linux-kernel - [PATCH 10/18] drm/sun4i: tcon: Move out the tcon0 common setup

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Message-Id: <45529eeddc5d5eab9bcfa74982343eeb36fe11f6.1499955058.git-series.maxime.ripard@free-electrons.com>
Date:   Thu, 13 Jul 2017 16:13:05 +0200
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Mark Brown <broonie@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     dri-devel@...ts.freedesktop.org,
        Daniel Vetter <daniel.vetter@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Subject: [PATCH 10/18] drm/sun4i: tcon: Move out the tcon0 common setup

Some channel0 setup has to be done, no matter what the output interface is
(RGB, CPU, LVDS). Move that code into a common function in order to avoid
duplication.

Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index a3bbf9994cfa..f051862d635e 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -125,15 +125,26 @@ static int sun4i_tcon_get_clk_delay(struct drm_display_mode *mode,
 	return delay;
 }
 
-static void sun4i_tcon0_mode_set(struct sun4i_tcon *tcon,
-				 struct drm_display_mode *mode)
+static void sun4i_tcon0_mode_set_common(struct sun4i_tcon *tcon,
+					struct drm_display_mode *mode)
+{
+	/* Configure the dot clock */
+	clk_set_rate_protect(tcon->dclk, mode->crtc_clock * 1000);
+
+	/* Set the resolution */
+	regmap_write(tcon->regs, SUN4I_TCON0_BASIC0_REG,
+		     SUN4I_TCON0_BASIC0_X(mode->crtc_hdisplay) |
+		     SUN4I_TCON0_BASIC0_Y(mode->crtc_vdisplay));
+}
+
+static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
+				     struct drm_display_mode *mode)
 {
 	unsigned int bp, hsync, vsync;
 	u8 clk_delay;
 	u32 val = 0;
 
-	/* Configure the dot clock */
-	clk_set_rate(tcon->dclk, mode->crtc_clock * 1000);
+	sun4i_tcon0_mode_set_common(tcon, mode);
 
 	/* Adjust clock delay */
 	clk_delay = sun4i_tcon_get_clk_delay(mode, 0);
@@ -141,11 +152,6 @@ static void sun4i_tcon0_mode_set(struct sun4i_tcon *tcon,
 			   SUN4I_TCON0_CTL_CLK_DELAY_MASK,
 			   SUN4I_TCON0_CTL_CLK_DELAY(clk_delay));
 
-	/* Set the resolution */
-	regmap_write(tcon->regs, SUN4I_TCON0_BASIC0_REG,
-		     SUN4I_TCON0_BASIC0_X(mode->crtc_hdisplay) |
-		     SUN4I_TCON0_BASIC0_Y(mode->crtc_vdisplay));
-
 	/*
 	 * This is called a backporch in the register documentation,
 	 * but it really is the back porch + hsync
@@ -295,7 +301,7 @@ void sun4i_tcon_mode_set(struct sun4i_tcon *tcon, struct drm_encoder *encoder,
 {
 	switch (encoder->encoder_type) {
 	case DRM_MODE_ENCODER_NONE:
-		sun4i_tcon0_mode_set(tcon, mode);
+		sun4i_tcon0_mode_set_rgb(tcon, mode);
 		break;
 	case DRM_MODE_ENCODER_TVDAC:
 		/*
-- 
git-series 0.9.1