[Intel-gfx] [v8][PATCH 07/10] drm/i915/display: Extract chv_read_luts()

[Shankar, Uma]

>-----Original Message-----
>From: Sharma, Swati2
>Sent: Monday, August 26, 2019 11:56 AM
>To: intel-gfx at lists.freedesktop.org
>Cc: Nikula, Jani <jani.nikula at intel.com>; Sharma, Shashank
><shashank.sharma at intel.com>; Manna, Animesh <animesh.manna at intel.com>;
>Nautiyal, Ankit K <ankit.k.nautiyal at intel.com>; daniel.vetter at ffwll.ch;
>ville.syrjala at linux.intel.com; Shankar, Uma <uma.shankar at intel.com>; Sharma,
>Swati2 <swati2.sharma at intel.com>
>Subject: [v8][PATCH 07/10] drm/i915/display: Extract chv_read_luts()
>
>For cherryview, have hw read out to create hw blob of gamma lut values.

Same comments as previous patch.

>Signed-off-by: Swati Sharma <swati2.sharma at intel.com>
>---
> drivers/gpu/drm/i915/display/intel_color.c | 39 ++++++++++++++++++++++++++++++
> drivers/gpu/drm/i915/i915_reg.h            |  3 +++
> 2 files changed, 42 insertions(+)
>
>diff --git a/drivers/gpu/drm/i915/display/intel_color.c
>b/drivers/gpu/drm/i915/display/intel_color.c
>index c77bbed..1ec2fa0 100644
>--- a/drivers/gpu/drm/i915/display/intel_color.c
>+++ b/drivers/gpu/drm/i915/display/intel_color.c
>@@ -1609,6 +1609,44 @@ static void i965_read_luts(struct intel_crtc_state
>*crtc_state)
> 		crtc_state->base.gamma_lut =
>i965_read_gamma_lut_10p6(crtc_state);
> }
>
>+static struct drm_property_blob *
>+chv_read_cgm_gamma_lut(struct intel_crtc_state *crtc_state) {

Make it const. If planning to use same for degamma as well, drop gamma
from function name to have it generic.

>+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
>+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
>+	u32 i, val, lut_size = INTEL_INFO(dev_priv)->color.gamma_lut_size;
>+	enum pipe pipe = crtc->pipe;
>+	struct drm_property_blob *blob;
>+	struct drm_color_lut *blob_data;
>+
>+	blob = drm_property_create_blob(&dev_priv->drm,
>+					sizeof(struct drm_color_lut) * lut_size,
>+					NULL);
>+	if (IS_ERR(blob))
>+		return NULL;
>+
>+	blob_data = blob->data;
>+
>+	for (i = 0; i < lut_size; i++) {
>+		val = I915_READ(CGM_PIPE_GAMMA(pipe, i, 0));
>+		blob_data[i].green =
>intel_color_lut_pack(REG_FIELD_GET(CGM_PIPE_GAMMA_GREEN_MASK, val), 10);
>+		blob_data[i].blue =
>+intel_color_lut_pack(REG_FIELD_GET(CGM_PIPE_GAMMA_BLUE_MASK, val), 10);

Wrap these lines.

>+
>+		val = I915_READ(CGM_PIPE_GAMMA(pipe, i, 1));
>+		blob_data[i].red =
>intel_color_lut_pack(REG_FIELD_GET(CGM_PIPE_GAMMA_RED_MASK, val), 10);
>+	}
>+
>+	return blob;
>+}
>+
>+static void chv_read_luts(struct intel_crtc_state *crtc_state) {
>+	if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
>+		crtc_state->base.gamma_lut = i9xx_read_lut_8(crtc_state);
>+	else
>+		crtc_state->base.gamma_lut =
>chv_read_cgm_gamma_lut(crtc_state);
>+}
>+
> void intel_color_init(struct intel_crtc *crtc)  {
> 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); @@ -1621,6
>+1659,7 @@ void intel_color_init(struct intel_crtc *crtc)
> 			dev_priv->display.color_check = chv_color_check;
> 			dev_priv->display.color_commit = i9xx_color_commit;
> 			dev_priv->display.load_luts = chv_load_luts;
>+			dev_priv->display.read_luts = chv_read_luts;
> 		} else if (INTEL_GEN(dev_priv) >= 4) {
> 			dev_priv->display.color_check = i9xx_color_check;
> 			dev_priv->display.color_commit = i9xx_color_commit; diff --
>git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index
>b30b0c6b..e76e779 100644
>--- a/drivers/gpu/drm/i915/i915_reg.h
>+++ b/drivers/gpu/drm/i915/i915_reg.h
>@@ -10307,6 +10307,9 @@ enum skl_power_gate {
> #define   CGM_PIPE_MODE_GAMMA	(1 << 2)
> #define   CGM_PIPE_MODE_CSC	(1 << 1)
> #define   CGM_PIPE_MODE_DEGAMMA	(1 << 0)
>+#define   CGM_PIPE_GAMMA_RED_MASK   REG_GENMASK(9, 0)
>+#define   CGM_PIPE_GAMMA_GREEN_MASK REG_GENMASK(25, 16)
>+#define   CGM_PIPE_GAMMA_BLUE_MASK  REG_GENMASK(9, 0)
>
> #define _CGM_PIPE_B_CSC_COEFF01	(VLV_DISPLAY_BASE + 0x69900)
> #define _CGM_PIPE_B_CSC_COEFF23	(VLV_DISPLAY_BASE + 0x69904)
>--
>1.9.1