From 05db311a792d65633ab77950e520eaa5f031cf80 Mon Sep 17 00:00:00 2001 From: Jernej Skrabec Date: Tue, 10 Jul 2018 22:35:04 +0200 Subject: [PATCH] drm/sun4i: tcon-top: Add helpers for mux switching We want to be able to set TCON TOP muxes at runtime. Add helpers for that. Old, static configuration of muxes at probe time is preserved for now. It will be removed when R40 TCON starts using them. Reviewed-by: Chen-Yu Tsai Signed-off-by: Jernej Skrabec Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20180710203511.18454-12-jernej.skrabec@siol.net --- drivers/gpu/drm/sun4i/sun8i_tcon_top.c | 74 ++++++++++++++++++++++++++ drivers/gpu/drm/sun4i/sun8i_tcon_top.h | 4 ++ 2 files changed, 78 insertions(+) diff --git a/drivers/gpu/drm/sun4i/sun8i_tcon_top.c b/drivers/gpu/drm/sun4i/sun8i_tcon_top.c index ab2591a92ef0..14add8801cda 100644 --- a/drivers/gpu/drm/sun4i/sun8i_tcon_top.c +++ b/drivers/gpu/drm/sun4i/sun8i_tcon_top.c @@ -14,6 +14,79 @@ #include "sun8i_tcon_top.h" +static bool sun8i_tcon_top_node_is_tcon_top(struct device_node *node) +{ + return !!of_match_node(sun8i_tcon_top_of_table, node); +} + +int sun8i_tcon_top_set_hdmi_src(struct device *dev, int tcon) +{ + struct sun8i_tcon_top *tcon_top = dev_get_drvdata(dev); + unsigned long flags; + u32 val; + + if (!sun8i_tcon_top_node_is_tcon_top(dev->of_node)) { + dev_err(dev, "Device is not TCON TOP!\n"); + return -EINVAL; + } + + if (tcon < 2 || tcon > 3) { + dev_err(dev, "TCON index must be 2 or 3!\n"); + return -EINVAL; + } + + spin_lock_irqsave(&tcon_top->reg_lock, flags); + + val = readl(tcon_top->regs + TCON_TOP_GATE_SRC_REG); + val &= ~TCON_TOP_HDMI_SRC_MSK; + val |= FIELD_PREP(TCON_TOP_HDMI_SRC_MSK, tcon - 1); + writel(val, tcon_top->regs + TCON_TOP_GATE_SRC_REG); + + spin_unlock_irqrestore(&tcon_top->reg_lock, flags); + + return 0; +} +EXPORT_SYMBOL(sun8i_tcon_top_set_hdmi_src); + +int sun8i_tcon_top_de_config(struct device *dev, int mixer, int tcon) +{ + struct sun8i_tcon_top *tcon_top = dev_get_drvdata(dev); + unsigned long flags; + u32 reg; + + if (!sun8i_tcon_top_node_is_tcon_top(dev->of_node)) { + dev_err(dev, "Device is not TCON TOP!\n"); + return -EINVAL; + } + + if (mixer > 1) { + dev_err(dev, "Mixer index is too high!\n"); + return -EINVAL; + } + + if (tcon > 3) { + dev_err(dev, "TCON index is too high!\n"); + return -EINVAL; + } + + spin_lock_irqsave(&tcon_top->reg_lock, flags); + + reg = readl(tcon_top->regs + TCON_TOP_PORT_SEL_REG); + if (mixer == 0) { + reg &= ~TCON_TOP_PORT_DE0_MSK; + reg |= FIELD_PREP(TCON_TOP_PORT_DE0_MSK, tcon); + } else { + reg &= ~TCON_TOP_PORT_DE1_MSK; + reg |= FIELD_PREP(TCON_TOP_PORT_DE1_MSK, tcon); + } + writel(reg, tcon_top->regs + TCON_TOP_PORT_SEL_REG); + + spin_unlock_irqrestore(&tcon_top->reg_lock, flags); + + return 0; +} +EXPORT_SYMBOL(sun8i_tcon_top_de_config); + static int sun8i_tcon_top_get_connected_ep_id(struct device_node *node, int port_id) { @@ -109,6 +182,7 @@ static int sun8i_tcon_top_bind(struct device *dev, struct device *master, res = platform_get_resource(pdev, IORESOURCE_MEM, 0); regs = devm_ioremap_resource(dev, res); + tcon_top->regs = regs; if (IS_ERR(regs)) return PTR_ERR(regs); diff --git a/drivers/gpu/drm/sun4i/sun8i_tcon_top.h b/drivers/gpu/drm/sun4i/sun8i_tcon_top.h index 39838bbfeaee..0390584a330e 100644 --- a/drivers/gpu/drm/sun4i/sun8i_tcon_top.h +++ b/drivers/gpu/drm/sun4i/sun8i_tcon_top.h @@ -26,6 +26,7 @@ struct sun8i_tcon_top { struct clk *bus; struct clk_hw_onecell_data *clk_data; + void __iomem *regs; struct reset_control *rst; /* @@ -37,4 +38,7 @@ struct sun8i_tcon_top { extern const struct of_device_id sun8i_tcon_top_of_table[]; +int sun8i_tcon_top_set_hdmi_src(struct device *dev, int tcon); +int sun8i_tcon_top_de_config(struct device *dev, int mixer, int tcon); + #endif /* _SUN8I_TCON_TOP_H_ */ -- 2.30.2