Re: [PATCH] drm/i915: Add 180 degree primary plane rotation support

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On Fri, Aug 22, 2014 at 02:06:04PM +0530, sonika.jindal@xxxxxxxxx wrote:
> From: Sonika Jindal <sonika.jindal@xxxxxxxxx>
> 
> Primary planes support 180 degree rotation. Expose the feature
> through rotation drm property.
> 
> v2: Calculating linear/tiled offsets based on pipe source width and
> height. Added 180 degree rotation support in ironlake_update_plane.
> 
> v3: Checking if CRTC is active before issueing update_plane. Added
> wait for vblank to make sure we dont overtake page flips. Disabling
> FBC since it does not work with rotated planes.
> 
> v4: Updated rotation checks for pending flips, fbc disable. Creating
> rotation property only for Gen4 onwards. Property resetting as part
> of lastclose.
> 
> v5: Resetting property in i915_driver_lastclose properly for planes
> and crtcs. Fixed linear offset calculation that was off by 1 w.r.t
> width in i9xx_update_plane and ironlake_update_plane. Removed tab
> based indentation and unnecessary braces in intel_crtc_set_property
> and intel_update_fbc. FBC and flip related checks should be done only
> for valid crtcs.
> 
> v6: Minor nits in FBC disable checks for comments in intel_crtc_set_property
> and positioning the disable code in intel_update_fbc.
> 
> v7: In case rotation property on inactive crtc is updated, we return
> successfully printing debug log as crtc is inactive and only property change
> is preserved.
> 
> v8: update_plane is changed to update_primary_plane, crtc->fb is changed to
> crtc->primary->fb  and return value of update_primary_plane is ignored.
> 
> v9: added rotation property to primary plane instead of crtc. Removing reset
> of rotation property from lastclose. rotation_property is moved to
> drm_mode_config, so drm layer will take care of resetting. Adding updation of
> fbc when rotation is set to 0. Allowing rotation only if value is
> different than old one.
> 
> v10: Calling intel_primary_plane_setplane instead of update_primary_plane in
> set_property(Daniel).
> 
> v11: Using same set_property function for both primary and sprite, Adding
> primary plane specific code in the same function (Matt).
> 
> v12: Removing disabling/ enabling of fbc from set_property because it is done
> from intel_pipe_set_base. Other formatting
> 
> v13: we need to call disable_fbc before changing the rotation to 180,
> disable_fbc from intel_pipe_set_base gets called very late, that will
> be used to re-enable fbc if rotation is set to 0 (Ville).
> 
> Testcase: igt/kms_rotation_crc
> 
> Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
> Signed-off-by: Sagar Kamble <sagar.a.kamble@xxxxxxxxx>
> Signed-off-by: Sonika Jindal <sonika.jindal@xxxxxxxxx>

Queued for -next, thanks for the patch. I've added a FIXME to the
disable_fbc so that we know there's some work left to do in the future.

And I've polished the coding style a bit in some places (function argument
alignement, comment style and folding int some nested if clauses).
-Daniel
> ---
>  drivers/gpu/drm/i915/i915_reg.h      |    1 +
>  drivers/gpu/drm/i915/intel_display.c |   69 ++++++++++++++++++++++++++++++++--
>  drivers/gpu/drm/i915/intel_drv.h     |    3 ++
>  drivers/gpu/drm/i915/intel_pm.c      |    6 +++
>  drivers/gpu/drm/i915/intel_sprite.c  |    4 +-
>  5 files changed, 77 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 203062e..142ac52 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -4214,6 +4214,7 @@ enum punit_power_well {
>  #define   DISPPLANE_NO_LINE_DOUBLE		0
>  #define   DISPPLANE_STEREO_POLARITY_FIRST	0
>  #define   DISPPLANE_STEREO_POLARITY_SECOND	(1<<18)
> +#define   DISPPLANE_ROTATE_180         (1<<15)
>  #define   DISPPLANE_TRICKLE_FEED_DISABLE	(1<<14) /* Ironlake */
>  #define   DISPPLANE_TILED			(1<<10)
>  #define _DSPAADDR				0x70184
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index f2a8797..0c77438 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -2384,6 +2384,9 @@ static void i9xx_update_primary_plane(struct drm_crtc *crtc,
>  	unsigned long linear_offset;
>  	u32 dspcntr;
>  	u32 reg = DSPCNTR(plane);
> +	int pixel_size;
> +
> +	pixel_size = drm_format_plane_cpp(fb->pixel_format, 0);
>  
>  	if (!intel_crtc->primary_enabled) {
>  		I915_WRITE(reg, 0);
> @@ -2450,8 +2453,6 @@ static void i9xx_update_primary_plane(struct drm_crtc *crtc,
>  	if (IS_G4X(dev))
>  		dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
>  
> -	I915_WRITE(reg, dspcntr);
> -
>  	linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
>  
>  	if (INTEL_INFO(dev)->gen >= 4) {
> @@ -2464,6 +2465,21 @@ static void i9xx_update_primary_plane(struct drm_crtc *crtc,
>  		intel_crtc->dspaddr_offset = linear_offset;
>  	}
>  
> +	if (to_intel_plane(crtc->primary)->rotation == BIT(DRM_ROTATE_180)) {
> +		dspcntr |= DISPPLANE_ROTATE_180;
> +
> +		x += (intel_crtc->config.pipe_src_w - 1);
> +		y += (intel_crtc->config.pipe_src_h - 1);
> +
> +		/* Finding the last pixel of the last line of the display
> +		data and adding to linear_offset*/
> +		linear_offset +=
> +			(intel_crtc->config.pipe_src_h - 1) * fb->pitches[0] +
> +			(intel_crtc->config.pipe_src_w - 1) * pixel_size;
> +	}
> +
> +	I915_WRITE(reg, dspcntr);
> +
>  	DRM_DEBUG_KMS("Writing base %08lX %08lX %d %d %d\n",
>  		      i915_gem_obj_ggtt_offset(obj), linear_offset, x, y,
>  		      fb->pitches[0]);
> @@ -2490,6 +2506,9 @@ static void ironlake_update_primary_plane(struct drm_crtc *crtc,
>  	unsigned long linear_offset;
>  	u32 dspcntr;
>  	u32 reg = DSPCNTR(plane);
> +	int pixel_size;
> +
> +	pixel_size = drm_format_plane_cpp(fb->pixel_format, 0);
>  
>  	if (!intel_crtc->primary_enabled) {
>  		I915_WRITE(reg, 0);
> @@ -2538,14 +2557,28 @@ static void ironlake_update_primary_plane(struct drm_crtc *crtc,
>  	if (!IS_HASWELL(dev) && !IS_BROADWELL(dev))
>  		dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
>  
> -	I915_WRITE(reg, dspcntr);
> -
>  	linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
>  	intel_crtc->dspaddr_offset =
>  		intel_gen4_compute_page_offset(&x, &y, obj->tiling_mode,
>  					       fb->bits_per_pixel / 8,
>  					       fb->pitches[0]);
>  	linear_offset -= intel_crtc->dspaddr_offset;
> +	if (to_intel_plane(crtc->primary)->rotation == BIT(DRM_ROTATE_180)) {
> +		dspcntr |= DISPPLANE_ROTATE_180;
> +
> +		if (!IS_HASWELL(dev) && !IS_BROADWELL(dev)) {
> +			x += (intel_crtc->config.pipe_src_w - 1);
> +			y += (intel_crtc->config.pipe_src_h - 1);
> +
> +			/* Finding the last pixel of the last line of the display
> +			data and adding to linear_offset*/
> +			linear_offset +=
> +				(intel_crtc->config.pipe_src_h - 1) * fb->pitches[0] +
> +				(intel_crtc->config.pipe_src_w - 1) * pixel_size;
> +		}
> +	}
> +
> +	I915_WRITE(reg, dspcntr);
>  
>  	DRM_DEBUG_KMS("Writing base %08lX %08lX %d %d %d\n",
>  		      i915_gem_obj_ggtt_offset(obj), linear_offset, x, y,
> @@ -11572,6 +11605,7 @@ intel_primary_plane_setplane(struct drm_plane *plane, struct drm_crtc *crtc,
>  			     uint32_t src_w, uint32_t src_h)
>  {
>  	struct drm_device *dev = crtc->dev;
> +	struct drm_i915_private *dev_priv = dev->dev_private;
>  	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>  	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
>  	struct drm_i915_gem_object *old_obj = intel_fb_obj(plane->fb);
> @@ -11684,6 +11718,18 @@ intel_primary_plane_setplane(struct drm_plane *plane, struct drm_crtc *crtc,
>  		mutex_unlock(&dev->struct_mutex);
>  
>  	} else {
> +		if (intel_crtc && intel_crtc->active &&
> +				intel_crtc->primary_enabled) {
> +
> +			/* FBC does not work on some platforms for rotated
> +			   planes, so disable it when rotation is not 0 and update
> +			   it when rotation is set back to 0 */
> +			if (INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev)) {
> +				if (dev_priv->fbc.plane == intel_crtc->plane &&
> +						intel_plane->rotation != BIT(DRM_ROTATE_0))
> +					intel_disable_fbc(dev);
> +			}
> +		}
>  		ret = intel_pipe_set_base(crtc, src.x1, src.y1, fb);
>  		if (ret)
>  			return ret;
> @@ -11717,6 +11763,7 @@ static const struct drm_plane_funcs intel_primary_plane_funcs = {
>  	.update_plane = intel_primary_plane_setplane,
>  	.disable_plane = intel_primary_plane_disable,
>  	.destroy = intel_plane_destroy,
> +	.set_property = intel_plane_set_property
>  };
>  
>  static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
> @@ -11734,6 +11781,7 @@ static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
>  	primary->max_downscale = 1;
>  	primary->pipe = pipe;
>  	primary->plane = pipe;
> +	primary->rotation = BIT(DRM_ROTATE_0);
>  	if (HAS_FBC(dev) && INTEL_INFO(dev)->gen < 4)
>  		primary->plane = !pipe;
>  
> @@ -11749,6 +11797,19 @@ static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
>  				 &intel_primary_plane_funcs,
>  				 intel_primary_formats, num_formats,
>  				 DRM_PLANE_TYPE_PRIMARY);
> +
> +	if (INTEL_INFO(dev)->gen >= 4) {
> +		if (!dev->mode_config.rotation_property)
> +			dev->mode_config.rotation_property =
> +				drm_mode_create_rotation_property(dev,
> +							BIT(DRM_ROTATE_0) |
> +							BIT(DRM_ROTATE_180));
> +		if (dev->mode_config.rotation_property)
> +			drm_object_attach_property(&primary->base.base,
> +				dev->mode_config.rotation_property,
> +				primary->rotation);
> +	}
> +
>  	return &primary->base;
>  }
>  
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index d683a20..3e5d6b3 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1093,6 +1093,9 @@ bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob);
>  int intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane);
>  void intel_flush_primary_plane(struct drm_i915_private *dev_priv,
>  			       enum plane plane);
> +int intel_plane_set_property(struct drm_plane *plane,
> +				    struct drm_property *prop,
> +				    uint64_t val);
>  int intel_plane_restore(struct drm_plane *plane);
>  void intel_plane_disable(struct drm_plane *plane);
>  int intel_sprite_set_colorkey(struct drm_device *dev, void *data,
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index c8f744c..1ab3e11 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -581,6 +581,12 @@ void intel_update_fbc(struct drm_device *dev)
>  			DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n");
>  		goto out_disable;
>  	}
> +	if (INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev) &&
> +	    to_intel_plane(crtc->primary)->rotation != BIT(DRM_ROTATE_0)) {
> +		if (set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE))
> +			DRM_DEBUG_KMS("Rotation unsupported, disabling\n");
> +		goto out_disable;
> +	}
>  
>  	/* If the kernel debugger is active, always disable compression */
>  	if (in_dbg_master())
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index 0bdb00b..be9bc21 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -1218,7 +1218,7 @@ out_unlock:
>  	return ret;
>  }
>  
> -static int intel_plane_set_property(struct drm_plane *plane,
> +int intel_plane_set_property(struct drm_plane *plane,
>  				    struct drm_property *prop,
>  				    uint64_t val)
>  {
> @@ -1249,7 +1249,7 @@ int intel_plane_restore(struct drm_plane *plane)
>  	if (!plane->crtc || !plane->fb)
>  		return 0;
>  
> -	return intel_update_plane(plane, plane->crtc, plane->fb,
> +	return plane->funcs->update_plane(plane, plane->crtc, plane->fb,
>  				  intel_plane->crtc_x, intel_plane->crtc_y,
>  				  intel_plane->crtc_w, intel_plane->crtc_h,
>  				  intel_plane->src_x, intel_plane->src_y,
> -- 
> 1.7.10.4
> 
> _______________________________________________
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> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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