2 * Copyright (C) 2012 Avionic Design GmbH
3 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
10 #include <linux/clk.h>
16 struct tegra_output output;
17 struct clk *clk_parent;
21 static inline struct tegra_rgb *to_rgb(struct tegra_output *output)
23 return container_of(output, struct tegra_rgb, output);
31 static const struct reg_entry rgb_enable[] = {
32 { DC_COM_PIN_OUTPUT_ENABLE(0), 0x00000000 },
33 { DC_COM_PIN_OUTPUT_ENABLE(1), 0x00000000 },
34 { DC_COM_PIN_OUTPUT_ENABLE(2), 0x00000000 },
35 { DC_COM_PIN_OUTPUT_ENABLE(3), 0x00000000 },
36 { DC_COM_PIN_OUTPUT_POLARITY(0), 0x00000000 },
37 { DC_COM_PIN_OUTPUT_POLARITY(1), 0x01000000 },
38 { DC_COM_PIN_OUTPUT_POLARITY(2), 0x00000000 },
39 { DC_COM_PIN_OUTPUT_POLARITY(3), 0x00000000 },
40 { DC_COM_PIN_OUTPUT_DATA(0), 0x00000000 },
41 { DC_COM_PIN_OUTPUT_DATA(1), 0x00000000 },
42 { DC_COM_PIN_OUTPUT_DATA(2), 0x00000000 },
43 { DC_COM_PIN_OUTPUT_DATA(3), 0x00000000 },
44 { DC_COM_PIN_OUTPUT_SELECT(0), 0x00000000 },
45 { DC_COM_PIN_OUTPUT_SELECT(1), 0x00000000 },
46 { DC_COM_PIN_OUTPUT_SELECT(2), 0x00000000 },
47 { DC_COM_PIN_OUTPUT_SELECT(3), 0x00000000 },
48 { DC_COM_PIN_OUTPUT_SELECT(4), 0x00210222 },
49 { DC_COM_PIN_OUTPUT_SELECT(5), 0x00002200 },
50 { DC_COM_PIN_OUTPUT_SELECT(6), 0x00020000 },
53 static const struct reg_entry rgb_disable[] = {
54 { DC_COM_PIN_OUTPUT_SELECT(6), 0x00000000 },
55 { DC_COM_PIN_OUTPUT_SELECT(5), 0x00000000 },
56 { DC_COM_PIN_OUTPUT_SELECT(4), 0x00000000 },
57 { DC_COM_PIN_OUTPUT_SELECT(3), 0x00000000 },
58 { DC_COM_PIN_OUTPUT_SELECT(2), 0x00000000 },
59 { DC_COM_PIN_OUTPUT_SELECT(1), 0x00000000 },
60 { DC_COM_PIN_OUTPUT_SELECT(0), 0x00000000 },
61 { DC_COM_PIN_OUTPUT_DATA(3), 0xaaaaaaaa },
62 { DC_COM_PIN_OUTPUT_DATA(2), 0xaaaaaaaa },
63 { DC_COM_PIN_OUTPUT_DATA(1), 0xaaaaaaaa },
64 { DC_COM_PIN_OUTPUT_DATA(0), 0xaaaaaaaa },
65 { DC_COM_PIN_OUTPUT_POLARITY(3), 0x00000000 },
66 { DC_COM_PIN_OUTPUT_POLARITY(2), 0x00000000 },
67 { DC_COM_PIN_OUTPUT_POLARITY(1), 0x00000000 },
68 { DC_COM_PIN_OUTPUT_POLARITY(0), 0x00000000 },
69 { DC_COM_PIN_OUTPUT_ENABLE(3), 0x55555555 },
70 { DC_COM_PIN_OUTPUT_ENABLE(2), 0x55555555 },
71 { DC_COM_PIN_OUTPUT_ENABLE(1), 0x55150005 },
72 { DC_COM_PIN_OUTPUT_ENABLE(0), 0x55555555 },
75 static void tegra_dc_write_regs(struct tegra_dc *dc,
76 const struct reg_entry *table,
81 for (i = 0; i < num; i++)
82 tegra_dc_writel(dc, table[i].value, table[i].offset);
85 static int tegra_output_rgb_enable(struct tegra_output *output)
87 struct tegra_dc *dc = to_tegra_dc(output->encoder.crtc);
89 tegra_dc_write_regs(dc, rgb_enable, ARRAY_SIZE(rgb_enable));
94 static int tegra_output_rgb_disable(struct tegra_output *output)
96 struct tegra_dc *dc = to_tegra_dc(output->encoder.crtc);
98 tegra_dc_write_regs(dc, rgb_disable, ARRAY_SIZE(rgb_disable));
103 static int tegra_output_rgb_setup_clock(struct tegra_output *output,
104 struct clk *clk, unsigned long pclk)
106 struct tegra_rgb *rgb = to_rgb(output);
108 return clk_set_parent(clk, rgb->clk_parent);
111 static int tegra_output_rgb_check_mode(struct tegra_output *output,
112 struct drm_display_mode *mode,
113 enum drm_mode_status *status)
116 * FIXME: For now, always assume that the mode is okay. There are
117 * unresolved issues with clk_round_rate(), which doesn't always
118 * reliably report whether a frequency can be set or not.
126 static const struct tegra_output_ops rgb_ops = {
127 .enable = tegra_output_rgb_enable,
128 .disable = tegra_output_rgb_disable,
129 .setup_clock = tegra_output_rgb_setup_clock,
130 .check_mode = tegra_output_rgb_check_mode,
133 int tegra_dc_rgb_probe(struct tegra_dc *dc)
135 struct device_node *np;
136 struct tegra_rgb *rgb;
139 np = of_get_child_by_name(dc->dev->of_node, "rgb");
140 if (!np || !of_device_is_available(np))
143 rgb = devm_kzalloc(dc->dev, sizeof(*rgb), GFP_KERNEL);
147 rgb->output.dev = dc->dev;
148 rgb->output.of_node = np;
150 err = tegra_output_probe(&rgb->output);
154 rgb->clk = devm_clk_get(dc->dev, NULL);
155 if (IS_ERR(rgb->clk)) {
156 dev_err(dc->dev, "failed to get clock\n");
157 return PTR_ERR(rgb->clk);
160 rgb->clk_parent = devm_clk_get(dc->dev, "parent");
161 if (IS_ERR(rgb->clk_parent)) {
162 dev_err(dc->dev, "failed to get parent clock\n");
163 return PTR_ERR(rgb->clk_parent);
166 err = clk_set_parent(rgb->clk, rgb->clk_parent);
168 dev_err(dc->dev, "failed to set parent clock: %d\n", err);
172 dc->rgb = &rgb->output;
177 int tegra_dc_rgb_remove(struct tegra_dc *dc)
184 err = tegra_output_remove(dc->rgb);
191 int tegra_dc_rgb_init(struct drm_device *drm, struct tegra_dc *dc)
193 struct tegra_rgb *rgb = to_rgb(dc->rgb);
199 rgb->output.type = TEGRA_OUTPUT_RGB;
200 rgb->output.ops = &rgb_ops;
202 err = tegra_output_init(dc->base.dev, &rgb->output);
204 dev_err(dc->dev, "output setup failed: %d\n", err);
209 * By default, outputs can be associated with each display controller.
210 * RGB outputs are an exception, so we make sure they can be attached
211 * to only their parent display controller.
213 rgb->output.encoder.possible_crtcs = 1 << dc->pipe;
218 int tegra_dc_rgb_exit(struct tegra_dc *dc)
223 err = tegra_output_disable(dc->rgb);
225 dev_err(dc->dev, "output failed to disable: %d\n", err);
229 err = tegra_output_exit(dc->rgb);
231 dev_err(dc->dev, "output cleanup failed: %d\n", err);