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

Maxime Ripard
2017-07-13T14:13:05Z

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@free-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
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