diff options
Diffstat (limited to 'drivers/gpu/drm/imx/dw_hdmi-imx.c')
| -rw-r--r-- | drivers/gpu/drm/imx/dw_hdmi-imx.c | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imx/dw_hdmi-imx.c b/drivers/gpu/drm/imx/dw_hdmi-imx.c new file mode 100644 index 00000000000..121d30ca2d4 --- /dev/null +++ b/drivers/gpu/drm/imx/dw_hdmi-imx.c @@ -0,0 +1,258 @@ +/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc. + * + * derived from imx-hdmi.c(renamed to bridge/dw_hdmi.c now) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/component.h> +#include <linux/mfd/syscon.h> +#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> +#include <drm/bridge/dw_hdmi.h> +#include <video/imx-ipu-v3.h> +#include <linux/regmap.h> +#include <drm/drm_of.h> +#include <drm/drmP.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_edid.h> +#include <drm/drm_encoder_slave.h> + +#include "imx-drm.h" + +struct imx_hdmi { + struct device *dev; + struct drm_encoder encoder; + struct regmap *regmap; +}; + +static const struct dw_hdmi_mpll_config imx_mpll_cfg[] = { + { + 45250000, { + { 0x01e0, 0x0000 }, + { 0x21e1, 0x0000 }, + { 0x41e2, 0x0000 } + }, + }, { + 92500000, { + { 0x0140, 0x0005 }, + { 0x2141, 0x0005 }, + { 0x4142, 0x0005 }, + }, + }, { + 148500000, { + { 0x00a0, 0x000a }, + { 0x20a1, 0x000a }, + { 0x40a2, 0x000a }, + }, + }, { + ~0UL, { + { 0x00a0, 0x000a }, + { 0x2001, 0x000f }, + { 0x4002, 0x000f }, + }, + } +}; + +static const struct dw_hdmi_curr_ctrl imx_cur_ctr[] = { + /* pixelclk bpp8 bpp10 bpp12 */ + { + 54000000, { 0x091c, 0x091c, 0x06dc }, + }, { + 58400000, { 0x091c, 0x06dc, 0x06dc }, + }, { + 72000000, { 0x06dc, 0x06dc, 0x091c }, + }, { + 74250000, { 0x06dc, 0x0b5c, 0x091c }, + }, { + 118800000, { 0x091c, 0x091c, 0x06dc }, + }, { + 216000000, { 0x06dc, 0x0b5c, 0x091c }, + } +}; + +static const struct dw_hdmi_sym_term imx_sym_term[] = { + /*pixelclk symbol term*/ + { 148500000, 0x800d, 0x0005 }, + { ~0UL, 0x0000, 0x0000 } +}; + +static int dw_hdmi_imx_parse_dt(struct imx_hdmi *hdmi) +{ + struct device_node *np = hdmi->dev->of_node; + + hdmi->regmap = syscon_regmap_lookup_by_phandle(np, "gpr"); + if (IS_ERR(hdmi->regmap)) { + dev_err(hdmi->dev, "Unable to get gpr\n"); + return PTR_ERR(hdmi->regmap); + } + + return 0; +} + +static void dw_hdmi_imx_encoder_disable(struct drm_encoder *encoder) +{ +} + +static bool dw_hdmi_imx_encoder_mode_fixup(struct drm_encoder *encoder, + const struct drm_display_mode *mode, + struct drm_display_mode *adj_mode) +{ + return true; +} + +static void dw_hdmi_imx_encoder_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adj_mode) +{ +} + +static void dw_hdmi_imx_encoder_commit(struct drm_encoder *encoder) +{ + struct imx_hdmi *hdmi = container_of(encoder, struct imx_hdmi, encoder); + int mux = imx_drm_encoder_get_mux_id(hdmi->dev->of_node, encoder); + + regmap_update_bits(hdmi->regmap, IOMUXC_GPR3, + IMX6Q_GPR3_HDMI_MUX_CTL_MASK, + mux << IMX6Q_GPR3_HDMI_MUX_CTL_SHIFT); +} + +static void dw_hdmi_imx_encoder_prepare(struct drm_encoder *encoder) +{ + imx_drm_panel_format(encoder, V4L2_PIX_FMT_RGB24); +} + +static struct drm_encoder_helper_funcs dw_hdmi_imx_encoder_helper_funcs = { + .mode_fixup = dw_hdmi_imx_encoder_mode_fixup, + .mode_set = dw_hdmi_imx_encoder_mode_set, + .prepare = dw_hdmi_imx_encoder_prepare, + .commit = dw_hdmi_imx_encoder_commit, + .disable = dw_hdmi_imx_encoder_disable, +}; + +static struct drm_encoder_funcs dw_hdmi_imx_encoder_funcs = { + .destroy = drm_encoder_cleanup, +}; + +static struct dw_hdmi_plat_data imx6q_hdmi_drv_data = { + .mpll_cfg = imx_mpll_cfg, + .cur_ctr = imx_cur_ctr, + .sym_term = imx_sym_term, + .dev_type = IMX6Q_HDMI, +}; + +static struct dw_hdmi_plat_data imx6dl_hdmi_drv_data = { + .mpll_cfg = imx_mpll_cfg, + .cur_ctr = imx_cur_ctr, + .sym_term = imx_sym_term, + .dev_type = IMX6DL_HDMI, +}; + +static const struct of_device_id dw_hdmi_imx_dt_ids[] = { + { .compatible = "fsl,imx6q-hdmi", + .data = &imx6q_hdmi_drv_data + }, { + .compatible = "fsl,imx6dl-hdmi", + .data = &imx6dl_hdmi_drv_data + }, + {}, +}; +MODULE_DEVICE_TABLE(of, dw_hdmi_imx_dt_ids); + +static int dw_hdmi_imx_bind(struct device *dev, struct device *master, + void *data) +{ + struct platform_device *pdev = to_platform_device(dev); + const struct dw_hdmi_plat_data *plat_data; + const struct of_device_id *match; + struct drm_device *drm = data; + struct drm_encoder *encoder; + struct imx_hdmi *hdmi; + struct resource *iores; + int irq; + int ret; + + if (!pdev->dev.of_node) + return -ENODEV; + + hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); + if (!hdmi) + return -ENOMEM; + + match = of_match_node(dw_hdmi_imx_dt_ids, pdev->dev.of_node); + plat_data = match->data; + hdmi->dev = &pdev->dev; + encoder = &hdmi->encoder; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!iores) + return -ENXIO; + + platform_set_drvdata(pdev, hdmi); + + encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node); + /* + * If we failed to find the CRTC(s) which this encoder is + * supposed to be connected to, it's because the CRTC has + * not been registered yet. Defer probing, and hope that + * the required CRTC is added later. + */ + if (encoder->possible_crtcs == 0) + return -EPROBE_DEFER; + + ret = dw_hdmi_imx_parse_dt(hdmi); + if (ret < 0) + return ret; + + drm_encoder_helper_add(encoder, &dw_hdmi_imx_encoder_helper_funcs); + drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs, + DRM_MODE_ENCODER_TMDS); + + return dw_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data); +} + +static void dw_hdmi_imx_unbind(struct device *dev, struct device *master, + void *data) +{ + return dw_hdmi_unbind(dev, master, data); +} + +static const struct component_ops dw_hdmi_imx_ops = { + .bind = dw_hdmi_imx_bind, + .unbind = dw_hdmi_imx_unbind, +}; + +static int dw_hdmi_imx_probe(struct platform_device *pdev) +{ + return component_add(&pdev->dev, &dw_hdmi_imx_ops); +} + +static int dw_hdmi_imx_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &dw_hdmi_imx_ops); + + return 0; +} + +static struct platform_driver dw_hdmi_imx_platform_driver = { + .probe = dw_hdmi_imx_probe, + .remove = dw_hdmi_imx_remove, + .driver = { + .name = "dwhdmi-imx", + .of_match_table = dw_hdmi_imx_dt_ids, + }, +}; + +module_platform_driver(dw_hdmi_imx_platform_driver); + +MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>"); +MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>"); +MODULE_DESCRIPTION("IMX6 Specific DW-HDMI Driver Extension"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:dwhdmi-imx"); |