drm/i915: Parametrize PALETTE and LGC_PALETTE

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_reg.h

@@ -2485,8 +2485,8 @@ enum skl_disp_power_wells {
 #define PALETTE_A_OFFSET 0xa000
 #define PALETTE_B_OFFSET 0xa800
 #define CHV_PALETTE_C_OFFSET 0xc000
-#define PALETTE(pipe) (dev_priv->info.palette_offsets[pipe] + \
-		       dev_priv->info.display_mmio_offset)
+#define PALETTE(pipe, i) (dev_priv->info.palette_offsets[pipe] + \
+			  dev_priv->info.display_mmio_offset + (i) * 4)
 
 /* MCH MMIO space */
 
@@ -5641,7 +5641,7 @@ enum skl_disp_power_wells {
 /* legacy palette */
 #define _LGC_PALETTE_A           0x4a000
 #define _LGC_PALETTE_B           0x4a800
-#define LGC_PALETTE(pipe) _PIPE(pipe, _LGC_PALETTE_A, _LGC_PALETTE_B)
+#define LGC_PALETTE(pipe, i) (_PIPE(pipe, _LGC_PALETTE_A, _LGC_PALETTE_B) + (i) * 4)
 
 #define _GAMMA_MODE_A		0x4a480
 #define _GAMMA_MODE_B		0x4ac80

drivers/gpu/drm/i915/intel_display.c

@@ -4593,7 +4593,6 @@ static void intel_crtc_load_lut(struct drm_crtc *crtc)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	enum pipe pipe = intel_crtc->pipe;
-	int palreg = PALETTE(pipe);
 	int i;
 	bool reenable_ips = false;
 
@@ -4608,10 +4607,6 @@ static void intel_crtc_load_lut(struct drm_crtc *crtc)
 			assert_pll_enabled(dev_priv, pipe);
 	}
 
-	/* use legacy palette for Ironlake */
-	if (!HAS_GMCH_DISPLAY(dev))
-		palreg = LGC_PALETTE(pipe);
-
 	/* Workaround : Do not read or write the pipe palette/gamma data while
 	 * GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled.
 	 */
@@ -4623,7 +4618,14 @@ static void intel_crtc_load_lut(struct drm_crtc *crtc)
 	}
 
 	for (i = 0; i < 256; i++) {
-		I915_WRITE(palreg + 4 * i,
+		u32 palreg;
+
+		if (HAS_GMCH_DISPLAY(dev))
+			palreg = PALETTE(pipe, i);
+		else
+			palreg = LGC_PALETTE(pipe, i);
+
+		I915_WRITE(palreg,
 			   (intel_crtc->lut_r[i] << 16) |
 			   (intel_crtc->lut_g[i] << 8) |
 			   intel_crtc->lut_b[i]);