1 // SPDX-License-Identifier: GPL-2.0-or-later
6  * Maxime Ripard <maxime.ripard@free-electrons.com>
27 	struct sun4i_tcon	*tcon;  member
51 	return drm_panel_get_modes(rgb->panel, connector);  in sun4i_rgb_get_modes()
57  * good default tolerance for the EDID-based modes. Define it to 5 per
66 	struct sun4i_tcon *tcon = rgb->tcon;  in sun4i_rgb_mode_valid()  local
67 	u32 hsync = mode->hsync_end - mode->hsync_start;  in sun4i_rgb_mode_valid()
68 	u32 vsync = mode->vsync_end - mode->vsync_start;  in sun4i_rgb_mode_valid()
69 	unsigned long long rate = mode->clock * 1000;  in sun4i_rgb_mode_valid()
81 	if ((mode->hdisplay < 1) || (mode->htotal < 1))  in sun4i_rgb_mode_valid()
84 	if ((mode->hdisplay > 0x7ff) || (mode->htotal > 0xfff))  in sun4i_rgb_mode_valid()
95 	if ((mode->vdisplay < 1) || (mode->vtotal < 1))  in sun4i_rgb_mode_valid()
98 	if ((mode->vdisplay > 0x7ff) || (mode->vtotal > 0xfff))  in sun4i_rgb_mode_valid()
109 	if (rgb->panel) {  in sun4i_rgb_mode_valid()
118 	if (!rgb->bridge)  in sun4i_rgb_mode_valid()
121 	tcon->dclk_min_div = 6;  in sun4i_rgb_mode_valid()
122 	tcon->dclk_max_div = 127;  in sun4i_rgb_mode_valid()
123 	rounded_rate = clk_round_rate(tcon->dclk, rate);  in sun4i_rgb_mode_valid()
125 	lowest = rate * (1000 - SUN4I_RGB_DOTCLOCK_TOLERANCE_PER_MILLE);  in sun4i_rgb_mode_valid()
165 	if (rgb->panel) {  in sun4i_rgb_encoder_enable()
166 		drm_panel_prepare(rgb->panel);  in sun4i_rgb_encoder_enable()
167 		drm_panel_enable(rgb->panel);  in sun4i_rgb_encoder_enable()
177 	if (rgb->panel) {  in sun4i_rgb_encoder_disable()
178 		drm_panel_disable(rgb->panel);  in sun4i_rgb_encoder_disable()
179 		drm_panel_unprepare(rgb->panel);  in sun4i_rgb_encoder_disable()
189 int sun4i_rgb_init(struct drm_device *drm, struct sun4i_tcon *tcon)  in sun4i_rgb_init()  argument
195 	rgb = devm_kzalloc(drm->dev, sizeof(*rgb), GFP_KERNEL);  in sun4i_rgb_init()
197 		return -ENOMEM;  in sun4i_rgb_init()
198 	rgb->tcon = tcon;  in sun4i_rgb_init()
199 	encoder = &rgb->encoder;  in sun4i_rgb_init()
201 	ret = drm_of_find_panel_or_bridge(tcon->dev->of_node, 1, 0,  in sun4i_rgb_init()
202 					  &rgb->panel, &rgb->bridge);  in sun4i_rgb_init()
204 		dev_info(drm->dev, "No panel or bridge found... RGB output disabled\n");  in sun4i_rgb_init()
208 	drm_encoder_helper_add(&rgb->encoder,  in sun4i_rgb_init()
210 	ret = drm_simple_encoder_init(drm, &rgb->encoder,  in sun4i_rgb_init()
213 		dev_err(drm->dev, "Couldn't initialise the rgb encoder\n");  in sun4i_rgb_init()
217 	/* The RGB encoder can only work with the TCON channel 0 */  in sun4i_rgb_init()
218 	rgb->encoder.possible_crtcs = drm_crtc_mask(&tcon->crtc->crtc);  in sun4i_rgb_init()
220 	if (rgb->panel) {  in sun4i_rgb_init()
221 		drm_connector_helper_add(&rgb->connector,  in sun4i_rgb_init()
223 		ret = drm_connector_init(drm, &rgb->connector,  in sun4i_rgb_init()
227 			dev_err(drm->dev, "Couldn't initialise the rgb connector\n");  in sun4i_rgb_init()
231 		drm_connector_attach_encoder(&rgb->connector,  in sun4i_rgb_init()
232 						  &rgb->encoder);  in sun4i_rgb_init()
235 	if (rgb->bridge) {  in sun4i_rgb_init()
236 		ret = drm_bridge_attach(encoder, rgb->bridge, NULL, 0);  in sun4i_rgb_init()
244 	drm_encoder_cleanup(&rgb->encoder);  in sun4i_rgb_init()