41 static void canvas_write(struct meson_canvas *canvas, u32 reg, u32 val)  in canvas_write()  argument
43 	writel_relaxed(val, canvas->reg_base + reg);  in canvas_write()
46 static u32 canvas_read(struct meson_canvas *canvas, u32 reg)  in canvas_read()  argument
48 	return readl_relaxed(canvas->reg_base + reg);  in canvas_read()
55 	struct meson_canvas *canvas;  in meson_canvas_get()  local
74 	canvas = dev_get_drvdata(&canvas_pdev->dev);  in meson_canvas_get()
75 	if (!canvas)  in meson_canvas_get()
78 	return canvas;  in meson_canvas_get()
82 int meson_canvas_config(struct meson_canvas *canvas, u8 canvas_index,  in meson_canvas_config()  argument
90 	if (endian && !canvas->supports_endianness) {  in meson_canvas_config()
91 		dev_err(canvas->dev,  in meson_canvas_config()
96 	spin_lock_irqsave(&canvas->lock, flags);  in meson_canvas_config()
97 	if (!canvas->used[canvas_index]) {  in meson_canvas_config()
98 		dev_err(canvas->dev,  in meson_canvas_config()
101 		spin_unlock_irqrestore(&canvas->lock, flags);  in meson_canvas_config()
105 	canvas_write(canvas, DMC_CAV_LUT_DATAL,  in meson_canvas_config()
109 	canvas_write(canvas, DMC_CAV_LUT_DATAH,  in meson_canvas_config()
117 	canvas_write(canvas, DMC_CAV_LUT_ADDR,  in meson_canvas_config()
121 	canvas_read(canvas, DMC_CAV_LUT_DATAH);  in meson_canvas_config()
122 	spin_unlock_irqrestore(&canvas->lock, flags);  in meson_canvas_config()
128 int meson_canvas_alloc(struct meson_canvas *canvas, u8 *canvas_index)  in meson_canvas_alloc()  argument
133 	spin_lock_irqsave(&canvas->lock, flags);  in meson_canvas_alloc()
135 		if (!canvas->used[i]) {  in meson_canvas_alloc()
136 			canvas->used[i] = 1;  in meson_canvas_alloc()
137 			spin_unlock_irqrestore(&canvas->lock, flags);  in meson_canvas_alloc()
142 	spin_unlock_irqrestore(&canvas->lock, flags);  in meson_canvas_alloc()
144 	dev_err(canvas->dev, "No more canvas available\n");  in meson_canvas_alloc()
149 int meson_canvas_free(struct meson_canvas *canvas, u8 canvas_index)  in meson_canvas_free()  argument
153 	spin_lock_irqsave(&canvas->lock, flags);  in meson_canvas_free()
154 	if (!canvas->used[canvas_index]) {  in meson_canvas_free()
155 		dev_err(canvas->dev,  in meson_canvas_free()
157 		spin_unlock_irqrestore(&canvas->lock, flags);  in meson_canvas_free()
160 	canvas->used[canvas_index] = 0;  in meson_canvas_free()
161 	spin_unlock_irqrestore(&canvas->lock, flags);  in meson_canvas_free()
170 	struct meson_canvas *canvas;  in meson_canvas_probe()  local
173 	canvas = devm_kzalloc(dev, sizeof(*canvas), GFP_KERNEL);  in meson_canvas_probe()
174 	if (!canvas)  in meson_canvas_probe()
178 	canvas->reg_base = devm_ioremap_resource(dev, res);  in meson_canvas_probe()
179 	if (IS_ERR(canvas->reg_base))  in meson_canvas_probe()
180 		return PTR_ERR(canvas->reg_base);  in meson_canvas_probe()
182 	canvas->supports_endianness = of_device_get_match_data(dev);  in meson_canvas_probe()
184 	canvas->dev = dev;  in meson_canvas_probe()
185 	spin_lock_init(&canvas->lock);  in meson_canvas_probe()
186 	dev_set_drvdata(dev, canvas);  in meson_canvas_probe()