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path: root/drivers/gpu/drm/sun4i/sun8i_tcon_top.c
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Diffstat (limited to 'drivers/gpu/drm/sun4i/sun8i_tcon_top.c')
-rw-r--r--drivers/gpu/drm/sun4i/sun8i_tcon_top.c52
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);