drm/vc4: crtc: Move the HVS gamma LUT setup to our init function

Since most of the HVS channel is setup in the init function, let's move the
gamma setup there too. As this makes the HVS mode_set function empty, let's
remove it in the process.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://patchwork.freedesktop.org/patch/msgid/d439da8f1592a450a6ad35ab1f9e77def17c7965.1599120059.git-series.maxime@cerno.tech

drivers/gpu/drm/vc4/vc4_crtc.c

@@ -379,8 +379,6 @@ static void vc4_crtc_config_pv(struct drm_crtc *crtc)
 static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
 {
 	vc4_crtc_config_pv(crtc);
-
-	vc4_hvs_mode_set_nofb(crtc);
 }
 
 static void require_hvs_enabled(struct drm_device *dev)

drivers/gpu/drm/vc4/vc4_drv.h

@@ -904,7 +904,6 @@ int vc4_hvs_atomic_check(struct drm_crtc *crtc, struct drm_crtc_state *state);
 void vc4_hvs_atomic_enable(struct drm_crtc *crtc, struct drm_crtc_state *old_state);
 void vc4_hvs_atomic_disable(struct drm_crtc *crtc, struct drm_crtc_state *old_state);
 void vc4_hvs_atomic_flush(struct drm_crtc *crtc, struct drm_crtc_state *state);
-void vc4_hvs_mode_set_nofb(struct drm_crtc *crtc);
 void vc4_hvs_dump_state(struct drm_device *dev);
 void vc4_hvs_unmask_underrun(struct drm_device *dev, int channel);
 void vc4_hvs_mask_underrun(struct drm_device *dev, int channel);

drivers/gpu/drm/vc4/vc4_hvs.c

@@ -201,6 +201,8 @@ static int vc4_hvs_init_channel(struct vc4_dev *vc4, struct drm_crtc *crtc,
 {
 	struct vc4_crtc_state *vc4_crtc_state = to_vc4_crtc_state(crtc->state);
 	unsigned int chan = vc4_crtc_state->assigned_channel;
+	bool interlace = mode->flags & DRM_MODE_FLAG_INTERLACE;
+	u32 dispbkgndx;
 	u32 dispctrl;
 
 	/* Turn on the scaler, which will wait for vstart to start
@@ -225,6 +227,20 @@ static int vc4_hvs_init_channel(struct vc4_dev *vc4, struct drm_crtc *crtc,
 
 	HVS_WRITE(SCALER_DISPCTRLX(chan), dispctrl);
 
+	dispbkgndx = HVS_READ(SCALER_DISPBKGNDX(chan));
+	dispbkgndx &= ~SCALER_DISPBKGND_GAMMA;
+	dispbkgndx &= ~SCALER_DISPBKGND_INTERLACE;
+
+	HVS_WRITE(SCALER_DISPBKGNDX(chan), dispbkgndx |
+		  SCALER_DISPBKGND_AUTOHS |
+		  ((!vc4->hvs->hvs5) ? SCALER_DISPBKGND_GAMMA : 0) |
+		  (interlace ? SCALER_DISPBKGND_INTERLACE : 0));
+
+	/* Reload the LUT, since the SRAMs would have been disabled if
+	 * all CRTCs had SCALER_DISPBKGND_GAMMA unset at once.
+	 */
+	vc4_hvs_lut_load(crtc);
+
 	return 0;
 }
 
@@ -421,49 +437,6 @@ void vc4_hvs_atomic_flush(struct drm_crtc *crtc,
 	}
 }
 
-void vc4_hvs_mode_set_nofb(struct drm_crtc *crtc)
-{
-	struct drm_device *dev = crtc->dev;
-	struct vc4_dev *vc4 = to_vc4_dev(dev);
-	struct vc4_crtc_state *vc4_state = to_vc4_crtc_state(crtc->state);
-	struct drm_display_mode *mode = &crtc->state->adjusted_mode;
-	bool interlace = mode->flags & DRM_MODE_FLAG_INTERLACE;
-
-	if (vc4_state->assigned_channel == 2) {
-		u32 dispctrl;
-		u32 dsp3_mux;
-
-		/*
-		 * SCALER_DISPCTRL_DSP3 = X, where X < 2 means 'connect DSP3 to
-		 * FIFO X'.
-		 * SCALER_DISPCTRL_DSP3 = 3 means 'disable DSP 3'.
-		 *
-		 * DSP3 is connected to FIFO2 unless the transposer is
-		 * enabled. In this case, FIFO 2 is directly accessed by the
-		 * TXP IP, and we need to disable the FIFO2 -> pixelvalve1
-		 * route.
-		 */
-		if (vc4_state->feed_txp)
-			dsp3_mux = VC4_SET_FIELD(3, SCALER_DISPCTRL_DSP3_MUX);
-		else
-			dsp3_mux = VC4_SET_FIELD(2, SCALER_DISPCTRL_DSP3_MUX);
-
-		dispctrl = HVS_READ(SCALER_DISPCTRL) &
-			   ~SCALER_DISPCTRL_DSP3_MUX_MASK;
-		HVS_WRITE(SCALER_DISPCTRL, dispctrl | dsp3_mux);
-	}
-
-	HVS_WRITE(SCALER_DISPBKGNDX(vc4_state->assigned_channel),
-		  SCALER_DISPBKGND_AUTOHS |
-		  ((!vc4->hvs->hvs5) ? SCALER_DISPBKGND_GAMMA : 0) |
-		  (interlace ? SCALER_DISPBKGND_INTERLACE : 0));
-
-	/* Reload the LUT, since the SRAMs would have been disabled if
-	 * all CRTCs had SCALER_DISPBKGND_GAMMA unset at once.
-	 */
-	vc4_hvs_lut_load(crtc);
-}
-
 void vc4_hvs_mask_underrun(struct drm_device *dev, int channel)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);

drivers/gpu/drm/vc4/vc4_txp.c

@@ -436,7 +436,6 @@ static const struct drm_crtc_helper_funcs vc4_txp_crtc_helper_funcs = {
 	.atomic_flush	= vc4_hvs_atomic_flush,
 	.atomic_enable	= vc4_txp_atomic_enable,
 	.atomic_disable	= vc4_txp_atomic_disable,
-	.mode_set_nofb	= vc4_hvs_mode_set_nofb,
 };
 
 static irqreturn_t vc4_txp_interrupt(int irq, void *data)