drm: sun4i: add quirks for TCON TOP

Some SoCs, such as H6, doesn't have a full-featured TCON TOP.

Add quirks support for TCON TOP.

Currently the presence of TCON_TV1 and DSI is controlled via the quirks
structure.

Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
[Fixed code style and removed unnecessary initialization]
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/20181104182705.18047-25-jernej.skrabec@siol.net

1 files changed, 28 insertions, 9 deletions

diff --git a/drivers/gpu/drm/sun4i/sun8i_tcon_top.c b/drivers/gpu/drm/sun4i/sun8i_tcon_top.c
index 37158548b447..e94e3fb1736b 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;
@@ -187,15 +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])) {
@@ -257,9 +268,17 @@ 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,
+};
+
 /* 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
+        },
         { /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, sun8i_tcon_top_of_table);