Re: [PATCH 3/3] drm/i915: Implement half float formats and pixel normalize property

[Daniel Vetter <daniel@ffwll.ch>]

On Wed, Nov 28, 2018 at 10:38:13PM -0800, Kevin Strasser wrote:
> 64 bpp half float formats are supported on hdr planes only and are subject
> to the following restrictions:
>   * 90/270 rotation not supported
>   * Yf Tiling not supported
>   * Frame Buffer Compression not supported
>   * Color Keying not supported
> 
> The behavior of pixel normalize with non-float formats is currently
> undefined. As such, the pixel normalize register is enabled iff the
> framebuffer contains floating point pixel data.
> 
> Signed-off-by: Kevin Strasser <kevin.strasser@intel.com>
> Cc: Uma Shankar <uma.shankar@intel.com>
> Cc: Shashank Sharma <shashank.sharma@intel.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: dri-devel@lists.freedesktop.org

Do we have end-to-end userspace for this?
-Daniel

> ---
>  drivers/gpu/drm/i915/i915_reg.h      | 15 ++++++-
>  drivers/gpu/drm/i915/intel_display.c | 48 +++++++++++++++++++++
>  drivers/gpu/drm/i915/intel_drv.h     |  5 +++
>  drivers/gpu/drm/i915/intel_sprite.c  | 82 +++++++++++++++++++++++++++++++++---
>  4 files changed, 143 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 47baf2fe..871d293 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -6563,6 +6563,10 @@ enum {
>  #define _PLANE_KEYMAX_1_A			0x701a0
>  #define _PLANE_KEYMAX_2_A			0x702a0
>  #define  PLANE_KEYMAX_ALPHA(a)			((a) << 24)
> +#define _PLANE_PIXEL_NORMALIZE_1_A		0x701a8
> +#define _PLANE_PIXEL_NORMALIZE_2_A		0x702a8
> +#define   PLANE_PIXEL_NORMALIZE_ENABLE		(1 << 31)
> +#define   PLANE_PIXEL_NORMALIZE_FACTOR_MASK	0xffff
>  #define _PLANE_AUX_DIST_1_A			0x701c0
>  #define _PLANE_AUX_DIST_2_A			0x702c0
>  #define _PLANE_AUX_OFFSET_1_A			0x701c4
> @@ -6786,7 +6790,16 @@ enum {
>  #define PLANE_COLOR_CTL(pipe, plane)	\
>  	_MMIO_PLANE(plane, _PLANE_COLOR_CTL_1(pipe), _PLANE_COLOR_CTL_2(pipe))
>  
> -#/* SKL new cursor registers */
> +#define _PLANE_PIXEL_NORMALIZE_1_B	0x711a8
> +#define _PLANE_PIXEL_NORMALIZE_2_B	0x712a8
> +#define _PLANE_PIXEL_NORMALIZE_1(pipe) \
> +	_PIPE(pipe, _PLANE_PIXEL_NORMALIZE_1_A, _PLANE_PIXEL_NORMALIZE_1_B)
> +#define _PLANE_PIXEL_NORMALIZE_2(pipe) \
> +	_PIPE(pipe, _PLANE_PIXEL_NORMALIZE_2_A, _PLANE_PIXEL_NORMALIZE_2_B)
> +#define PLANE_PIXEL_NORMALIZE(pipe, plane) \
> +	_MMIO_PLANE(plane, _PLANE_PIXEL_NORMALIZE_1(pipe), _PLANE_PIXEL_NORMALIZE_2(pipe))
> +
> +/* SKL new cursor registers */
>  #define _CUR_BUF_CFG_A				0x7017c
>  #define _CUR_BUF_CFG_B				0x7117c
>  #define CUR_BUF_CFG(pipe)	_MMIO_PIPE(pipe, _CUR_BUF_CFG_A, _CUR_BUF_CFG_B)
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index e9f4e22..cbacb4b 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -2618,6 +2618,18 @@ int skl_format_to_fourcc(int format, bool rgb_order, bool alpha)
>  		return DRM_FORMAT_RGB565;
>  	case PLANE_CTL_FORMAT_NV12:
>  		return DRM_FORMAT_NV12;
> +	case PLANE_CTL_FORMAT_XRGB_16161616F:
> +		if (rgb_order) {
> +			if (alpha)
> +				return DRM_FORMAT_ABGR16161616H;
> +			else
> +				return DRM_FORMAT_XBGR16161616H;
> +		} else {
> +			if (alpha)
> +				return DRM_FORMAT_ARGB16161616H;
> +			else
> +				return DRM_FORMAT_XRGB16161616H;
> +		}
>  	default:
>  	case PLANE_CTL_FORMAT_XRGB_8888:
>  		if (rgb_order) {
> @@ -3505,6 +3517,12 @@ static u32 skl_plane_ctl_format(uint32_t pixel_format)
>  		return PLANE_CTL_FORMAT_YUV422 | PLANE_CTL_YUV422_VYUY;
>  	case DRM_FORMAT_NV12:
>  		return PLANE_CTL_FORMAT_NV12;
> +	case DRM_FORMAT_XBGR16161616H:
> +	case DRM_FORMAT_ABGR16161616H:
> +		return PLANE_CTL_FORMAT_XRGB_16161616F | PLANE_CTL_ORDER_RGBX;
> +	case DRM_FORMAT_XRGB16161616H:
> +	case DRM_FORMAT_ARGB16161616H:
> +		return PLANE_CTL_FORMAT_XRGB_16161616F;
>  	default:
>  		MISSING_CASE(pixel_format);
>  	}
> @@ -3680,6 +3698,32 @@ u32 glk_plane_color_ctl(const struct intel_crtc_state *crtc_state,
>  	return plane_color_ctl;
>  }
>  
> +u32 icl_plane_pixel_normalize(uint32_t pixel_format,
> +			      enum drm_pixel_normalize_range range)
> +{
> +	/* 1.0 in half float */
> +	u16 half_float_1 = 0x3c00;
> +	/* 3.92E-3 in half float */
> +	u16 half_float_255 = 0x1c04;
> +
> +	switch (pixel_format) {
> +	case DRM_FORMAT_XRGB16161616H:
> +	case DRM_FORMAT_XBGR16161616H:
> +	case DRM_FORMAT_ARGB16161616H:
> +	case DRM_FORMAT_ABGR16161616H:
> +		switch (range) {
> +		case DRM_PIXEL_NORMALIZE_RANGE_0_1:
> +			return PLANE_PIXEL_NORMALIZE_ENABLE | half_float_1;
> +		case DRM_PIXEL_NORMALIZE_RANGE_0_255:
> +			return PLANE_PIXEL_NORMALIZE_ENABLE | half_float_255;
> +		default:
> +			return 0;
> +		}
> +	default:
> +		return 0;
> +	}
> +}
> +
>  static int
>  __intel_display_resume(struct drm_device *dev,
>  		       struct drm_atomic_state *state,
> @@ -4998,6 +5042,10 @@ static int skl_update_scaler_plane(struct intel_crtc_state *crtc_state,
>  	case DRM_FORMAT_UYVY:
>  	case DRM_FORMAT_VYUY:
>  	case DRM_FORMAT_NV12:
> +	case DRM_FORMAT_XBGR16161616H:
> +	case DRM_FORMAT_ABGR16161616H:
> +	case DRM_FORMAT_XRGB16161616H:
> +	case DRM_FORMAT_ARGB16161616H:
>  		break;
>  	default:
>  		DRM_DEBUG_KMS("[PLANE:%d:%s] FB:%d unsupported scaling format 0x%x\n",
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index a62d77b..a56b131 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -565,6 +565,9 @@ struct intel_plane_state {
>  	u32 slave;
>  
>  	struct drm_intel_sprite_colorkey ckey;
> +
> +	/* plane pixel normalize register */
> +	u32 pixel_normalize;
>  };
>  
>  struct intel_initial_plane_config {
> @@ -1738,6 +1741,8 @@ u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
>  u32 glk_color_ctl(const struct intel_plane_state *plane_state);
>  u32 skl_plane_stride(const struct intel_plane_state *plane_state,
>  		     int plane);
> +u32 icl_plane_pixel_normalize(uint32_t pixel_format,
> +			      enum drm_pixel_normalize_range range);
>  int skl_check_plane_surface(struct intel_plane_state *plane_state);
>  int i9xx_check_plane_surface(struct intel_plane_state *plane_state);
>  int skl_format_to_fourcc(int format, bool rgb_order, bool alpha);
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index abe1938..9dea0b8 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -515,6 +515,10 @@ skl_program_plane(struct intel_plane *plane,
>  	if (fb->format->is_yuv && icl_is_hdr_plane(plane))
>  		icl_program_input_csc_coeff(crtc_state, plane_state);
>  
> +	if (fb->format->is_fp && icl_is_hdr_plane(plane))
> +		I915_WRITE_FW(PLANE_PIXEL_NORMALIZE(pipe, plane_id),
> +			      plane_state->pixel_normalize);
> +
>  	I915_WRITE_FW(PLANE_KEYVAL(pipe, plane_id), key->min_value);
>  	I915_WRITE_FW(PLANE_KEYMAX(pipe, plane_id), keymax);
>  	I915_WRITE_FW(PLANE_KEYMSK(pipe, plane_id), keymsk);
> @@ -1417,8 +1421,6 @@ static int skl_plane_check_fb(const struct intel_crtc_state *crtc_state,
>  		/*
>  		 * 90/270 is not allowed with RGB64 16:16:16:16 and
>  		 * Indexed 8-bit. RGB 16-bit 5:6:5 is allowed gen11 onwards.
> -		 * TBD: Add RGB64 case once its added in supported format
> -		 * list.
>  		 */
>  		switch (fb->format->format) {
>  		case DRM_FORMAT_RGB565:
> @@ -1426,6 +1428,10 @@ static int skl_plane_check_fb(const struct intel_crtc_state *crtc_state,
>  				break;
>  			/* fall through */
>  		case DRM_FORMAT_C8:
> +		case DRM_FORMAT_XRGB16161616H:
> +		case DRM_FORMAT_XBGR16161616H:
> +		case DRM_FORMAT_ARGB16161616H:
> +		case DRM_FORMAT_ABGR16161616H:
>  			DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",
>  				      drm_get_format_name(fb->format->format,
>  							  &format_name));
> @@ -1552,6 +1558,11 @@ static int skl_plane_check(struct intel_crtc_state *crtc_state,
>  		plane_state->color_ctl = glk_plane_color_ctl(crtc_state,
>  							     plane_state);
>  
> +	if (icl_is_hdr_plane(plane))
> +		plane_state->pixel_normalize =
> +			icl_plane_pixel_normalize(plane_state->base.fb->format->format,
> +						  plane_state->base.pixel_normalize_range);
> +
>  	return 0;
>  }
>  
> @@ -1741,6 +1752,45 @@ static const uint32_t skl_planar_formats[] = {
>  	DRM_FORMAT_NV12,
>  };
>  
> +static const uint32_t icl_hdr_plane_formats[] = {
> +	DRM_FORMAT_C8,
> +	DRM_FORMAT_RGB565,
> +	DRM_FORMAT_XRGB8888,
> +	DRM_FORMAT_XBGR8888,
> +	DRM_FORMAT_ARGB8888,
> +	DRM_FORMAT_ABGR8888,
> +	DRM_FORMAT_XRGB2101010,
> +	DRM_FORMAT_XBGR2101010,
> +	DRM_FORMAT_XRGB16161616H,
> +	DRM_FORMAT_XBGR16161616H,
> +	DRM_FORMAT_ARGB16161616H,
> +	DRM_FORMAT_ABGR16161616H,
> +	DRM_FORMAT_YUYV,
> +	DRM_FORMAT_YVYU,
> +	DRM_FORMAT_UYVY,
> +	DRM_FORMAT_VYUY,
> +};
> +
> +static const uint32_t icl_hdr_planar_formats[] = {
> +	DRM_FORMAT_C8,
> +	DRM_FORMAT_RGB565,
> +	DRM_FORMAT_XRGB8888,
> +	DRM_FORMAT_XBGR8888,
> +	DRM_FORMAT_ARGB8888,
> +	DRM_FORMAT_ABGR8888,
> +	DRM_FORMAT_XRGB2101010,
> +	DRM_FORMAT_XBGR2101010,
> +	DRM_FORMAT_XRGB16161616H,
> +	DRM_FORMAT_XBGR16161616H,
> +	DRM_FORMAT_ARGB16161616H,
> +	DRM_FORMAT_ABGR16161616H,
> +	DRM_FORMAT_YUYV,
> +	DRM_FORMAT_YVYU,
> +	DRM_FORMAT_UYVY,
> +	DRM_FORMAT_VYUY,
> +	DRM_FORMAT_NV12,
> +};
> +
>  static const uint64_t skl_plane_format_modifiers_noccs[] = {
>  	I915_FORMAT_MOD_Yf_TILED,
>  	I915_FORMAT_MOD_Y_TILED,
> @@ -1884,6 +1934,10 @@ static bool skl_plane_format_mod_supported(struct drm_plane *_plane,
>  			return true;
>  		/* fall through */
>  	case DRM_FORMAT_C8:
> +	case DRM_FORMAT_XBGR16161616H:
> +	case DRM_FORMAT_ABGR16161616H:
> +	case DRM_FORMAT_XRGB16161616H:
> +	case DRM_FORMAT_ARGB16161616H:
>  		if (modifier == DRM_FORMAT_MOD_LINEAR ||
>  		    modifier == I915_FORMAT_MOD_X_TILED ||
>  		    modifier == I915_FORMAT_MOD_Y_TILED)
> @@ -2020,11 +2074,21 @@ skl_universal_plane_create(struct drm_i915_private *dev_priv,
>  		plane->update_slave = icl_update_slave;
>  
>  	if (skl_plane_has_planar(dev_priv, pipe, plane_id)) {
> -		formats = skl_planar_formats;
> -		num_formats = ARRAY_SIZE(skl_planar_formats);
> +		if (icl_is_hdr_plane(plane)) {
> +			formats = icl_hdr_planar_formats;
> +			num_formats = ARRAY_SIZE(icl_hdr_planar_formats);
> +		} else {
> +			formats = skl_planar_formats;
> +			num_formats = ARRAY_SIZE(skl_planar_formats);
> +		}
>  	} else {
> -		formats = skl_plane_formats;
> -		num_formats = ARRAY_SIZE(skl_plane_formats);
> +		if (icl_is_hdr_plane(plane)) {
> +			formats = icl_hdr_plane_formats;
> +			num_formats = ARRAY_SIZE(icl_hdr_plane_formats);
> +		} else {
> +			formats = skl_plane_formats;
> +			num_formats = ARRAY_SIZE(skl_plane_formats);
> +		}
>  	}
>  
>  	plane->has_ccs = skl_plane_has_ccs(dev_priv, pipe, plane_id);
> @@ -2074,6 +2138,12 @@ skl_universal_plane_create(struct drm_i915_private *dev_priv,
>  					     BIT(DRM_MODE_BLEND_PREMULTI) |
>  					     BIT(DRM_MODE_BLEND_COVERAGE));
>  
> +	if (icl_is_hdr_plane(plane))
> +		drm_plane_create_pixel_normalize_range_property(&plane->base,
> +				BIT(DRM_PIXEL_NORMALIZE_RANGE_0_1) |
> +				BIT(DRM_PIXEL_NORMALIZE_RANGE_0_255),
> +				DRM_PIXEL_NORMALIZE_RANGE_0_1);
> +
>  	drm_plane_helper_add(&plane->base, &intel_plane_helper_funcs);
>  
>  	return plane;
> -- 
> 2.7.4
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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