/* * Copyright (C) 2015 Free Electrons * Copyright (C) 2015 NextThing Co * * Maxime Ripard * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. */ #include #include #include #include #include #include #include "sun4i_crtc.h" #include "sun4i_tcon.h" #include "sun4i_rgb.h" struct sun4i_rgb { struct drm_connector connector; struct drm_encoder encoder; struct sun4i_tcon *tcon; }; static inline struct sun4i_rgb * drm_connector_to_sun4i_rgb(struct drm_connector *connector) { return container_of(connector, struct sun4i_rgb, connector); } static inline struct sun4i_rgb * drm_encoder_to_sun4i_rgb(struct drm_encoder *encoder) { return container_of(encoder, struct sun4i_rgb, encoder); } static int sun4i_rgb_get_modes(struct drm_connector *connector) { struct sun4i_rgb *rgb = drm_connector_to_sun4i_rgb(connector); struct sun4i_tcon *tcon = rgb->tcon; return drm_panel_get_modes(tcon->panel); } static int sun4i_rgb_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { struct sun4i_rgb *rgb = drm_connector_to_sun4i_rgb(connector); struct sun4i_tcon *tcon = rgb->tcon; u32 hsync = mode->hsync_end - mode->hsync_start; u32 vsync = mode->vsync_end - mode->vsync_start; unsigned long rate = mode->clock * 1000; long rounded_rate; DRM_DEBUG_DRIVER("Validating modes...\n"); if (hsync < 1) return MODE_HSYNC_NARROW; if (hsync > 0x3ff) return MODE_HSYNC_WIDE; if ((mode->hdisplay < 1) || (mode->htotal < 1)) return MODE_H_ILLEGAL; if ((mode->hdisplay > 0x7ff) || (mode->htotal > 0xfff)) return MODE_BAD_HVALUE; DRM_DEBUG_DRIVER("Horizontal parameters OK\n"); if (vsync < 1) return MODE_VSYNC_NARROW; if (vsync > 0x3ff) return MODE_VSYNC_WIDE; if ((mode->vdisplay < 1) || (mode->vtotal < 1)) return MODE_V_ILLEGAL; if ((mode->vdisplay > 0x7ff) || (mode->vtotal > 0xfff)) return MODE_BAD_VVALUE; DRM_DEBUG_DRIVER("Vertical parameters OK\n"); rounded_rate = clk_round_rate(tcon->dclk, rate); if (rounded_rate < rate) return MODE_CLOCK_LOW; if (rounded_rate > rate) return MODE_CLOCK_HIGH; DRM_DEBUG_DRIVER("Clock rate OK\n"); return MODE_OK; } static struct drm_connector_helper_funcs sun4i_rgb_con_helper_funcs = { .get_modes = sun4i_rgb_get_modes, .mode_valid = sun4i_rgb_mode_valid, }; static void sun4i_rgb_connector_destroy(struct drm_connector *connector) { struct sun4i_rgb *rgb = drm_connector_to_sun4i_rgb(connector); struct sun4i_tcon *tcon = rgb->tcon; drm_panel_detach(tcon->panel); drm_connector_cleanup(connector); } static const struct drm_connector_funcs sun4i_rgb_con_funcs = { .fill_modes = drm_helper_probe_single_connector_modes, .destroy = sun4i_rgb_connector_destroy, .reset = drm_atomic_helper_connector_reset, .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; static int sun4i_rgb_atomic_check(struct drm_encoder *encoder, struct drm_crtc_state *crtc_state, struct drm_connector_state *conn_state) { return 0; } static void sun4i_rgb_encoder_enable(struct drm_encoder *encoder) { struct sun4i_rgb *rgb = drm_encoder_to_sun4i_rgb(encoder); struct sun4i_tcon *tcon = rgb->tcon; DRM_DEBUG_DRIVER("Enabling RGB output\n"); if (!IS_ERR(tcon->panel)) drm_panel_prepare(tcon->panel); sun4i_tcon_channel_enable(tcon, 0); if (!IS_ERR(tcon->panel)) drm_panel_enable(tcon->panel); } static void sun4i_rgb_encoder_disable(struct drm_encoder *encoder) { struct sun4i_rgb *rgb = drm_encoder_to_sun4i_rgb(encoder); struct sun4i_tcon *tcon = rgb->tcon; DRM_DEBUG_DRIVER("Disabling RGB output\n"); if (!IS_ERR(tcon->panel)) drm_panel_disable(tcon->panel); sun4i_tcon_channel_disable(tcon, 0); if (!IS_ERR(tcon->panel)) drm_panel_unprepare(tcon->panel); } static void sun4i_rgb_encoder_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { struct sun4i_rgb *rgb = drm_encoder_to_sun4i_rgb(encoder); struct sun4i_tcon *tcon = rgb->tcon; sun4i_tcon0_mode_set(tcon, mode); sun4i_tcon_set_mux(tcon, 0, encoder); /* FIXME: This seems to be board specific */ clk_set_phase(tcon->dclk, 120); } static struct drm_encoder_helper_funcs sun4i_rgb_enc_helper_funcs = { .atomic_check = sun4i_rgb_atomic_check, .mode_set = sun4i_rgb_encoder_mode_set, .disable = sun4i_rgb_encoder_disable, .enable = sun4i_rgb_encoder_enable, }; static void sun4i_rgb_enc_destroy(struct drm_encoder *encoder) { drm_encoder_cleanup(encoder); } static struct drm_encoder_funcs sun4i_rgb_enc_funcs = { .destroy = sun4i_rgb_enc_destroy, }; int sun4i_rgb_init(struct drm_device *drm, struct sun4i_tcon *tcon) { struct drm_encoder *encoder; struct drm_bridge *bridge; struct sun4i_rgb *rgb; int ret; rgb = devm_kzalloc(drm->dev, sizeof(*rgb), GFP_KERNEL); if (!rgb) return -ENOMEM; rgb->tcon = tcon; encoder = &rgb->encoder; ret = drm_of_find_panel_or_bridge(tcon->dev->of_node, 1, 0, &tcon->panel, &bridge); if (ret) { dev_info(drm->dev, "No panel or bridge found... RGB output disabled\n"); return 0; } drm_encoder_helper_add(&rgb->encoder, &sun4i_rgb_enc_helper_funcs); ret = drm_encoder_init(drm, &rgb->encoder, &sun4i_rgb_enc_funcs, DRM_MODE_ENCODER_NONE, NULL); if (ret) { dev_err(drm->dev, "Couldn't initialise the rgb encoder\n"); goto err_out; } /* The RGB encoder can only work with the TCON channel 0 */ rgb->encoder.possible_crtcs = BIT(drm_crtc_index(&tcon->crtc->crtc)); if (tcon->panel) { drm_connector_helper_add(&rgb->connector, &sun4i_rgb_con_helper_funcs); ret = drm_connector_init(drm, &rgb->connector, &sun4i_rgb_con_funcs, DRM_MODE_CONNECTOR_Unknown); if (ret) { dev_err(drm->dev, "Couldn't initialise the rgb connector\n"); goto err_cleanup_connector; } drm_mode_connector_attach_encoder(&rgb->connector, &rgb->encoder); ret = drm_panel_attach(tcon->panel, &rgb->connector); if (ret) { dev_err(drm->dev, "Couldn't attach our panel\n"); goto err_cleanup_connector; } } if (bridge) { ret = drm_bridge_attach(encoder, bridge, NULL); if (ret) { dev_err(drm->dev, "Couldn't attach our bridge\n"); goto err_cleanup_connector; } } return 0; err_cleanup_connector: drm_encoder_cleanup(&rgb->encoder); err_out: return ret; } EXPORT_SYMBOL(sun4i_rgb_init);