diff options
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun8i_tcon_top.c')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun8i_tcon_top.c | 52 |
1 files changed, 43 insertions, 9 deletions
diff --git a/drivers/gpu/drm/sun4i/sun8i_tcon_top.c b/drivers/gpu/drm/sun4i/sun8i_tcon_top.c index 3040a79f298f..fc36e0c10a37 100644 --- a/drivers/gpu/drm/sun4i/sun8i_tcon_top.c +++ b/drivers/gpu/drm/sun4i/sun8i_tcon_top.c @@ -9,11 +9,17 @@ #include <linux/component.h> #include <linux/device.h> #include <linux/module.h> +#include <linux/of_device.h> #include <linux/of_graph.h> #include <linux/platform_device.h> #include "sun8i_tcon_top.h" +struct sun8i_tcon_top_quirks { + bool has_tcon_tv1; + bool has_dsi; +}; + static bool sun8i_tcon_top_node_is_tcon_top(struct device_node *node) { return !!of_match_node(sun8i_tcon_top_of_table, node); @@ -121,10 +127,13 @@ static int sun8i_tcon_top_bind(struct device *dev, struct device *master, struct platform_device *pdev = to_platform_device(dev); struct clk_hw_onecell_data *clk_data; struct sun8i_tcon_top *tcon_top; + const struct sun8i_tcon_top_quirks *quirks; struct resource *res; void __iomem *regs; int ret, i; + quirks = of_device_get_match_data(&pdev->dev); + tcon_top = devm_kzalloc(dev, sizeof(*tcon_top), GFP_KERNEL); if (!tcon_top) return -ENOMEM; @@ -168,6 +177,13 @@ static int sun8i_tcon_top_bind(struct device *dev, struct device *master, } /* + * At least on H6, some registers have some bits set by default + * which may cause issues. Clear them here. + */ + writel(0, regs + TCON_TOP_PORT_SEL_REG); + writel(0, regs + TCON_TOP_GATE_SRC_REG); + + /* * TCON TOP has two muxes, which select parent clock for each TCON TV * channel clock. Parent could be either TCON TV or TVE clock. For now * we leave this fixed to TCON TV, since TVE driver for R40 is not yet @@ -180,15 +196,17 @@ static int sun8i_tcon_top_bind(struct device *dev, struct device *master, &tcon_top->reg_lock, TCON_TOP_TCON_TV0_GATE, 0); - clk_data->hws[CLK_TCON_TOP_TV1] = - sun8i_tcon_top_register_gate(dev, "tcon-tv1", regs, - &tcon_top->reg_lock, - TCON_TOP_TCON_TV1_GATE, 1); + if (quirks->has_tcon_tv1) + clk_data->hws[CLK_TCON_TOP_TV1] = + sun8i_tcon_top_register_gate(dev, "tcon-tv1", regs, + &tcon_top->reg_lock, + TCON_TOP_TCON_TV1_GATE, 1); - clk_data->hws[CLK_TCON_TOP_DSI] = - sun8i_tcon_top_register_gate(dev, "dsi", regs, - &tcon_top->reg_lock, - TCON_TOP_TCON_DSI_GATE, 2); + if (quirks->has_dsi) + clk_data->hws[CLK_TCON_TOP_DSI] = + sun8i_tcon_top_register_gate(dev, "dsi", regs, + &tcon_top->reg_lock, + TCON_TOP_TCON_DSI_GATE, 2); for (i = 0; i < CLK_NUM; i++) if (IS_ERR(clk_data->hws[i])) { @@ -250,9 +268,25 @@ static int sun8i_tcon_top_remove(struct platform_device *pdev) return 0; } +const struct sun8i_tcon_top_quirks sun8i_r40_tcon_top_quirks = { + .has_tcon_tv1 = true, + .has_dsi = true, +}; + +const struct sun8i_tcon_top_quirks sun50i_h6_tcon_top_quirks = { + /* Nothing special */ +}; + /* sun4i_drv uses this list to check if a device node is a TCON TOP */ const struct of_device_id sun8i_tcon_top_of_table[] = { - { .compatible = "allwinner,sun8i-r40-tcon-top" }, + { + .compatible = "allwinner,sun8i-r40-tcon-top", + .data = &sun8i_r40_tcon_top_quirks + }, + { + .compatible = "allwinner,sun50i-h6-tcon-top", + .data = &sun50i_h6_tcon_top_quirks + }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, sun8i_tcon_top_of_table); |