diff options
author | Jernej Skrabec <jernej.skrabec@siol.net> | 2018-07-10 22:35:04 +0200 |
---|---|---|
committer | Maxime Ripard <maxime.ripard@bootlin.com> | 2018-07-11 09:54:54 +0200 |
commit | 05db311a792d65633ab77950e520eaa5f031cf80 (patch) | |
tree | 98896ab459f2e8326d73331ba144c85686ac86ae /drivers/gpu/drm/sun4i/sun8i_tcon_top.c | |
parent | e0f56782bc2d715d6386f77df40e31e64e2b80b7 (diff) |
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 <wens@csie.org>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180710203511.18454-12-jernej.skrabec@siol.net
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun8i_tcon_top.c')
-rw-r--r-- | drivers/gpu/drm/sun4i/sun8i_tcon_top.c | 74 |
1 files changed, 74 insertions, 0 deletions
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); |