1 files changed, 265 insertions, 0 deletions

diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c
new file mode 100644
index 000000000000..5eebd15899b1
--- /dev/null
+++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c
@@ -0,0 +1,265 @@
+/*
+ * Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/of_graph.h>
+
+#include "adv7511.h"
+
+static const struct reg_sequence adv7533_fixed_registers[] = {
+        { 0x16, 0x20 },
+        { 0x9a, 0xe0 },
+        { 0xba, 0x70 },
+        { 0xde, 0x82 },
+        { 0xe4, 0x40 },
+        { 0xe5, 0x80 },
+};
+
+static const struct reg_sequence adv7533_cec_fixed_registers[] = {
+        { 0x15, 0xd0 },
+        { 0x17, 0xd0 },
+        { 0x24, 0x20 },
+        { 0x57, 0x11 },
+};
+
+static const struct regmap_config adv7533_cec_regmap_config = {
+        .reg_bits = 8,
+        .val_bits = 8,
+
+        .max_register = 0xff,
+        .cache_type = REGCACHE_RBTREE,
+};
+
+static void adv7511_dsi_config_timing_gen(struct adv7511 *adv)
+{
+        struct mipi_dsi_device *dsi = adv->dsi;
+        struct drm_display_mode *mode = &adv->curr_mode;
+        unsigned int hsw, hfp, hbp, vsw, vfp, vbp;
+        u8 clock_div_by_lanes[] = { 6, 4, 3 };  /* 2, 3, 4 lanes */
+
+        hsw = mode->hsync_end - mode->hsync_start;
+        hfp = mode->hsync_start - mode->hdisplay;
+        hbp = mode->htotal - mode->hsync_end;
+        vsw = mode->vsync_end - mode->vsync_start;
+        vfp = mode->vsync_start - mode->vdisplay;
+        vbp = mode->vtotal - mode->vsync_end;
+
+        /* set pixel clock divider mode */
+        regmap_write(adv->regmap_cec, 0x16,
+                     clock_div_by_lanes[dsi->lanes - 2] << 3);
+
+        /* horizontal porch params */
+        regmap_write(adv->regmap_cec, 0x28, mode->htotal >> 4);
+        regmap_write(adv->regmap_cec, 0x29, (mode->htotal << 4) & 0xff);
+        regmap_write(adv->regmap_cec, 0x2a, hsw >> 4);
+        regmap_write(adv->regmap_cec, 0x2b, (hsw << 4) & 0xff);
+        regmap_write(adv->regmap_cec, 0x2c, hfp >> 4);
+        regmap_write(adv->regmap_cec, 0x2d, (hfp << 4) & 0xff);
+        regmap_write(adv->regmap_cec, 0x2e, hbp >> 4);
+        regmap_write(adv->regmap_cec, 0x2f, (hbp << 4) & 0xff);
+
+        /* vertical porch params */
+        regmap_write(adv->regmap_cec, 0x30, mode->vtotal >> 4);
+        regmap_write(adv->regmap_cec, 0x31, (mode->vtotal << 4) & 0xff);
+        regmap_write(adv->regmap_cec, 0x32, vsw >> 4);
+        regmap_write(adv->regmap_cec, 0x33, (vsw << 4) & 0xff);
+        regmap_write(adv->regmap_cec, 0x34, vfp >> 4);
+        regmap_write(adv->regmap_cec, 0x35, (vfp << 4) & 0xff);
+        regmap_write(adv->regmap_cec, 0x36, vbp >> 4);
+        regmap_write(adv->regmap_cec, 0x37, (vbp << 4) & 0xff);
+}
+
+void adv7533_dsi_power_on(struct adv7511 *adv)
+{
+        struct mipi_dsi_device *dsi = adv->dsi;
+
+        if (adv->use_timing_gen)
+                adv7511_dsi_config_timing_gen(adv);
+
+        /* set number of dsi lanes */
+        regmap_write(adv->regmap_cec, 0x1c, dsi->lanes << 4);
+
+        if (adv->use_timing_gen) {
+                /* reset internal timing generator */
+                regmap_write(adv->regmap_cec, 0x27, 0xcb);
+                regmap_write(adv->regmap_cec, 0x27, 0x8b);
+                regmap_write(adv->regmap_cec, 0x27, 0xcb);
+        } else {
+                /* disable internal timing generator */
+                regmap_write(adv->regmap_cec, 0x27, 0x0b);
+        }
+
+        /* enable hdmi */
+        regmap_write(adv->regmap_cec, 0x03, 0x89);
+        /* disable test mode */
+        regmap_write(adv->regmap_cec, 0x55, 0x00);
+
+        regmap_register_patch(adv->regmap_cec, adv7533_cec_fixed_registers,
+                              ARRAY_SIZE(adv7533_cec_fixed_registers));
+}
+
+void adv7533_dsi_power_off(struct adv7511 *adv)
+{
+        /* disable hdmi */
+        regmap_write(adv->regmap_cec, 0x03, 0x0b);
+        /* disable internal timing generator */
+        regmap_write(adv->regmap_cec, 0x27, 0x0b);
+}
+
+void adv7533_mode_set(struct adv7511 *adv, struct drm_display_mode *mode)
+{
+        struct mipi_dsi_device *dsi = adv->dsi;
+        int lanes, ret;
+
+        if (adv->num_dsi_lanes != 4)
+                return;
+
+        if (mode->clock > 80000)
+                lanes = 4;
+        else
+                lanes = 3;
+
+        if (lanes != dsi->lanes) {
+                mipi_dsi_detach(dsi);
+                dsi->lanes = lanes;
+                ret = mipi_dsi_attach(dsi);
+                if (ret)
+                        dev_err(&dsi->dev, "failed to change host lanes\n");
+        }
+}
+
+int adv7533_patch_registers(struct adv7511 *adv)
+{
+        return regmap_register_patch(adv->regmap,
+                                     adv7533_fixed_registers,
+                                     ARRAY_SIZE(adv7533_fixed_registers));
+}
+
+void adv7533_uninit_cec(struct adv7511 *adv)
+{
+        i2c_unregister_device(adv->i2c_cec);
+}
+
+static const int cec_i2c_addr = 0x78;
+
+int adv7533_init_cec(struct adv7511 *adv)
+{
+        int ret;
+
+        adv->i2c_cec = i2c_new_dummy(adv->i2c_main->adapter, cec_i2c_addr >> 1);
+        if (!adv->i2c_cec)
+                return -ENOMEM;
+
+        adv->regmap_cec = devm_regmap_init_i2c(adv->i2c_cec,
+                                        &adv7533_cec_regmap_config);
+        if (IS_ERR(adv->regmap_cec)) {
+                ret = PTR_ERR(adv->regmap_cec);
+                goto err;
+        }
+
+        ret = regmap_register_patch(adv->regmap_cec,
+                                    adv7533_cec_fixed_registers,
+                                    ARRAY_SIZE(adv7533_cec_fixed_registers));
+        if (ret)
+                goto err;
+
+        return 0;
+err:
+        adv7533_uninit_cec(adv);
+        return ret;
+}
+
+int adv7533_attach_dsi(struct adv7511 *adv)
+{
+        struct device *dev = &adv->i2c_main->dev;
+        struct mipi_dsi_host *host;
+        struct mipi_dsi_device *dsi;
+        int ret = 0;
+        const struct mipi_dsi_device_info info = { .type = "adv7533",
+                                                   .channel = 0,
+                                                   .node = NULL,
+                                                 };
+
+        host = of_find_mipi_dsi_host_by_node(adv->host_node);
+        if (!host) {
+                dev_err(dev, "failed to find dsi host\n");
+                return -EPROBE_DEFER;
+        }
+
+        dsi = mipi_dsi_device_register_full(host, &info);
+        if (IS_ERR(dsi)) {
+                dev_err(dev, "failed to create dsi device\n");
+                ret = PTR_ERR(dsi);
+                goto err_dsi_device;
+        }
+
+        adv->dsi = dsi;
+
+        dsi->lanes = adv->num_dsi_lanes;
+        dsi->format = MIPI_DSI_FMT_RGB888;
+        dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+                          MIPI_DSI_MODE_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE;
+
+        ret = mipi_dsi_attach(dsi);
+        if (ret < 0) {
+                dev_err(dev, "failed to attach dsi to host\n");
+                goto err_dsi_attach;
+        }
+
+        return 0;
+
+err_dsi_attach:
+        mipi_dsi_device_unregister(dsi);
+err_dsi_device:
+        return ret;
+}
+
+void adv7533_detach_dsi(struct adv7511 *adv)
+{
+        mipi_dsi_detach(adv->dsi);
+        mipi_dsi_device_unregister(adv->dsi);
+}
+
+int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv)
+{
+        u32 num_lanes;
+        struct device_node *endpoint;
+
+        of_property_read_u32(np, "adi,dsi-lanes", &num_lanes);
+
+        if (num_lanes < 1 || num_lanes > 4)
+                return -EINVAL;
+
+        adv->num_dsi_lanes = num_lanes;
+
+        endpoint = of_graph_get_next_endpoint(np, NULL);
+        if (!endpoint)
+                return -ENODEV;
+
+        adv->host_node = of_graph_get_remote_port_parent(endpoint);
+        if (!adv->host_node) {
+                of_node_put(endpoint);
+                return -ENODEV;
+        }
+
+        of_node_put(endpoint);
+        of_node_put(adv->host_node);
+
+        adv->use_timing_gen = !of_property_read_bool(np,
+                                                "adi,disable-timing-generator");
+
+        /* TODO: Check if these need to be parsed by DT or not */
+        adv->rgb = true;
+        adv->embedded_sync = false;
+
+        return 0;
+}