linux-kernel - [PATCH 2/3] drm/sun4i: Set TCON clock inside sun4i_tconX_mode

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Message-Id: <20170425152505.6796-3-wens@csie.org>
Date:   Tue, 25 Apr 2017 23:25:04 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>,
        David Airlie <airlied@...ux.ie>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     Chen-Yu Tsai <wens@...e.org>, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: [PATCH 2/3] drm/sun4i: Set TCON clock inside sun4i_tconX_mode_set

Currently we are configuring the TCON's dot clock or special clock
directly from the encoder mode_set functions. Since we already
provide mode_set helper functions for the TCON's 2 channels, we
can set the respective clock from those helpers, and reduce the
exposure of the TCON's internals.

Signed-off-by: Chen-Yu Tsai <wens@...e.org>
---
 drivers/gpu/drm/sun4i/sun4i_rgb.c  | 2 --
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 6 ++++++
 drivers/gpu/drm/sun4i/sun4i_tv.c   | 2 --
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_rgb.c b/drivers/gpu/drm/sun4i/sun4i_rgb.c
index 1147451eb993..51ece4c39d7e 100644
--- a/drivers/gpu/drm/sun4i/sun4i_rgb.c
+++ b/drivers/gpu/drm/sun4i/sun4i_rgb.c
@@ -175,8 +175,6 @@ static void sun4i_rgb_encoder_mode_set(struct drm_encoder *encoder,
 
 	sun4i_tcon0_mode_set(tcon, mode);
 
-	clk_set_rate(tcon->dclk, mode->crtc_clock * 1000);
-
 	/* FIXME: This seems to be board specific */
 	clk_set_phase(tcon->dclk, 120);
 }
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index 8301389c411d..29fd829aa54c 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -131,6 +131,9 @@ void sun4i_tcon0_mode_set(struct sun4i_tcon *tcon,
 	u8 clk_delay;
 	u32 val = 0;
 
+	/* Configure the dot clock */
+	clk_set_rate(tcon->dclk, mode->crtc_clock * 1000);
+
 	/* Adjust clock delay */
 	clk_delay = sun4i_tcon_get_clk_delay(mode, 0);
 	regmap_update_bits(tcon->regs, SUN4I_TCON0_CTL_REG,
@@ -206,6 +209,9 @@ void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon,
 
 	WARN_ON(!tcon->quirks->has_channel_1);
 
+	/* Configure the dot clock */
+	clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000);
+
 	/* Adjust clock delay */
 	clk_delay = sun4i_tcon_get_clk_delay(mode, 1);
 	regmap_update_bits(tcon->regs, SUN4I_TCON1_CTL_REG,
diff --git a/drivers/gpu/drm/sun4i/sun4i_tv.c b/drivers/gpu/drm/sun4i/sun4i_tv.c
index 49c49431a053..542da220818b 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tv.c
@@ -486,8 +486,6 @@ static void sun4i_tv_mode_set(struct drm_encoder *encoder,
 		      SUN4I_TVE_RESYNC_FIELD : 0));
 
 	regmap_write(tv->regs, SUN4I_TVE_SLAVE_REG, 0);
-
-	clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000);
 }
 
 static struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = {
-- 
2.11.0