linux-kernel - [PATCH v3 044/105] drm/vc4: crtc: Move the HVS gamma LUT setup to our init function

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Date:   Wed, 27 May 2020 17:48:14 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Eric Anholt <eric@...olt.net>
Cc:     dri-devel@...ts.freedesktop.org,
        linux-rpi-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Tim Gover <tim.gover@...pberrypi.com>,
        Phil Elwell <phil@...pberrypi.com>,
        Maxime Ripard <maxime@...no.tech>
Subject: [PATCH v3 044/105] 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.

Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
 drivers/gpu/drm/vc4/vc4_hvs.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c
index 2352a63fd26b..87bbd68d44db 100644
--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/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;
 }
 
@@ -427,8 +443,6 @@ void vc4_hvs_mode_set_nofb(struct drm_crtc *crtc)
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
 	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_crtc->data->hvs_output == 2) {
 		u32 dispctrl;
@@ -453,16 +467,6 @@ void vc4_hvs_mode_set_nofb(struct drm_crtc *crtc)
 			   ~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)
-- 
git-series 0.9.1