1 // SPDX-License-Identifier: GPL-2.0+
3  * i.MX drm driver - parallel display implementation
9 #include <linux/media-bus-format.h>
22 #include <drm/bridge/imx.h>
24 #include "imx-drm.h"
28 	struct drm_bridge bridge;  member
40 	return container_of(b, struct imx_parallel_display_encoder, bridge)->pd;  in bridge_to_imxpd()
53 imx_pd_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,  in imx_pd_bridge_atomic_get_output_bus_fmts()  argument
59 	struct drm_display_info *di = &conn_state->connector->display_info;  in imx_pd_bridge_atomic_get_output_bus_fmts()
60 	struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);  in imx_pd_bridge_atomic_get_output_bus_fmts()
63 	if (!imxpd->bus_format && !di->num_bus_formats) {  in imx_pd_bridge_atomic_get_output_bus_fmts()
74 	if (!imxpd->bus_format && di->num_bus_formats)  in imx_pd_bridge_atomic_get_output_bus_fmts()
75 		output_fmts[0] = di->bus_formats[0];  in imx_pd_bridge_atomic_get_output_bus_fmts()
77 		output_fmts[0] = imxpd->bus_format;  in imx_pd_bridge_atomic_get_output_bus_fmts()
95 imx_pd_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,  in imx_pd_bridge_atomic_get_input_bus_fmts()  argument
102 	struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);  in imx_pd_bridge_atomic_get_input_bus_fmts()
106 	 * If the next bridge does not support bus format negotiation, let's  in imx_pd_bridge_atomic_get_input_bus_fmts()
107 	 * use the static bus format definition (imxpd->bus_format) if it's  in imx_pd_bridge_atomic_get_input_bus_fmts()
111 		output_fmt = imxpd->bus_format ? : MEDIA_BUS_FMT_RGB888_1X24;  in imx_pd_bridge_atomic_get_input_bus_fmts()
114 	if ((imxpd->bus_format && imxpd->bus_format != output_fmt) ||  in imx_pd_bridge_atomic_get_input_bus_fmts()
129 static int imx_pd_bridge_atomic_check(struct drm_bridge *bridge,  in imx_pd_bridge_atomic_check()  argument
135 	struct drm_display_info *di = &conn_state->connector->display_info;  in imx_pd_bridge_atomic_check()
140 	next_bridge = drm_bridge_get_next_bridge(bridge);  in imx_pd_bridge_atomic_check()
142 		next_bridge_state = drm_atomic_get_new_bridge_state(crtc_state->state,  in imx_pd_bridge_atomic_check()
146 		bus_flags = next_bridge_state->input_bus_cfg.flags;  in imx_pd_bridge_atomic_check()
148 		bus_flags = di->bus_flags;  in imx_pd_bridge_atomic_check()
150 	bus_fmt = bridge_state->input_bus_cfg.format;  in imx_pd_bridge_atomic_check()
152 		return -EINVAL;  in imx_pd_bridge_atomic_check()
154 	bridge_state->output_bus_cfg.flags = bus_flags;  in imx_pd_bridge_atomic_check()
155 	bridge_state->input_bus_cfg.flags = bus_flags;  in imx_pd_bridge_atomic_check()
156 	imx_crtc_state->bus_flags = bus_flags;  in imx_pd_bridge_atomic_check()
157 	imx_crtc_state->bus_format = bridge_state->input_bus_cfg.format;  in imx_pd_bridge_atomic_check()
158 	imx_crtc_state->di_hsync_pin = 2;  in imx_pd_bridge_atomic_check()
159 	imx_crtc_state->di_vsync_pin = 3;  in imx_pd_bridge_atomic_check()
164 static int imx_pd_bridge_attach(struct drm_bridge *bridge,  in imx_pd_bridge_attach()  argument
167 	struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);  in imx_pd_bridge_attach()
169 	return drm_bridge_attach(bridge->encoder, imxpd->next_bridge, bridge, flags);  in imx_pd_bridge_attach()
189 	struct drm_bridge *bridge;  in imx_pd_bind()  local
197 	imxpd_encoder->pd = imxpd;  in imx_pd_bind()
198 	encoder = &imxpd_encoder->encoder;  in imx_pd_bind()
199 	bridge = &imxpd_encoder->bridge;  in imx_pd_bind()
201 	ret = imx_drm_encoder_parse_of(drm, encoder, imxpd->dev->of_node);  in imx_pd_bind()
205 	bridge->funcs = &imx_pd_bridge_funcs;  in imx_pd_bind()
206 	drm_bridge_attach(encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);  in imx_pd_bind()
223 	struct device *dev = &pdev->dev;  in imx_pd_probe()
224 	struct device_node *np = dev->of_node;  in imx_pd_probe()
232 		return -ENOMEM;  in imx_pd_probe()
235 	imxpd->next_bridge = devm_drm_of_get_bridge(dev, np, 1, 0);  in imx_pd_probe()
236 	if (imxpd->next_bridge == ERR_PTR(-ENODEV))  in imx_pd_probe()
237 		imxpd->next_bridge = devm_imx_drm_legacy_bridge(dev, np, DRM_MODE_CONNECTOR_DPI);  in imx_pd_probe()
238 	if (IS_ERR(imxpd->next_bridge)) {  in imx_pd_probe()
239 		ret = PTR_ERR(imxpd->next_bridge);  in imx_pd_probe()
243 	ret = of_property_read_string(np, "interface-pix-fmt", &fmt);  in imx_pd_probe()
254 	imxpd->bus_format = bus_format;  in imx_pd_probe()
256 	imxpd->dev = dev;  in imx_pd_probe()
265 	component_del(&pdev->dev, &imx_pd_ops);  in imx_pd_remove()
269 	{ .compatible = "fsl,imx-parallel-display", },
279 		.name	= "imx-parallel-display",
285 MODULE_DESCRIPTION("i.MX parallel display driver");
288 MODULE_ALIAS("platform:imx-parallel-display");