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;
19 struct clk *clk_parent;
23 static inline struct tegra_rgb *to_rgb(struct tegra_output *output)
25 return container_of(output, struct tegra_rgb, output);
33 static const struct reg_entry rgb_enable[] = {
34 { DC_COM_PIN_OUTPUT_ENABLE(0), 0x00000000 },
35 { DC_COM_PIN_OUTPUT_ENABLE(1), 0x00000000 },
36 { DC_COM_PIN_OUTPUT_ENABLE(2), 0x00000000 },
37 { DC_COM_PIN_OUTPUT_ENABLE(3), 0x00000000 },
38 { DC_COM_PIN_OUTPUT_POLARITY(0), 0x00000000 },
39 { DC_COM_PIN_OUTPUT_POLARITY(1), 0x01000000 },
40 { DC_COM_PIN_OUTPUT_POLARITY(2), 0x00000000 },
41 { DC_COM_PIN_OUTPUT_POLARITY(3), 0x00000000 },
42 { DC_COM_PIN_OUTPUT_DATA(0), 0x00000000 },
43 { DC_COM_PIN_OUTPUT_DATA(1), 0x00000000 },
44 { DC_COM_PIN_OUTPUT_DATA(2), 0x00000000 },
45 { DC_COM_PIN_OUTPUT_DATA(3), 0x00000000 },
46 { DC_COM_PIN_OUTPUT_SELECT(0), 0x00000000 },
47 { DC_COM_PIN_OUTPUT_SELECT(1), 0x00000000 },
48 { DC_COM_PIN_OUTPUT_SELECT(2), 0x00000000 },
49 { DC_COM_PIN_OUTPUT_SELECT(3), 0x00000000 },
50 { DC_COM_PIN_OUTPUT_SELECT(4), 0x00210222 },
51 { DC_COM_PIN_OUTPUT_SELECT(5), 0x00002200 },
52 { DC_COM_PIN_OUTPUT_SELECT(6), 0x00020000 },
55 static const struct reg_entry rgb_disable[] = {
56 { DC_COM_PIN_OUTPUT_SELECT(6), 0x00000000 },
57 { DC_COM_PIN_OUTPUT_SELECT(5), 0x00000000 },
58 { DC_COM_PIN_OUTPUT_SELECT(4), 0x00000000 },
59 { DC_COM_PIN_OUTPUT_SELECT(3), 0x00000000 },
60 { DC_COM_PIN_OUTPUT_SELECT(2), 0x00000000 },
61 { DC_COM_PIN_OUTPUT_SELECT(1), 0x00000000 },
62 { DC_COM_PIN_OUTPUT_SELECT(0), 0x00000000 },
63 { DC_COM_PIN_OUTPUT_DATA(3), 0xaaaaaaaa },
64 { DC_COM_PIN_OUTPUT_DATA(2), 0xaaaaaaaa },
65 { DC_COM_PIN_OUTPUT_DATA(1), 0xaaaaaaaa },
66 { DC_COM_PIN_OUTPUT_DATA(0), 0xaaaaaaaa },
67 { DC_COM_PIN_OUTPUT_POLARITY(3), 0x00000000 },
68 { DC_COM_PIN_OUTPUT_POLARITY(2), 0x00000000 },
69 { DC_COM_PIN_OUTPUT_POLARITY(1), 0x00000000 },
70 { DC_COM_PIN_OUTPUT_POLARITY(0), 0x00000000 },
71 { DC_COM_PIN_OUTPUT_ENABLE(3), 0x55555555 },
72 { DC_COM_PIN_OUTPUT_ENABLE(2), 0x55555555 },
73 { DC_COM_PIN_OUTPUT_ENABLE(1), 0x55150005 },
74 { DC_COM_PIN_OUTPUT_ENABLE(0), 0x55555555 },
77 static void tegra_dc_write_regs(struct tegra_dc *dc,
78 const struct reg_entry *table,
83 for (i = 0; i < num; i++)
84 tegra_dc_writel(dc, table[i].value, table[i].offset);
87 static int tegra_output_rgb_enable(struct tegra_output *output)
89 struct tegra_rgb *rgb = to_rgb(output);
91 tegra_dc_write_regs(rgb->dc, rgb_enable, ARRAY_SIZE(rgb_enable));
96 static int tegra_output_rgb_disable(struct tegra_output *output)
98 struct tegra_rgb *rgb = to_rgb(output);
100 tegra_dc_write_regs(rgb->dc, rgb_disable, ARRAY_SIZE(rgb_disable));
105 static int tegra_output_rgb_setup_clock(struct tegra_output *output,
106 struct clk *clk, unsigned long pclk)
108 struct tegra_rgb *rgb = to_rgb(output);
110 return clk_set_parent(clk, rgb->clk_parent);
113 static int tegra_output_rgb_check_mode(struct tegra_output *output,
114 struct drm_display_mode *mode,
115 enum drm_mode_status *status)
118 * FIXME: For now, always assume that the mode is okay. There are
119 * unresolved issues with clk_round_rate(), which doesn't always
120 * reliably report whether a frequency can be set or not.
128 static const struct tegra_output_ops rgb_ops = {
129 .enable = tegra_output_rgb_enable,
130 .disable = tegra_output_rgb_disable,
131 .setup_clock = tegra_output_rgb_setup_clock,
132 .check_mode = tegra_output_rgb_check_mode,
135 int tegra_dc_rgb_probe(struct tegra_dc *dc)
137 struct device_node *np;
138 struct tegra_rgb *rgb;
141 np = of_get_child_by_name(dc->dev->of_node, "rgb");
142 if (!np || !of_device_is_available(np))
145 rgb = devm_kzalloc(dc->dev, sizeof(*rgb), GFP_KERNEL);
149 rgb->output.dev = dc->dev;
150 rgb->output.of_node = np;
153 err = tegra_output_probe(&rgb->output);
157 rgb->clk = devm_clk_get(dc->dev, NULL);
158 if (IS_ERR(rgb->clk)) {
159 dev_err(dc->dev, "failed to get clock\n");
160 return PTR_ERR(rgb->clk);
163 rgb->clk_parent = devm_clk_get(dc->dev, "parent");
164 if (IS_ERR(rgb->clk_parent)) {
165 dev_err(dc->dev, "failed to get parent clock\n");
166 return PTR_ERR(rgb->clk_parent);
169 err = clk_set_parent(rgb->clk, rgb->clk_parent);
171 dev_err(dc->dev, "failed to set parent clock: %d\n", err);
175 dc->rgb = &rgb->output;
180 int tegra_dc_rgb_remove(struct tegra_dc *dc)
187 err = tegra_output_remove(dc->rgb);
194 int tegra_dc_rgb_init(struct drm_device *drm, struct tegra_dc *dc)
196 struct tegra_rgb *rgb = to_rgb(dc->rgb);
202 rgb->output.type = TEGRA_OUTPUT_RGB;
203 rgb->output.ops = &rgb_ops;
205 err = tegra_output_init(dc->base.dev, &rgb->output);
207 dev_err(dc->dev, "output setup failed: %d\n", err);
212 * By default, outputs can be associated with each display controller.
213 * RGB outputs are an exception, so we make sure they can be attached
214 * to only their parent display controller.
216 rgb->output.encoder.possible_crtcs = 1 << dc->pipe;
221 int tegra_dc_rgb_exit(struct tegra_dc *dc)
226 err = tegra_output_disable(dc->rgb);
228 dev_err(dc->dev, "output failed to disable: %d\n", err);
232 err = tegra_output_exit(dc->rgb);
234 dev_err(dc->dev, "output cleanup failed: %d\n", err);