[Intel-gfx] [PATCH 02/11] [v2] drm/i915: Extract i9xx_get_color_config()

[Swati Sharma]

Signed-off-by: Swati Sharma <swati2.sha...@intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h    |  3 +++
 drivers/gpu/drm/i915/intel_color.c | 51 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 9c206e8..8f2ae8a 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7175,6 +7175,9 @@ enum {
 /* legacy palette */
 #define _LGC_PALETTE_A           0x4a000
 #define _LGC_PALETTE_B           0x4a800
+#define LGC_PALETTE_RED_MASK     REG_GENMASK(23, 16)
+#define LGC_PALETTE_GREEN_MASK   REG_GENMASK(15, 8)
+#define LGC_PALETTE_BLUE_MASK    REG_GENMASK(7, 0)
 #define LGC_PALETTE(pipe, i) _MMIO(_PIPE(pipe, _LGC_PALETTE_A, _LGC_PALETTE_B) 
+ (i) * 4)
 
 /* ilk/snb precision palette */
diff --git a/drivers/gpu/drm/i915/intel_color.c 
b/drivers/gpu/drm/i915/intel_color.c
index 321cf52..f394402 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -1228,6 +1228,56 @@ static int icl_color_check(struct intel_crtc_state 
*crtc_state)
        return 0;
 }
 
+/* convert hw value with given bit_precision to lut property val */
+static u32 intel_color_lut_pack(u32 val, u32 bit_precision)
+{
+       u32 max = 0xffff >> (16 - bit_precision);
+
+       val = clamp_val(val, 0, max);
+
+       if (bit_precision < 16)
+               val <<= 16 - bit_precision;
+
+       return val;
+}
+
+static void i9xx_get_config_internal(struct intel_crtc_state *crtc_state)
+{
+       struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+       struct drm_device *dev = crtc->base.dev;
+       struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+       enum pipe pipe = crtc->pipe;
+       struct drm_property_blob *blob = NULL;
+       struct drm_color_lut *blob_data;
+       u32 i, val;
+
+       blob = drm_property_create_blob(dev,
+                                       sizeof(struct drm_color_lut) * 256,
+                                       NULL);
+       if (IS_ERR(blob))
+               return;
+
+       blob_data = blob->data;
+
+       for (i = 0; i < 256; i++) {
+               if (HAS_GMCH(dev_priv))
+                       val = I915_READ(PALETTE(pipe, i));
+               else
+                       val = I915_READ(LGC_PALETTE(pipe, i));
+
+               blob_data[i].red = 
intel_color_lut_pack(REG_FIELD_GET(LGC_PALETTE_RED_MASK, val) >> 16, 8);
+               blob_data[i].green = 
intel_color_lut_pack(REG_FIELD_GET(LGC_PALETTE_GREEN_MASK, val) >> 8, 8);
+               blob_data[i].blue = 
intel_color_lut_pack(REG_FIELD_GET(LGC_PALETTE_BLUE_MASK, val), 8);
+       }
+
+       crtc_state->base.gamma_lut = blob;
+}
+
+static void i9xx_get_color_config(struct intel_crtc_state *crtc_state)
+{
+       i9xx_get_config_internal(crtc_state);
+}
+
 void intel_color_init(struct intel_crtc *crtc)
 {
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
@@ -1248,6 +1298,7 @@ void intel_color_init(struct intel_crtc *crtc)
                        dev_priv->display.color_check = i9xx_color_check;
                        dev_priv->display.color_commit = i9xx_color_commit;
                        dev_priv->display.load_luts = i9xx_load_luts;
+                       dev_priv->display.get_color_config = 
i9xx_get_color_config;
                }
        } else {
                if (INTEL_GEN(dev_priv) >= 11)
-- 
1.9.1

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