Commit 5375f433 authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

drm/i915: Read out CHV CGM degamma 



Since CHV has the dedicate CGM degamma unit readout is trivial.
Just do it.

v2: deal with post_csc_lut

Reviewed-by: default avatarUma Shankar <uma.shankar@intel.com>
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114153732.11773-10-ville.syrjala@linux.intel.com
parent aec31331

drivers/gpu/drm/i915/display/intel_color.c

+36 −0
Original line number Diff line number Diff line
@@ -1087,6 +1087,13 @@ static u32 chv_cgm_degamma_udw(const struct drm_color_lut *color) 
	return REG_FIELD_PREP(CGM_PIPE_DEGAMMA_RED_UDW_MASK, drm_color_lut_extract(color->red, 14));

}



static void chv_cgm_degamma_pack(struct drm_color_lut *entry, u32 ldw, u32 udw)

{

	entry->green = intel_color_lut_pack(REG_FIELD_GET(CGM_PIPE_DEGAMMA_GREEN_LDW_MASK, ldw), 14);

	entry->blue = intel_color_lut_pack(REG_FIELD_GET(CGM_PIPE_DEGAMMA_BLUE_LDW_MASK, ldw), 14);

	entry->red = intel_color_lut_pack(REG_FIELD_GET(CGM_PIPE_DEGAMMA_RED_UDW_MASK, udw), 14);

}



static void chv_load_cgm_degamma(struct intel_crtc *crtc,

				 const struct drm_property_blob *blob)

{
@@ -2048,6 +2055,32 @@ static void i965_read_luts(struct intel_crtc_state *crtc_state) 
		crtc_state->post_csc_lut = i965_read_lut_10p6(crtc);

}



static struct drm_property_blob *chv_read_cgm_degamma(struct intel_crtc *crtc)

{

	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);

	int i, lut_size = INTEL_INFO(dev_priv)->display.color.degamma_lut_size;

	enum pipe pipe = crtc->pipe;

	struct drm_property_blob *blob;

	struct drm_color_lut *lut;



	blob = drm_property_create_blob(&dev_priv->drm,

					sizeof(lut[0]) * lut_size,

					NULL);

	if (IS_ERR(blob))

		return NULL;



	lut = blob->data;



	for (i = 0; i < lut_size; i++) {

		u32 ldw = intel_de_read_fw(dev_priv, CGM_PIPE_DEGAMMA(pipe, i, 0));

		u32 udw = intel_de_read_fw(dev_priv, CGM_PIPE_DEGAMMA(pipe, i, 1));



		chv_cgm_degamma_pack(&lut[i], ldw, udw);

	}



	return blob;

}



static struct drm_property_blob *chv_read_cgm_gamma(struct intel_crtc *crtc)

{

	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
@@ -2078,6 +2111,9 @@ static void chv_read_luts(struct intel_crtc_state *crtc_state) 
{

	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);



	if (crtc_state->cgm_mode & CGM_PIPE_MODE_DEGAMMA)

		crtc_state->pre_csc_lut = chv_read_cgm_degamma(crtc);



	if (crtc_state->cgm_mode & CGM_PIPE_MODE_GAMMA)

		crtc_state->post_csc_lut = chv_read_cgm_gamma(crtc);

	else