). That way we don't need to patch it into each
> and every .update_plane() implementation.
> 

Sure. I will add a vfunc for this in intel_plane and call it directly 
from intel_update_plane()

Thanks,
Karthik.B.S
> 
>> +
>>   	plane_ctl |= skl_plane_ctl_crtc(crtc_state);
>>   
>>   	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
>> -- 
>> 2.22.0
>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c
index 2b2d96c59d7f..1c03546a4d2a 100644
--- a/drivers/gpu/drm/i915/display/intel_sprite.c
+++ b/drivers/gpu/drm/i915/display/intel_sprite.c
@@ -609,6 +609,24 @@  icl_program_input_csc(struct intel_plane *plane,
 			  PLANE_INPUT_CSC_POSTOFF(pipe, plane_id, 2), 0x0);
 }
 
+static void
+skl_program_async_surface_address(struct drm_i915_private *dev_priv,
+				  const struct intel_plane_state *plane_state,
+				  enum pipe pipe, enum plane_id plane_id,
+				  u32 surf_addr)
+{
+	unsigned long irqflags;
+	u32 plane_ctl = plane_state->ctl;
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+
+	intel_de_write_fw(dev_priv, PLANE_CTL(pipe, plane_id), plane_ctl);
+	intel_de_write_fw(dev_priv, PLANE_SURF(pipe, plane_id),
+			  intel_plane_ggtt_offset(plane_state) + surf_addr);
+
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
 static void
 skl_program_plane(struct intel_plane *plane,
 		  const struct intel_crtc_state *crtc_state,
@@ -637,6 +655,13 @@  skl_program_plane(struct intel_plane *plane,
 	u32 keymsk, keymax;
 	u32 plane_ctl = plane_state->ctl;
 
+	/* During Async flip, no other updates are allowed */
+	if (crtc_state->uapi.async_flip) {
+		skl_program_async_surface_address(dev_priv, plane_state,
+						  pipe, plane_id, surf_addr);
+		return;
+	}
+
 	plane_ctl |= skl_plane_ctl_crtc(crtc_state);
 
 	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))