diff mbox

[v2] drm/i915/glk: Refactor handling of PLANE_COLOR_CTL for GLK+

Message ID 20171103165848.23407-1-james.ausmus@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

James Ausmus Nov. 3, 2017, 4:58 p.m. UTC
Since GLK, some plane configuration settings have moved to the
PLANE_COLOR_CTL register. Refactor handling of the register to work like
PLANE_CTL. This also allows us to fix the set/read of the plane Alpha
Mode for GLK+.

v2: Adjust ordering of platform checks to be newest->oldest, drop
redundant comment about alpha blending. (Ville)

Signed-off-by: James Ausmus <james.ausmus@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h      | 12 +++++---
 drivers/gpu/drm/i915/intel_display.c | 55 ++++++++++++++++++++++++++++++++----
 drivers/gpu/drm/i915/intel_drv.h     |  5 ++++
 drivers/gpu/drm/i915/intel_sprite.c  | 14 +++++----
 4 files changed, 71 insertions(+), 15 deletions(-)

Comments

Ville Syrjälä Nov. 3, 2017, 5:31 p.m. UTC | #1
On Fri, Nov 03, 2017 at 09:58:48AM -0700, James Ausmus wrote:
> Since GLK, some plane configuration settings have moved to the
> PLANE_COLOR_CTL register. Refactor handling of the register to work like
> PLANE_CTL. This also allows us to fix the set/read of the plane Alpha
> Mode for GLK+.
> 
> v2: Adjust ordering of platform checks to be newest->oldest, drop
> redundant comment about alpha blending. (Ville)
> 
> Signed-off-by: James Ausmus <james.ausmus@intel.com>
> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/i915_reg.h      | 12 +++++---
>  drivers/gpu/drm/i915/intel_display.c | 55 ++++++++++++++++++++++++++++++++----
>  drivers/gpu/drm/i915/intel_drv.h     |  5 ++++
>  drivers/gpu/drm/i915/intel_sprite.c  | 14 +++++----
>  4 files changed, 71 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index f0f8f6059652..ecd6b236e005 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -6263,7 +6263,7 @@ enum {
>  #define _PLANE_CTL_2_A				0x70280
>  #define _PLANE_CTL_3_A				0x70380
>  #define   PLANE_CTL_ENABLE			(1 << 31)
> -#define   PLANE_CTL_PIPE_GAMMA_ENABLE		(1 << 30)
> +#define   PLANE_CTL_PIPE_GAMMA_ENABLE		(1 << 30)   /* Pre-GLK */
>  #define   PLANE_CTL_FORMAT_MASK			(0xf << 24)
>  #define   PLANE_CTL_FORMAT_YUV422		(  0 << 24)
>  #define   PLANE_CTL_FORMAT_NV12			(  1 << 24)
> @@ -6273,7 +6273,7 @@ enum {
>  #define   PLANE_CTL_FORMAT_AYUV			(  8 << 24)
>  #define   PLANE_CTL_FORMAT_INDEXED		( 12 << 24)
>  #define   PLANE_CTL_FORMAT_RGB_565		( 14 << 24)
> -#define   PLANE_CTL_PIPE_CSC_ENABLE		(1 << 23)
> +#define   PLANE_CTL_PIPE_CSC_ENABLE		(1 << 23) /* Pre-GLK */
>  #define   PLANE_CTL_KEY_ENABLE_MASK		(0x3 << 21)
>  #define   PLANE_CTL_KEY_ENABLE_SOURCE		(  1 << 21)
>  #define   PLANE_CTL_KEY_ENABLE_DESTINATION	(  2 << 21)
> @@ -6286,13 +6286,13 @@ enum {
>  #define   PLANE_CTL_YUV422_VYUY			(  3 << 16)
>  #define   PLANE_CTL_DECOMPRESSION_ENABLE	(1 << 15)
>  #define   PLANE_CTL_TRICKLE_FEED_DISABLE	(1 << 14)
> -#define   PLANE_CTL_PLANE_GAMMA_DISABLE		(1 << 13)
> +#define   PLANE_CTL_PLANE_GAMMA_DISABLE		(1 << 13) /* Pre-GLK */
>  #define   PLANE_CTL_TILED_MASK			(0x7 << 10)
>  #define   PLANE_CTL_TILED_LINEAR		(  0 << 10)
>  #define   PLANE_CTL_TILED_X			(  1 << 10)
>  #define   PLANE_CTL_TILED_Y			(  4 << 10)
>  #define   PLANE_CTL_TILED_YF			(  5 << 10)
> -#define   PLANE_CTL_ALPHA_MASK			(0x3 << 4)
> +#define   PLANE_CTL_ALPHA_MASK			(0x3 << 4) /* Pre-GLK */
>  #define   PLANE_CTL_ALPHA_DISABLE		(  0 << 4)
>  #define   PLANE_CTL_ALPHA_SW_PREMULTIPLY	(  2 << 4)
>  #define   PLANE_CTL_ALPHA_HW_PREMULTIPLY	(  3 << 4)
> @@ -6332,6 +6332,10 @@ enum {
>  #define   PLANE_COLOR_PIPE_GAMMA_ENABLE		(1 << 30)
>  #define   PLANE_COLOR_PIPE_CSC_ENABLE		(1 << 23)
>  #define   PLANE_COLOR_PLANE_GAMMA_DISABLE	(1 << 13)
> +#define   PLANE_COLOR_ALPHA_MASK		(0x3 << 4)
> +#define   PLANE_COLOR_ALPHA_DISABLE		(0 << 4)
> +#define   PLANE_COLOR_ALPHA_SW_PREMULTIPLY	(2 << 4)
> +#define   PLANE_COLOR_ALPHA_HW_PREMULTIPLY	(3 << 4)
>  #define _PLANE_BUF_CFG_1_A			0x7027c
>  #define _PLANE_BUF_CFG_2_A			0x7037c
>  #define _PLANE_NV12_BUF_CFG_1_A		0x70278
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 737de251d0f8..39453276dad1 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -3466,6 +3466,23 @@ static u32 skl_plane_ctl_format(uint32_t pixel_format)
>  	return 0;
>  }
>  
> +static u32 glk_plane_ctl_format(uint32_t pixel_format)
> +{
> +	/* GLK+ moves the alpha mask to a different register */
> +	return skl_plane_ctl_format(pixel_format) & ~PLANE_CTL_ALPHA_MASK;

I think it would be less confusing to extract the alpha stuff
from skl_plane_ctl_format() into skl_plane_ctl_alpha().

I guess with that we wouldn't even need glk_plane_ctl_format()?

> +}
> +
> +static u32 glk_plane_color_ctl_alpha(uint32_t pixel_format)
> +{
> +	switch (pixel_format) {
> +	case DRM_FORMAT_ABGR8888:
> +	case DRM_FORMAT_ARGB8888:
> +		return PLANE_COLOR_ALPHA_SW_PREMULTIPLY;
> +	default:
> +		return PLANE_COLOR_ALPHA_DISABLE;
> +	}
> +}
> +
>  static u32 skl_plane_ctl_tiling(uint64_t fb_modifier)
>  {
>  	switch (fb_modifier) {
> @@ -3522,14 +3539,16 @@ u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
>  
>  	plane_ctl = PLANE_CTL_ENABLE;
>  
> -	if (!IS_GEMINILAKE(dev_priv) && !IS_CANNONLAKE(dev_priv)) {
> +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
> +		plane_ctl |= glk_plane_ctl_format(fb->format->format);
> +	} else {
>  		plane_ctl |=
>  			PLANE_CTL_PIPE_GAMMA_ENABLE |
>  			PLANE_CTL_PIPE_CSC_ENABLE |
>  			PLANE_CTL_PLANE_GAMMA_DISABLE;
> +		plane_ctl |= skl_plane_ctl_format(fb->format->format);
>  	}
>  
> -	plane_ctl |= skl_plane_ctl_format(fb->format->format);
>  	plane_ctl |= skl_plane_ctl_tiling(fb->modifier);
>  	plane_ctl |= skl_plane_ctl_rotation(rotation);
>  
> @@ -3541,6 +3560,20 @@ u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
>  	return plane_ctl;
>  }
>  
> +u32 glk_plane_color_ctl(const struct intel_crtc_state *crtc_state,
> +			const struct intel_plane_state *plane_state)
> +{
> +	const struct drm_framebuffer *fb = plane_state->base.fb;
> +	u32 plane_color_ctl = 0;
> +
> +	plane_color_ctl |= PLANE_COLOR_PIPE_GAMMA_ENABLE;
> +	plane_color_ctl |= PLANE_COLOR_PIPE_CSC_ENABLE;
> +	plane_color_ctl |= PLANE_COLOR_PLANE_GAMMA_DISABLE;
> +	plane_color_ctl |= glk_plane_color_ctl_alpha(fb->format->format);
> +
> +	return plane_color_ctl;
> +}
> +
>  static int
>  __intel_display_resume(struct drm_device *dev,
>  		       struct drm_atomic_state *state,
> @@ -8426,7 +8459,7 @@ skylake_get_initial_plane_config(struct intel_crtc *crtc,
>  {
>  	struct drm_device *dev = crtc->base.dev;
>  	struct drm_i915_private *dev_priv = to_i915(dev);
> -	u32 val, base, offset, stride_mult, tiling;
> +	u32 val, base, offset, stride_mult, tiling, alpha;
>  	int pipe = crtc->pipe;
>  	int fourcc, pixel_format;
>  	unsigned int aligned_height;
> @@ -8448,9 +8481,16 @@ skylake_get_initial_plane_config(struct intel_crtc *crtc,
>  		goto error;
>  
>  	pixel_format = val & PLANE_CTL_FORMAT_MASK;
> +
> +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
> +		alpha = I915_READ(PLANE_COLOR_CTL(pipe, 0));
> +		alpha &= PLANE_COLOR_ALPHA_MASK;
> +	} else {
> +		alpha = val & PLANE_CTL_ALPHA_MASK;
> +	}
> +
>  	fourcc = skl_format_to_fourcc(pixel_format,
> -				      val & PLANE_CTL_ORDER_RGBX,
> -				      val & PLANE_CTL_ALPHA_MASK);
> +				      val & PLANE_CTL_ORDER_RGBX, alpha);
>  	fb->format = drm_format_info(fourcc);
>  
>  	tiling = val & PLANE_CTL_TILED_MASK;
> @@ -12831,6 +12871,11 @@ intel_check_primary_plane(struct intel_plane *plane,
>  		state->ctl = i9xx_plane_ctl(crtc_state, state);
>  	}
>  
> +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
> +		state->color_ctl = glk_plane_color_ctl(crtc_state, state);
> +	else
> +		state->color_ctl = 0;

The else branch doesn't seem necessary since we never use color_ctl
on other platforms.

> +
>  	return 0;
>  }
>  
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 00b488688042..92bc1325701b 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -425,6 +425,9 @@ struct intel_plane_state {
>  	/* plane control register */
>  	u32 ctl;
>  
> +	/* plane color control register */
> +	u32 color_ctl;
> +
>  	/*
>  	 * scaler_id
>  	 *    = -1 : not using a scaler
> @@ -1504,6 +1507,8 @@ static inline u32 intel_plane_ggtt_offset(const struct intel_plane_state *state)
>  	return i915_ggtt_offset(state->vma);
>  }
>  
> +u32 glk_plane_color_ctl(const struct intel_crtc_state *crtc_state,
> +			const struct intel_plane_state *plane_state);
>  u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
>  		  const struct intel_plane_state *plane_state);
>  u32 skl_plane_stride(const struct drm_framebuffer *fb, int plane,
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index 4fcf80ca91dd..18b9c98bc802 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -240,6 +240,7 @@ skl_update_plane(struct intel_plane *plane,
>  	enum plane_id plane_id = plane->id;
>  	enum pipe pipe = plane->pipe;
>  	u32 plane_ctl = plane_state->ctl;
> +	u32 plane_color_ctl = plane_state->color_ctl;

Having a local variable for this seems rather pointless. Probably
you could do a patch to nuke the local variables for the control
register as well, for all platforms.

Another thing I think we should do is move most of the primary plane
stuff from intel_display.c to intel_sprite.c, and rename intel_sprite.c
to intel_plane.c. Would allow us to make more things static, and
it would shrink intel_display.c a little bit.

>  	const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
>  	u32 surf_addr = plane_state->main.offset;
>  	unsigned int rotation = plane_state->base.rotation;
> @@ -263,13 +264,9 @@ skl_update_plane(struct intel_plane *plane,
>  
>  	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
>  
> -	if (IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) {
> +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
>  		I915_WRITE_FW(PLANE_COLOR_CTL(pipe, plane_id),
> -			      PLANE_COLOR_PIPE_GAMMA_ENABLE |
> -			      PLANE_COLOR_PIPE_CSC_ENABLE |
> -			      PLANE_COLOR_PLANE_GAMMA_DISABLE);
> -	}
> -
> +			      plane_color_ctl);
>  	if (key->flags) {
>  		I915_WRITE_FW(PLANE_KEYVAL(pipe, plane_id), key->min_value);
>  		I915_WRITE_FW(PLANE_KEYMAX(pipe, plane_id), key->max_value);
> @@ -978,6 +975,11 @@ intel_check_sprite_plane(struct intel_plane *plane,
>  		state->ctl = g4x_sprite_ctl(crtc_state, state);
>  	}
>  
> +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
> +		state->color_ctl = glk_plane_color_ctl(crtc_state, state);
> +	else
> +		state->color_ctl = 0;

No need for the else here either.

> +
>  	return 0;
>  }
>  
> -- 
> 2.14.1
James Ausmus Nov. 3, 2017, 5:45 p.m. UTC | #2
On Fri, Nov 03, 2017 at 07:31:44PM +0200, Ville Syrjälä wrote:
> On Fri, Nov 03, 2017 at 09:58:48AM -0700, James Ausmus wrote:
> > Since GLK, some plane configuration settings have moved to the
> > PLANE_COLOR_CTL register. Refactor handling of the register to work like
> > PLANE_CTL. This also allows us to fix the set/read of the plane Alpha
> > Mode for GLK+.
> > 
> > v2: Adjust ordering of platform checks to be newest->oldest, drop
> > redundant comment about alpha blending. (Ville)
> > 
> > Signed-off-by: James Ausmus <james.ausmus@intel.com>
> > Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> > Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > ---
> >  drivers/gpu/drm/i915/i915_reg.h      | 12 +++++---
> >  drivers/gpu/drm/i915/intel_display.c | 55 ++++++++++++++++++++++++++++++++----
> >  drivers/gpu/drm/i915/intel_drv.h     |  5 ++++
> >  drivers/gpu/drm/i915/intel_sprite.c  | 14 +++++----
> >  4 files changed, 71 insertions(+), 15 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> > index f0f8f6059652..ecd6b236e005 100644
> > --- a/drivers/gpu/drm/i915/i915_reg.h
> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > @@ -6263,7 +6263,7 @@ enum {
> >  #define _PLANE_CTL_2_A				0x70280
> >  #define _PLANE_CTL_3_A				0x70380
> >  #define   PLANE_CTL_ENABLE			(1 << 31)
> > -#define   PLANE_CTL_PIPE_GAMMA_ENABLE		(1 << 30)
> > +#define   PLANE_CTL_PIPE_GAMMA_ENABLE		(1 << 30)   /* Pre-GLK */
> >  #define   PLANE_CTL_FORMAT_MASK			(0xf << 24)
> >  #define   PLANE_CTL_FORMAT_YUV422		(  0 << 24)
> >  #define   PLANE_CTL_FORMAT_NV12			(  1 << 24)
> > @@ -6273,7 +6273,7 @@ enum {
> >  #define   PLANE_CTL_FORMAT_AYUV			(  8 << 24)
> >  #define   PLANE_CTL_FORMAT_INDEXED		( 12 << 24)
> >  #define   PLANE_CTL_FORMAT_RGB_565		( 14 << 24)
> > -#define   PLANE_CTL_PIPE_CSC_ENABLE		(1 << 23)
> > +#define   PLANE_CTL_PIPE_CSC_ENABLE		(1 << 23) /* Pre-GLK */
> >  #define   PLANE_CTL_KEY_ENABLE_MASK		(0x3 << 21)
> >  #define   PLANE_CTL_KEY_ENABLE_SOURCE		(  1 << 21)
> >  #define   PLANE_CTL_KEY_ENABLE_DESTINATION	(  2 << 21)
> > @@ -6286,13 +6286,13 @@ enum {
> >  #define   PLANE_CTL_YUV422_VYUY			(  3 << 16)
> >  #define   PLANE_CTL_DECOMPRESSION_ENABLE	(1 << 15)
> >  #define   PLANE_CTL_TRICKLE_FEED_DISABLE	(1 << 14)
> > -#define   PLANE_CTL_PLANE_GAMMA_DISABLE		(1 << 13)
> > +#define   PLANE_CTL_PLANE_GAMMA_DISABLE		(1 << 13) /* Pre-GLK */
> >  #define   PLANE_CTL_TILED_MASK			(0x7 << 10)
> >  #define   PLANE_CTL_TILED_LINEAR		(  0 << 10)
> >  #define   PLANE_CTL_TILED_X			(  1 << 10)
> >  #define   PLANE_CTL_TILED_Y			(  4 << 10)
> >  #define   PLANE_CTL_TILED_YF			(  5 << 10)
> > -#define   PLANE_CTL_ALPHA_MASK			(0x3 << 4)
> > +#define   PLANE_CTL_ALPHA_MASK			(0x3 << 4) /* Pre-GLK */
> >  #define   PLANE_CTL_ALPHA_DISABLE		(  0 << 4)
> >  #define   PLANE_CTL_ALPHA_SW_PREMULTIPLY	(  2 << 4)
> >  #define   PLANE_CTL_ALPHA_HW_PREMULTIPLY	(  3 << 4)
> > @@ -6332,6 +6332,10 @@ enum {
> >  #define   PLANE_COLOR_PIPE_GAMMA_ENABLE		(1 << 30)
> >  #define   PLANE_COLOR_PIPE_CSC_ENABLE		(1 << 23)
> >  #define   PLANE_COLOR_PLANE_GAMMA_DISABLE	(1 << 13)
> > +#define   PLANE_COLOR_ALPHA_MASK		(0x3 << 4)
> > +#define   PLANE_COLOR_ALPHA_DISABLE		(0 << 4)
> > +#define   PLANE_COLOR_ALPHA_SW_PREMULTIPLY	(2 << 4)
> > +#define   PLANE_COLOR_ALPHA_HW_PREMULTIPLY	(3 << 4)
> >  #define _PLANE_BUF_CFG_1_A			0x7027c
> >  #define _PLANE_BUF_CFG_2_A			0x7037c
> >  #define _PLANE_NV12_BUF_CFG_1_A		0x70278
> > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> > index 737de251d0f8..39453276dad1 100644
> > --- a/drivers/gpu/drm/i915/intel_display.c
> > +++ b/drivers/gpu/drm/i915/intel_display.c
> > @@ -3466,6 +3466,23 @@ static u32 skl_plane_ctl_format(uint32_t pixel_format)
> >  	return 0;
> >  }
> >  
> > +static u32 glk_plane_ctl_format(uint32_t pixel_format)
> > +{
> > +	/* GLK+ moves the alpha mask to a different register */
> > +	return skl_plane_ctl_format(pixel_format) & ~PLANE_CTL_ALPHA_MASK;
> 
> I think it would be less confusing to extract the alpha stuff
> from skl_plane_ctl_format() into skl_plane_ctl_alpha().
> 
> I guess with that we wouldn't even need glk_plane_ctl_format()?

Yeah, I like that better. As a matter of fact, the mask and definitions
are the same between PLANE_CTL and PLANE_COLOR_CTL - would it be cleaner
to just rename the defines to PLANE_ALPHA_*, name the function
skl_plane_alpha, and then be able to use the single function for both
PLANE_CTL and PLANE_COLOR_CTL usages?

> 
> > +}
> > +
> > +static u32 glk_plane_color_ctl_alpha(uint32_t pixel_format)
> > +{
> > +	switch (pixel_format) {
> > +	case DRM_FORMAT_ABGR8888:
> > +	case DRM_FORMAT_ARGB8888:
> > +		return PLANE_COLOR_ALPHA_SW_PREMULTIPLY;
> > +	default:
> > +		return PLANE_COLOR_ALPHA_DISABLE;
> > +	}
> > +}
> > +
> >  static u32 skl_plane_ctl_tiling(uint64_t fb_modifier)
> >  {
> >  	switch (fb_modifier) {
> > @@ -3522,14 +3539,16 @@ u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
> >  
> >  	plane_ctl = PLANE_CTL_ENABLE;
> >  
> > -	if (!IS_GEMINILAKE(dev_priv) && !IS_CANNONLAKE(dev_priv)) {
> > +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
> > +		plane_ctl |= glk_plane_ctl_format(fb->format->format);
> > +	} else {
> >  		plane_ctl |=
> >  			PLANE_CTL_PIPE_GAMMA_ENABLE |
> >  			PLANE_CTL_PIPE_CSC_ENABLE |
> >  			PLANE_CTL_PLANE_GAMMA_DISABLE;
> > +		plane_ctl |= skl_plane_ctl_format(fb->format->format);
> >  	}
> >  
> > -	plane_ctl |= skl_plane_ctl_format(fb->format->format);
> >  	plane_ctl |= skl_plane_ctl_tiling(fb->modifier);
> >  	plane_ctl |= skl_plane_ctl_rotation(rotation);
> >  
> > @@ -3541,6 +3560,20 @@ u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
> >  	return plane_ctl;
> >  }
> >  
> > +u32 glk_plane_color_ctl(const struct intel_crtc_state *crtc_state,
> > +			const struct intel_plane_state *plane_state)
> > +{
> > +	const struct drm_framebuffer *fb = plane_state->base.fb;
> > +	u32 plane_color_ctl = 0;
> > +
> > +	plane_color_ctl |= PLANE_COLOR_PIPE_GAMMA_ENABLE;
> > +	plane_color_ctl |= PLANE_COLOR_PIPE_CSC_ENABLE;
> > +	plane_color_ctl |= PLANE_COLOR_PLANE_GAMMA_DISABLE;
> > +	plane_color_ctl |= glk_plane_color_ctl_alpha(fb->format->format);
> > +
> > +	return plane_color_ctl;
> > +}
> > +
> >  static int
> >  __intel_display_resume(struct drm_device *dev,
> >  		       struct drm_atomic_state *state,
> > @@ -8426,7 +8459,7 @@ skylake_get_initial_plane_config(struct intel_crtc *crtc,
> >  {
> >  	struct drm_device *dev = crtc->base.dev;
> >  	struct drm_i915_private *dev_priv = to_i915(dev);
> > -	u32 val, base, offset, stride_mult, tiling;
> > +	u32 val, base, offset, stride_mult, tiling, alpha;
> >  	int pipe = crtc->pipe;
> >  	int fourcc, pixel_format;
> >  	unsigned int aligned_height;
> > @@ -8448,9 +8481,16 @@ skylake_get_initial_plane_config(struct intel_crtc *crtc,
> >  		goto error;
> >  
> >  	pixel_format = val & PLANE_CTL_FORMAT_MASK;
> > +
> > +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
> > +		alpha = I915_READ(PLANE_COLOR_CTL(pipe, 0));
> > +		alpha &= PLANE_COLOR_ALPHA_MASK;
> > +	} else {
> > +		alpha = val & PLANE_CTL_ALPHA_MASK;
> > +	}
> > +
> >  	fourcc = skl_format_to_fourcc(pixel_format,
> > -				      val & PLANE_CTL_ORDER_RGBX,
> > -				      val & PLANE_CTL_ALPHA_MASK);
> > +				      val & PLANE_CTL_ORDER_RGBX, alpha);
> >  	fb->format = drm_format_info(fourcc);
> >  
> >  	tiling = val & PLANE_CTL_TILED_MASK;
> > @@ -12831,6 +12871,11 @@ intel_check_primary_plane(struct intel_plane *plane,
> >  		state->ctl = i9xx_plane_ctl(crtc_state, state);
> >  	}
> >  
> > +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
> > +		state->color_ctl = glk_plane_color_ctl(crtc_state, state);
> > +	else
> > +		state->color_ctl = 0;
> 
> The else branch doesn't seem necessary since we never use color_ctl
> on other platforms.

OK - wasn't sure if it was better to leave it uninitialized since it's
not used, or uselessly initialize it. :)

> 
> > +
> >  	return 0;
> >  }
> >  
> > diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> > index 00b488688042..92bc1325701b 100644
> > --- a/drivers/gpu/drm/i915/intel_drv.h
> > +++ b/drivers/gpu/drm/i915/intel_drv.h
> > @@ -425,6 +425,9 @@ struct intel_plane_state {
> >  	/* plane control register */
> >  	u32 ctl;
> >  
> > +	/* plane color control register */
> > +	u32 color_ctl;
> > +
> >  	/*
> >  	 * scaler_id
> >  	 *    = -1 : not using a scaler
> > @@ -1504,6 +1507,8 @@ static inline u32 intel_plane_ggtt_offset(const struct intel_plane_state *state)
> >  	return i915_ggtt_offset(state->vma);
> >  }
> >  
> > +u32 glk_plane_color_ctl(const struct intel_crtc_state *crtc_state,
> > +			const struct intel_plane_state *plane_state);
> >  u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
> >  		  const struct intel_plane_state *plane_state);
> >  u32 skl_plane_stride(const struct drm_framebuffer *fb, int plane,
> > diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> > index 4fcf80ca91dd..18b9c98bc802 100644
> > --- a/drivers/gpu/drm/i915/intel_sprite.c
> > +++ b/drivers/gpu/drm/i915/intel_sprite.c
> > @@ -240,6 +240,7 @@ skl_update_plane(struct intel_plane *plane,
> >  	enum plane_id plane_id = plane->id;
> >  	enum pipe pipe = plane->pipe;
> >  	u32 plane_ctl = plane_state->ctl;
> > +	u32 plane_color_ctl = plane_state->color_ctl;
> 
> Having a local variable for this seems rather pointless. Probably
> you could do a patch to nuke the local variables for the control
> register as well, for all platforms.

I'll drop the new local, and follow up with a patch to drop plane_ctl as
well.

> 
> Another thing I think we should do is move most of the primary plane
> stuff from intel_display.c to intel_sprite.c, and rename intel_sprite.c
> to intel_plane.c. Would allow us to make more things static, and
> it would shrink intel_display.c a little bit.

Sounds good - I'll throw it on my TODO, unless someone else wants to get
to it before me. :)

> 
> >  	const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
> >  	u32 surf_addr = plane_state->main.offset;
> >  	unsigned int rotation = plane_state->base.rotation;
> > @@ -263,13 +264,9 @@ skl_update_plane(struct intel_plane *plane,
> >  
> >  	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
> >  
> > -	if (IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) {
> > +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
> >  		I915_WRITE_FW(PLANE_COLOR_CTL(pipe, plane_id),
> > -			      PLANE_COLOR_PIPE_GAMMA_ENABLE |
> > -			      PLANE_COLOR_PIPE_CSC_ENABLE |
> > -			      PLANE_COLOR_PLANE_GAMMA_DISABLE);
> > -	}
> > -
> > +			      plane_color_ctl);
> >  	if (key->flags) {
> >  		I915_WRITE_FW(PLANE_KEYVAL(pipe, plane_id), key->min_value);
> >  		I915_WRITE_FW(PLANE_KEYMAX(pipe, plane_id), key->max_value);
> > @@ -978,6 +975,11 @@ intel_check_sprite_plane(struct intel_plane *plane,
> >  		state->ctl = g4x_sprite_ctl(crtc_state, state);
> >  	}
> >  
> > +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
> > +		state->color_ctl = glk_plane_color_ctl(crtc_state, state);
> > +	else
> > +		state->color_ctl = 0;
> 
> No need for the else here either.

ACK


Thanks for the review!

-James

> 
> > +
> >  	return 0;
> >  }
> >  
> > -- 
> > 2.14.1
> 
> -- 
> Ville Syrjälä
> Intel OTC
Ville Syrjälä Nov. 3, 2017, 5:59 p.m. UTC | #3
On Fri, Nov 03, 2017 at 10:45:30AM -0700, James Ausmus wrote:
> On Fri, Nov 03, 2017 at 07:31:44PM +0200, Ville Syrjälä wrote:
> > On Fri, Nov 03, 2017 at 09:58:48AM -0700, James Ausmus wrote:
> > > Since GLK, some plane configuration settings have moved to the
> > > PLANE_COLOR_CTL register. Refactor handling of the register to work like
> > > PLANE_CTL. This also allows us to fix the set/read of the plane Alpha
> > > Mode for GLK+.
> > > 
> > > v2: Adjust ordering of platform checks to be newest->oldest, drop
> > > redundant comment about alpha blending. (Ville)
> > > 
> > > Signed-off-by: James Ausmus <james.ausmus@intel.com>
> > > Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> > > Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > > ---
> > >  drivers/gpu/drm/i915/i915_reg.h      | 12 +++++---
> > >  drivers/gpu/drm/i915/intel_display.c | 55 ++++++++++++++++++++++++++++++++----
> > >  drivers/gpu/drm/i915/intel_drv.h     |  5 ++++
> > >  drivers/gpu/drm/i915/intel_sprite.c  | 14 +++++----
> > >  4 files changed, 71 insertions(+), 15 deletions(-)
> > > 
> > > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> > > index f0f8f6059652..ecd6b236e005 100644
> > > --- a/drivers/gpu/drm/i915/i915_reg.h
> > > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > > @@ -6263,7 +6263,7 @@ enum {
> > >  #define _PLANE_CTL_2_A				0x70280
> > >  #define _PLANE_CTL_3_A				0x70380
> > >  #define   PLANE_CTL_ENABLE			(1 << 31)
> > > -#define   PLANE_CTL_PIPE_GAMMA_ENABLE		(1 << 30)
> > > +#define   PLANE_CTL_PIPE_GAMMA_ENABLE		(1 << 30)   /* Pre-GLK */
> > >  #define   PLANE_CTL_FORMAT_MASK			(0xf << 24)
> > >  #define   PLANE_CTL_FORMAT_YUV422		(  0 << 24)
> > >  #define   PLANE_CTL_FORMAT_NV12			(  1 << 24)
> > > @@ -6273,7 +6273,7 @@ enum {
> > >  #define   PLANE_CTL_FORMAT_AYUV			(  8 << 24)
> > >  #define   PLANE_CTL_FORMAT_INDEXED		( 12 << 24)
> > >  #define   PLANE_CTL_FORMAT_RGB_565		( 14 << 24)
> > > -#define   PLANE_CTL_PIPE_CSC_ENABLE		(1 << 23)
> > > +#define   PLANE_CTL_PIPE_CSC_ENABLE		(1 << 23) /* Pre-GLK */
> > >  #define   PLANE_CTL_KEY_ENABLE_MASK		(0x3 << 21)
> > >  #define   PLANE_CTL_KEY_ENABLE_SOURCE		(  1 << 21)
> > >  #define   PLANE_CTL_KEY_ENABLE_DESTINATION	(  2 << 21)
> > > @@ -6286,13 +6286,13 @@ enum {
> > >  #define   PLANE_CTL_YUV422_VYUY			(  3 << 16)
> > >  #define   PLANE_CTL_DECOMPRESSION_ENABLE	(1 << 15)
> > >  #define   PLANE_CTL_TRICKLE_FEED_DISABLE	(1 << 14)
> > > -#define   PLANE_CTL_PLANE_GAMMA_DISABLE		(1 << 13)
> > > +#define   PLANE_CTL_PLANE_GAMMA_DISABLE		(1 << 13) /* Pre-GLK */
> > >  #define   PLANE_CTL_TILED_MASK			(0x7 << 10)
> > >  #define   PLANE_CTL_TILED_LINEAR		(  0 << 10)
> > >  #define   PLANE_CTL_TILED_X			(  1 << 10)
> > >  #define   PLANE_CTL_TILED_Y			(  4 << 10)
> > >  #define   PLANE_CTL_TILED_YF			(  5 << 10)
> > > -#define   PLANE_CTL_ALPHA_MASK			(0x3 << 4)
> > > +#define   PLANE_CTL_ALPHA_MASK			(0x3 << 4) /* Pre-GLK */
> > >  #define   PLANE_CTL_ALPHA_DISABLE		(  0 << 4)
> > >  #define   PLANE_CTL_ALPHA_SW_PREMULTIPLY	(  2 << 4)
> > >  #define   PLANE_CTL_ALPHA_HW_PREMULTIPLY	(  3 << 4)
> > > @@ -6332,6 +6332,10 @@ enum {
> > >  #define   PLANE_COLOR_PIPE_GAMMA_ENABLE		(1 << 30)
> > >  #define   PLANE_COLOR_PIPE_CSC_ENABLE		(1 << 23)
> > >  #define   PLANE_COLOR_PLANE_GAMMA_DISABLE	(1 << 13)
> > > +#define   PLANE_COLOR_ALPHA_MASK		(0x3 << 4)
> > > +#define   PLANE_COLOR_ALPHA_DISABLE		(0 << 4)
> > > +#define   PLANE_COLOR_ALPHA_SW_PREMULTIPLY	(2 << 4)
> > > +#define   PLANE_COLOR_ALPHA_HW_PREMULTIPLY	(3 << 4)
> > >  #define _PLANE_BUF_CFG_1_A			0x7027c
> > >  #define _PLANE_BUF_CFG_2_A			0x7037c
> > >  #define _PLANE_NV12_BUF_CFG_1_A		0x70278
> > > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> > > index 737de251d0f8..39453276dad1 100644
> > > --- a/drivers/gpu/drm/i915/intel_display.c
> > > +++ b/drivers/gpu/drm/i915/intel_display.c
> > > @@ -3466,6 +3466,23 @@ static u32 skl_plane_ctl_format(uint32_t pixel_format)
> > >  	return 0;
> > >  }
> > >  
> > > +static u32 glk_plane_ctl_format(uint32_t pixel_format)
> > > +{
> > > +	/* GLK+ moves the alpha mask to a different register */
> > > +	return skl_plane_ctl_format(pixel_format) & ~PLANE_CTL_ALPHA_MASK;
> > 
> > I think it would be less confusing to extract the alpha stuff
> > from skl_plane_ctl_format() into skl_plane_ctl_alpha().
> > 
> > I guess with that we wouldn't even need glk_plane_ctl_format()?
> 
> Yeah, I like that better. As a matter of fact, the mask and definitions
> are the same between PLANE_CTL and PLANE_COLOR_CTL - would it be cleaner
> to just rename the defines to PLANE_ALPHA_*, name the function
> skl_plane_alpha, and then be able to use the single function for both
> PLANE_CTL and PLANE_COLOR_CTL usages?

Probably not. At least I was scratching my head again recently with
the DDI_PORT_WIDTH() defines which get used with two otherwise totally
different registers. I cooked up a patch to duplicate the defines to
make sure I won't have to be confused again. Didn't send those out yet
though.

> 
> > 
> > > +}
> > > +
> > > +static u32 glk_plane_color_ctl_alpha(uint32_t pixel_format)
> > > +{
> > > +	switch (pixel_format) {
> > > +	case DRM_FORMAT_ABGR8888:
> > > +	case DRM_FORMAT_ARGB8888:
> > > +		return PLANE_COLOR_ALPHA_SW_PREMULTIPLY;
> > > +	default:
> > > +		return PLANE_COLOR_ALPHA_DISABLE;
> > > +	}
> > > +}
> > > +
> > >  static u32 skl_plane_ctl_tiling(uint64_t fb_modifier)
> > >  {
> > >  	switch (fb_modifier) {
> > > @@ -3522,14 +3539,16 @@ u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
> > >  
> > >  	plane_ctl = PLANE_CTL_ENABLE;
> > >  
> > > -	if (!IS_GEMINILAKE(dev_priv) && !IS_CANNONLAKE(dev_priv)) {
> > > +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
> > > +		plane_ctl |= glk_plane_ctl_format(fb->format->format);
> > > +	} else {
> > >  		plane_ctl |=
> > >  			PLANE_CTL_PIPE_GAMMA_ENABLE |
> > >  			PLANE_CTL_PIPE_CSC_ENABLE |
> > >  			PLANE_CTL_PLANE_GAMMA_DISABLE;
> > > +		plane_ctl |= skl_plane_ctl_format(fb->format->format);
> > >  	}
> > >  
> > > -	plane_ctl |= skl_plane_ctl_format(fb->format->format);
> > >  	plane_ctl |= skl_plane_ctl_tiling(fb->modifier);
> > >  	plane_ctl |= skl_plane_ctl_rotation(rotation);
> > >  
> > > @@ -3541,6 +3560,20 @@ u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
> > >  	return plane_ctl;
> > >  }
> > >  
> > > +u32 glk_plane_color_ctl(const struct intel_crtc_state *crtc_state,
> > > +			const struct intel_plane_state *plane_state)
> > > +{
> > > +	const struct drm_framebuffer *fb = plane_state->base.fb;
> > > +	u32 plane_color_ctl = 0;
> > > +
> > > +	plane_color_ctl |= PLANE_COLOR_PIPE_GAMMA_ENABLE;
> > > +	plane_color_ctl |= PLANE_COLOR_PIPE_CSC_ENABLE;
> > > +	plane_color_ctl |= PLANE_COLOR_PLANE_GAMMA_DISABLE;
> > > +	plane_color_ctl |= glk_plane_color_ctl_alpha(fb->format->format);
> > > +
> > > +	return plane_color_ctl;
> > > +}
> > > +
> > >  static int
> > >  __intel_display_resume(struct drm_device *dev,
> > >  		       struct drm_atomic_state *state,
> > > @@ -8426,7 +8459,7 @@ skylake_get_initial_plane_config(struct intel_crtc *crtc,
> > >  {
> > >  	struct drm_device *dev = crtc->base.dev;
> > >  	struct drm_i915_private *dev_priv = to_i915(dev);
> > > -	u32 val, base, offset, stride_mult, tiling;
> > > +	u32 val, base, offset, stride_mult, tiling, alpha;
> > >  	int pipe = crtc->pipe;
> > >  	int fourcc, pixel_format;
> > >  	unsigned int aligned_height;
> > > @@ -8448,9 +8481,16 @@ skylake_get_initial_plane_config(struct intel_crtc *crtc,
> > >  		goto error;
> > >  
> > >  	pixel_format = val & PLANE_CTL_FORMAT_MASK;
> > > +
> > > +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
> > > +		alpha = I915_READ(PLANE_COLOR_CTL(pipe, 0));
> > > +		alpha &= PLANE_COLOR_ALPHA_MASK;
> > > +	} else {
> > > +		alpha = val & PLANE_CTL_ALPHA_MASK;
> > > +	}
> > > +
> > >  	fourcc = skl_format_to_fourcc(pixel_format,
> > > -				      val & PLANE_CTL_ORDER_RGBX,
> > > -				      val & PLANE_CTL_ALPHA_MASK);
> > > +				      val & PLANE_CTL_ORDER_RGBX, alpha);
> > >  	fb->format = drm_format_info(fourcc);
> > >  
> > >  	tiling = val & PLANE_CTL_TILED_MASK;
> > > @@ -12831,6 +12871,11 @@ intel_check_primary_plane(struct intel_plane *plane,
> > >  		state->ctl = i9xx_plane_ctl(crtc_state, state);
> > >  	}
> > >  
> > > +	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
> > > +		state->color_ctl = glk_plane_color_ctl(crtc_state, state);
> > > +	else
> > > +		state->color_ctl = 0;
> > 
> > The else branch doesn't seem necessary since we never use color_ctl
> > on other platforms.
> 
> OK - wasn't sure if it was better to leave it uninitialized since it's
> not used, or uselessly initialize it. :)

We zero initialize most things we allocate, and depend on that fact
elsewhere as well.
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f0f8f6059652..ecd6b236e005 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6263,7 +6263,7 @@  enum {
 #define _PLANE_CTL_2_A				0x70280
 #define _PLANE_CTL_3_A				0x70380
 #define   PLANE_CTL_ENABLE			(1 << 31)
-#define   PLANE_CTL_PIPE_GAMMA_ENABLE		(1 << 30)
+#define   PLANE_CTL_PIPE_GAMMA_ENABLE		(1 << 30)   /* Pre-GLK */
 #define   PLANE_CTL_FORMAT_MASK			(0xf << 24)
 #define   PLANE_CTL_FORMAT_YUV422		(  0 << 24)
 #define   PLANE_CTL_FORMAT_NV12			(  1 << 24)
@@ -6273,7 +6273,7 @@  enum {
 #define   PLANE_CTL_FORMAT_AYUV			(  8 << 24)
 #define   PLANE_CTL_FORMAT_INDEXED		( 12 << 24)
 #define   PLANE_CTL_FORMAT_RGB_565		( 14 << 24)
-#define   PLANE_CTL_PIPE_CSC_ENABLE		(1 << 23)
+#define   PLANE_CTL_PIPE_CSC_ENABLE		(1 << 23) /* Pre-GLK */
 #define   PLANE_CTL_KEY_ENABLE_MASK		(0x3 << 21)
 #define   PLANE_CTL_KEY_ENABLE_SOURCE		(  1 << 21)
 #define   PLANE_CTL_KEY_ENABLE_DESTINATION	(  2 << 21)
@@ -6286,13 +6286,13 @@  enum {
 #define   PLANE_CTL_YUV422_VYUY			(  3 << 16)
 #define   PLANE_CTL_DECOMPRESSION_ENABLE	(1 << 15)
 #define   PLANE_CTL_TRICKLE_FEED_DISABLE	(1 << 14)
-#define   PLANE_CTL_PLANE_GAMMA_DISABLE		(1 << 13)
+#define   PLANE_CTL_PLANE_GAMMA_DISABLE		(1 << 13) /* Pre-GLK */
 #define   PLANE_CTL_TILED_MASK			(0x7 << 10)
 #define   PLANE_CTL_TILED_LINEAR		(  0 << 10)
 #define   PLANE_CTL_TILED_X			(  1 << 10)
 #define   PLANE_CTL_TILED_Y			(  4 << 10)
 #define   PLANE_CTL_TILED_YF			(  5 << 10)
-#define   PLANE_CTL_ALPHA_MASK			(0x3 << 4)
+#define   PLANE_CTL_ALPHA_MASK			(0x3 << 4) /* Pre-GLK */
 #define   PLANE_CTL_ALPHA_DISABLE		(  0 << 4)
 #define   PLANE_CTL_ALPHA_SW_PREMULTIPLY	(  2 << 4)
 #define   PLANE_CTL_ALPHA_HW_PREMULTIPLY	(  3 << 4)
@@ -6332,6 +6332,10 @@  enum {
 #define   PLANE_COLOR_PIPE_GAMMA_ENABLE		(1 << 30)
 #define   PLANE_COLOR_PIPE_CSC_ENABLE		(1 << 23)
 #define   PLANE_COLOR_PLANE_GAMMA_DISABLE	(1 << 13)
+#define   PLANE_COLOR_ALPHA_MASK		(0x3 << 4)
+#define   PLANE_COLOR_ALPHA_DISABLE		(0 << 4)
+#define   PLANE_COLOR_ALPHA_SW_PREMULTIPLY	(2 << 4)
+#define   PLANE_COLOR_ALPHA_HW_PREMULTIPLY	(3 << 4)
 #define _PLANE_BUF_CFG_1_A			0x7027c
 #define _PLANE_BUF_CFG_2_A			0x7037c
 #define _PLANE_NV12_BUF_CFG_1_A		0x70278
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 737de251d0f8..39453276dad1 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3466,6 +3466,23 @@  static u32 skl_plane_ctl_format(uint32_t pixel_format)
 	return 0;
 }
 
+static u32 glk_plane_ctl_format(uint32_t pixel_format)
+{
+	/* GLK+ moves the alpha mask to a different register */
+	return skl_plane_ctl_format(pixel_format) & ~PLANE_CTL_ALPHA_MASK;
+}
+
+static u32 glk_plane_color_ctl_alpha(uint32_t pixel_format)
+{
+	switch (pixel_format) {
+	case DRM_FORMAT_ABGR8888:
+	case DRM_FORMAT_ARGB8888:
+		return PLANE_COLOR_ALPHA_SW_PREMULTIPLY;
+	default:
+		return PLANE_COLOR_ALPHA_DISABLE;
+	}
+}
+
 static u32 skl_plane_ctl_tiling(uint64_t fb_modifier)
 {
 	switch (fb_modifier) {
@@ -3522,14 +3539,16 @@  u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
 
 	plane_ctl = PLANE_CTL_ENABLE;
 
-	if (!IS_GEMINILAKE(dev_priv) && !IS_CANNONLAKE(dev_priv)) {
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
+		plane_ctl |= glk_plane_ctl_format(fb->format->format);
+	} else {
 		plane_ctl |=
 			PLANE_CTL_PIPE_GAMMA_ENABLE |
 			PLANE_CTL_PIPE_CSC_ENABLE |
 			PLANE_CTL_PLANE_GAMMA_DISABLE;
+		plane_ctl |= skl_plane_ctl_format(fb->format->format);
 	}
 
-	plane_ctl |= skl_plane_ctl_format(fb->format->format);
 	plane_ctl |= skl_plane_ctl_tiling(fb->modifier);
 	plane_ctl |= skl_plane_ctl_rotation(rotation);
 
@@ -3541,6 +3560,20 @@  u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
 	return plane_ctl;
 }
 
+u32 glk_plane_color_ctl(const struct intel_crtc_state *crtc_state,
+			const struct intel_plane_state *plane_state)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	u32 plane_color_ctl = 0;
+
+	plane_color_ctl |= PLANE_COLOR_PIPE_GAMMA_ENABLE;
+	plane_color_ctl |= PLANE_COLOR_PIPE_CSC_ENABLE;
+	plane_color_ctl |= PLANE_COLOR_PLANE_GAMMA_DISABLE;
+	plane_color_ctl |= glk_plane_color_ctl_alpha(fb->format->format);
+
+	return plane_color_ctl;
+}
+
 static int
 __intel_display_resume(struct drm_device *dev,
 		       struct drm_atomic_state *state,
@@ -8426,7 +8459,7 @@  skylake_get_initial_plane_config(struct intel_crtc *crtc,
 {
 	struct drm_device *dev = crtc->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
-	u32 val, base, offset, stride_mult, tiling;
+	u32 val, base, offset, stride_mult, tiling, alpha;
 	int pipe = crtc->pipe;
 	int fourcc, pixel_format;
 	unsigned int aligned_height;
@@ -8448,9 +8481,16 @@  skylake_get_initial_plane_config(struct intel_crtc *crtc,
 		goto error;
 
 	pixel_format = val & PLANE_CTL_FORMAT_MASK;
+
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
+		alpha = I915_READ(PLANE_COLOR_CTL(pipe, 0));
+		alpha &= PLANE_COLOR_ALPHA_MASK;
+	} else {
+		alpha = val & PLANE_CTL_ALPHA_MASK;
+	}
+
 	fourcc = skl_format_to_fourcc(pixel_format,
-				      val & PLANE_CTL_ORDER_RGBX,
-				      val & PLANE_CTL_ALPHA_MASK);
+				      val & PLANE_CTL_ORDER_RGBX, alpha);
 	fb->format = drm_format_info(fourcc);
 
 	tiling = val & PLANE_CTL_TILED_MASK;
@@ -12831,6 +12871,11 @@  intel_check_primary_plane(struct intel_plane *plane,
 		state->ctl = i9xx_plane_ctl(crtc_state, state);
 	}
 
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+		state->color_ctl = glk_plane_color_ctl(crtc_state, state);
+	else
+		state->color_ctl = 0;
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 00b488688042..92bc1325701b 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -425,6 +425,9 @@  struct intel_plane_state {
 	/* plane control register */
 	u32 ctl;
 
+	/* plane color control register */
+	u32 color_ctl;
+
 	/*
 	 * scaler_id
 	 *    = -1 : not using a scaler
@@ -1504,6 +1507,8 @@  static inline u32 intel_plane_ggtt_offset(const struct intel_plane_state *state)
 	return i915_ggtt_offset(state->vma);
 }
 
+u32 glk_plane_color_ctl(const struct intel_crtc_state *crtc_state,
+			const struct intel_plane_state *plane_state);
 u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
 		  const struct intel_plane_state *plane_state);
 u32 skl_plane_stride(const struct drm_framebuffer *fb, int plane,
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 4fcf80ca91dd..18b9c98bc802 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -240,6 +240,7 @@  skl_update_plane(struct intel_plane *plane,
 	enum plane_id plane_id = plane->id;
 	enum pipe pipe = plane->pipe;
 	u32 plane_ctl = plane_state->ctl;
+	u32 plane_color_ctl = plane_state->color_ctl;
 	const struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
 	u32 surf_addr = plane_state->main.offset;
 	unsigned int rotation = plane_state->base.rotation;
@@ -263,13 +264,9 @@  skl_update_plane(struct intel_plane *plane,
 
 	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 
-	if (IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) {
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
 		I915_WRITE_FW(PLANE_COLOR_CTL(pipe, plane_id),
-			      PLANE_COLOR_PIPE_GAMMA_ENABLE |
-			      PLANE_COLOR_PIPE_CSC_ENABLE |
-			      PLANE_COLOR_PLANE_GAMMA_DISABLE);
-	}
-
+			      plane_color_ctl);
 	if (key->flags) {
 		I915_WRITE_FW(PLANE_KEYVAL(pipe, plane_id), key->min_value);
 		I915_WRITE_FW(PLANE_KEYMAX(pipe, plane_id), key->max_value);
@@ -978,6 +975,11 @@  intel_check_sprite_plane(struct intel_plane *plane,
 		state->ctl = g4x_sprite_ctl(crtc_state, state);
 	}
 
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+		state->color_ctl = glk_plane_color_ctl(crtc_state, state);
+	else
+		state->color_ctl = 0;
+
 	return 0;
 }