TV TCONs connected to TCON TOP have to enable additional gate in order to work.
Add support for such TCONs.
Signed-off-by: Jernej Skrabec jernej.skrabec@siol.net --- drivers/gpu/drm/sun4i/sun4i_tcon.c | 11 +++++++++++ drivers/gpu/drm/sun4i/sun4i_tcon.h | 4 ++++ 2 files changed, 15 insertions(+)
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c index 08747fc3ee71..0afb5a94a414 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c @@ -688,6 +688,16 @@ static int sun4i_tcon_init_clocks(struct device *dev, dev_err(dev, "Couldn't get the TCON bus clock\n"); return PTR_ERR(tcon->clk); } + + if (tcon->quirks->has_tcon_top_gate) { + tcon->top_clk = devm_clk_get(dev, "tcon-top"); + if (IS_ERR(tcon->top_clk)) { + dev_err(dev, "Couldn't get the TCON TOP bus clock\n"); + return PTR_ERR(tcon->top_clk); + } + clk_prepare_enable(tcon->top_clk); + } + clk_prepare_enable(tcon->clk);
if (tcon->quirks->has_channel_0) { @@ -712,6 +722,7 @@ static int sun4i_tcon_init_clocks(struct device *dev, static void sun4i_tcon_free_clocks(struct sun4i_tcon *tcon) { clk_disable_unprepare(tcon->clk); + clk_disable_unprepare(tcon->top_clk); }
static int sun4i_tcon_init_irq(struct device *dev, diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.h b/drivers/gpu/drm/sun4i/sun4i_tcon.h index f6a071cd5a6f..652d5c37d7b4 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.h +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.h @@ -224,6 +224,7 @@ struct sun4i_tcon_quirks { bool needs_de_be_mux; /* sun6i needs mux to select backend */ bool needs_edp_reset; /* a80 edp reset needed for tcon0 access */ bool supports_lvds; /* Does the TCON support an LVDS output? */ + bool has_tcon_top_gate; /* TCON TOP holds additional gate to enable */
/* callback to handle tcon muxing options */ int (*set_mux)(struct sun4i_tcon *, const struct drm_encoder *); @@ -249,6 +250,9 @@ struct sun4i_tcon { u8 dclk_max_div; u8 dclk_min_div;
+ /* TCON TOP clock */ + struct clk *top_clk; + /* Reset control */ struct reset_control *lcd_rst; struct reset_control *lvds_rst;