[PATCH v8 7/9] drm: bridge/dw_hdmi: convert dw-hdmi to drm_bridge mode

From: Yakir Yang ykk@rock-chips.com

keep the connector & birdge in dw_hdmi.c, handle encoder in dw_hdmi-imx.c, as most of the encoder operation are platform specific such as crtc select and panel format set

Signed-off-by: Andy Yan andy.yan@rock-chips.com Signed-off-by: Yakir Yang ykk@rock-chips.com

---

Changes in v8: None Changes in v7: None Changes in v6: - move some modification from patch#5

Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None

drivers/gpu/drm/bridge/dw_hdmi.c | 228 +++++++++++++++------------------- drivers/staging/imx-drm/dw_hdmi-imx.c | 145 ++++++++++++++------- include/drm/bridge/dw_hdmi.h | 13 +- 3 files changed, 199 insertions(+), 187 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c index 978c709..ed75147 100644 --- a/drivers/gpu/drm/bridge/dw_hdmi.c +++ b/drivers/gpu/drm/bridge/dw_hdmi.c @@ -11,7 +11,6 @@ * Copyright (C) 2010, Guennadi Liakhovetski g.liakhovetski@gmx.de */

-#include <linux/component.h> #include <linux/irq.h> #include <linux/delay.h> #include <linux/err.h> @@ -108,7 +107,8 @@ union dw_reg_ptr {

struct dw_hdmi { struct drm_connector connector; - struct drm_encoder encoder; + struct drm_encoder *encoder; + struct drm_bridge *bridge;

enum dw_hdmi_devtype dev_type; struct device *dev; @@ -1319,6 +1319,50 @@ static void dw_hdmi_poweroff(struct dw_hdmi *hdmi) dw_hdmi_phy_disable(hdmi); }

+static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct dw_hdmi *hdmi = bridge->driver_private; + + dw_hdmi_setup(hdmi, mode); + + /* Store the display mode for plugin/DKMS poweron events */ + memcpy(&hdmi->previous_mode, mode, sizeof(hdmi->previous_mode)); +} + +static bool dw_hdmi_bridge_mode_fixup(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + return true; +} + +static void dw_hdmi_bridge_disable(struct drm_bridge *bridge) +{ + struct dw_hdmi *hdmi = bridge->driver_private; + + dw_hdmi_poweroff(hdmi); +} + +static void dw_hdmi_bridge_enable(struct drm_bridge *bridge) +{ + struct dw_hdmi *hdmi = bridge->driver_private; + + dw_hdmi_poweron(hdmi); +} + +static void dw_hdmi_bridge_destroy(struct drm_bridge *bridge) +{ + drm_bridge_cleanup(bridge); + kfree(bridge); +} + +static void dw_hdmi_bridge_nope(struct drm_bridge *bridge) +{ + /* do nothing */ +} + static enum drm_connector_status dw_hdmi_connector_detect(struct drm_connector *connector, bool force) { @@ -1360,60 +1404,7 @@ static struct drm_encoder *dw_hdmi_connector_best_encoder(struct drm_connector struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi, connector);

- return &hdmi->encoder; -} - -static void dw_hdmi_encoder_mode_set(struct drm_encoder *encoder, - struct drm_display_mode *mode, - struct drm_display_mode *adjusted_mode) -{ - struct dw_hdmi *hdmi = container_of(encoder, struct dw_hdmi, encoder); - - dw_hdmi_setup(hdmi, mode); - - /* Store the display mode for plugin/DKMS poweron events */ - memcpy(&hdmi->previous_mode, mode, sizeof(hdmi->previous_mode)); -} - -static bool dw_hdmi_encoder_mode_fixup(struct drm_encoder *encoder, - const struct drm_display_mode *mode, - struct drm_display_mode *adjusted_mode) -{ - return true; -} - -static void dw_hdmi_encoder_disable(struct drm_encoder *encoder) -{ -} - -static void dw_hdmi_encoder_dpms(struct drm_encoder *encoder, int mode) -{ - struct dw_hdmi *hdmi = container_of(encoder, struct dw_hdmi, encoder); - - if (mode) - dw_hdmi_poweroff(hdmi); - else - dw_hdmi_poweron(hdmi); -} - -static void dw_hdmi_encoder_prepare(struct drm_encoder *encoder) -{ - struct dw_hdmi *hdmi = container_of(encoder, struct dw_hdmi, encoder); - - dw_hdmi_poweroff(hdmi); - - if (hdmi->plat_data->encoder_prepare) - hdmi->plat_data->encoder_prepare(&hdmi->connector, encoder); -} - -static void dw_hdmi_encoder_commit(struct drm_encoder *encoder) -{ - struct dw_hdmi *hdmi = container_of(encoder, struct dw_hdmi, encoder); - - if (hdmi->plat_data->encoder_commit) - hdmi->plat_data->encoder_commit(hdmi->priv, encoder); - - dw_hdmi_poweron(hdmi); + return hdmi->encoder; }

void dw_hdmi_connector_destroy(struct drm_connector *connector) @@ -1422,19 +1413,6 @@ void dw_hdmi_connector_destroy(struct drm_connector *connector) drm_connector_cleanup(connector); }

-static struct drm_encoder_funcs dw_hdmi_encoder_funcs = { - .destroy = drm_encoder_cleanup, -}; - -static struct drm_encoder_helper_funcs dw_hdmi_encoder_helper_funcs = { - .dpms = dw_hdmi_encoder_dpms, - .prepare = dw_hdmi_encoder_prepare, - .commit = dw_hdmi_encoder_commit, - .mode_set = dw_hdmi_encoder_mode_set, - .mode_fixup = dw_hdmi_encoder_mode_fixup, - .disable = dw_hdmi_encoder_disable, -}; - static struct drm_connector_funcs dw_hdmi_connector_funcs = { .dpms = drm_helper_connector_dpms, .fill_modes = drm_helper_probe_single_connector_modes, @@ -1447,6 +1425,16 @@ static struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = { .best_encoder = dw_hdmi_connector_best_encoder, };

+struct drm_bridge_funcs dw_hdmi_bridge_funcs = { + .enable = dw_hdmi_bridge_enable, + .disable = dw_hdmi_bridge_disable, + .pre_enable = dw_hdmi_bridge_nope, + .post_disable = dw_hdmi_bridge_nope, + .mode_set = dw_hdmi_bridge_mode_set, + .mode_fixup = dw_hdmi_bridge_mode_fixup, + .destroy = dw_hdmi_bridge_destroy, +}; + static irqreturn_t dw_hdmi_hardirq(int irq, void *dev_id) { struct dw_hdmi *hdmi = dev_id; @@ -1495,40 +1483,64 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)

static int dw_hdmi_register(struct drm_device *drm, struct dw_hdmi *hdmi) { - struct drm_encoder *encoder = &hdmi->encoder; - struct device *dev = hdmi->dev; + struct drm_encoder *encoder = hdmi->encoder; + struct drm_bridge *bridge; + int ret;

- encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node); + bridge = devm_kzalloc(drm->dev, sizeof(*bridge), GFP_KERNEL); + if (!bridge) { + DRM_ERROR("Failed to allocate drm bridge\n"); + return -ENOMEM; + }

- hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD; + hdmi->bridge = bridge; + bridge->driver_private = hdmi;

- drm_encoder_helper_add(&hdmi->encoder, &dw_hdmi_encoder_helper_funcs); - drm_encoder_init(drm, &hdmi->encoder, &dw_hdmi_encoder_funcs, - DRM_MODE_ENCODER_TMDS); + ret = drm_bridge_init(drm, bridge, &dw_hdmi_bridge_funcs); + if (ret) { + DRM_ERROR("Failed to initialize bridge with drm\n"); + return -EINVAL; + } + + encoder->bridge = bridge; + hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;

drm_connector_helper_add(&hdmi->connector, &dw_hdmi_connector_helper_funcs); drm_connector_init(drm, &hdmi->connector, &dw_hdmi_connector_funcs, DRM_MODE_CONNECTOR_HDMIA);

- hdmi->connector.encoder = &hdmi->encoder; + hdmi->connector.encoder = encoder;

- drm_mode_connector_attach_encoder(&hdmi->connector, &hdmi->encoder); + drm_mode_connector_attach_encoder(&hdmi->connector, encoder);

return 0; }

-static int dw_hdmi_bind(struct device *dev, struct device *master, void *data) +int dw_hdmi_bind(struct device *dev, struct device *master, + void *data, struct drm_encoder *encoder, + const struct dw_hdmi_plat_data *plat_data) { struct platform_device *pdev = to_platform_device(dev); - struct dw_hdmi *hdmi = platform_get_drvdata(pdev); struct drm_device *drm = data; struct device_node *np = dev->of_node; struct device_node *ddc_node; struct resource *iores; + struct dw_hdmi *hdmi; int ret, irq; u32 val = 1;

+ hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); + if (!hdmi) + return -ENOMEM; + + hdmi->plat_data = plat_data; + hdmi->dev = &pdev->dev; + hdmi->dev_type = plat_data->dev_type; + hdmi->sample_rate = 48000; + hdmi->ratio = 100; + hdmi->encoder = encoder; + of_property_read_u32(np, "reg-io-width", &val);

switch (val) { @@ -1574,8 +1586,6 @@ static int dw_hdmi_bind(struct device *dev, struct device *master, void *data) if (IS_ERR(hdmi->regs.p32)) return PTR_ERR(hdmi->regs.p32);

- if (hdmi->plat_data->setup) - hdmi->priv = hdmi->plat_data->setup(pdev); /* Product and revision IDs */ dev_info(dev, "Detected HDMI controller 0x%x:0x%x:0x%x:0x%x\n", @@ -1616,9 +1626,9 @@ static int dw_hdmi_bind(struct device *dev, struct device *master, void *data)

return 0; } +EXPORT_SYMBOL_GPL(dw_hdmi_bind);

-static void dw_hdmi_unbind(struct device *dev, struct device *master, - void *data) +void dw_hdmi_unbind(struct device *dev, struct device *master, void *data) { struct dw_hdmi *hdmi = dev_get_drvdata(dev);

@@ -1626,57 +1636,15 @@ static void dw_hdmi_unbind(struct device *dev, struct device *master, hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);

hdmi->connector.funcs->destroy(&hdmi->connector); - hdmi->encoder.funcs->destroy(&hdmi->encoder); - if (hdmi->plat_data->exit) - hdmi->plat_data->exit(hdmi->priv); - i2c_put_adapter(hdmi->ddc); -} - -static const struct component_ops hdmi_ops = { - .bind = dw_hdmi_bind, - .unbind = dw_hdmi_unbind, -}; - -static int dw_hdmi_platform_probe(struct platform_device *pdev) -{ - return component_add(&pdev->dev, &hdmi_ops); -} - -static int dw_hdmi_platform_remove(struct platform_device *pdev) -{ - component_del(&pdev->dev, &hdmi_ops); - return 0; -} - -int dw_hdmi_platform_register(struct platform_device *pdev, - const struct dw_hdmi_plat_data *plat_data) -{ - struct dw_hdmi *hdmi; - - hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); - if (!hdmi) - return -ENOMEM; - - hdmi->plat_data = plat_data; - hdmi->dev = &pdev->dev; - hdmi->dev_type = plat_data->dev_type; - hdmi->sample_rate = 48000; - hdmi->ratio = 100; + hdmi->encoder->funcs->destroy(hdmi->encoder);

- platform_set_drvdata(pdev, hdmi); - - return dw_hdmi_platform_probe(pdev); -} -EXPORT_SYMBOL_GPL(dw_hdmi_platform_register); - -int dw_hdmi_platform_unregister(struct platform_device *pdev) -{ - return dw_hdmi_platform_remove(pdev); + i2c_put_adapter(hdmi->ddc); } -EXPORT_SYMBOL_GPL(dw_hdmi_platform_unregister); +EXPORT_SYMBOL_GPL(dw_hdmi_unbind);

MODULE_AUTHOR("Sascha Hauer s.hauer@pengutronix.de"); MODULE_AUTHOR("Andy Yan andy.yan@rock-chips.com"); +MODULE_AUTHOR("Yakir Yang ykk@rock-chips.com"); MODULE_DESCRIPTION("DW HDMI transmitter driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:dw-hdmi"); diff --git a/drivers/staging/imx-drm/dw_hdmi-imx.c b/drivers/staging/imx-drm/dw_hdmi-imx.c index 4b48ea6..ad71c8e 100644 --- a/drivers/staging/imx-drm/dw_hdmi-imx.c +++ b/drivers/staging/imx-drm/dw_hdmi-imx.c @@ -8,12 +8,19 @@ */ #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 <linux/clk.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 <drm/bridge/dw_hdmi.h>

#include "imx-drm.h"

@@ -22,6 +29,7 @@ struct imx_hdmi { struct clk *isfr_clk; struct clk *iahb_clk; struct regmap *regmap; + struct drm_encoder encoder; };

static const struct mpll_config imx_mpll_cfg[] = { @@ -69,7 +77,7 @@ static const struct curr_ctrl imx_cur_ctr[] = { } };

-static int dw_hdmi_parse_dt(struct imx_hdmi *hdmi) +static int dw_hdmi_imx_parse_dt(struct imx_hdmi *hdmi) { struct device_node *np = hdmi->dev->of_node;

@@ -94,48 +102,26 @@ static int dw_hdmi_parse_dt(struct imx_hdmi *hdmi) return 0; }

-static void *dw_hdmi_imx_setup(struct platform_device *pdev) +static void dw_hdmi_imx_disable(struct drm_encoder *encoder) { - struct imx_hdmi *hdmi; - int ret; - - hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); - if (!hdmi) - return ERR_PTR(-ENOMEM); - hdmi->dev = &pdev->dev; - - ret = dw_hdmi_parse_dt(hdmi); - if (ret < 0) - return ERR_PTR(ret); - ret = clk_prepare_enable(hdmi->isfr_clk); - if (ret) { - dev_err(hdmi->dev, - "Cannot enable HDMI isfr clock: %d\n", ret); - return ERR_PTR(ret); - } - - ret = clk_prepare_enable(hdmi->iahb_clk); - if (ret) { - dev_err(hdmi->dev, - "Cannot enable HDMI iahb clock: %d\n", ret); - return ERR_PTR(ret); - } - - return hdmi; }

-static void dw_hdmi_imx_exit(void *priv) +static bool dw_hdmi_imx_mode_fixup(struct drm_encoder *encoder, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) { - struct imx_hdmi *hdmi = (struct imx_hdmi *)priv; - - clk_disable_unprepare(hdmi->isfr_clk); + return true; +}

- clk_disable_unprepare(hdmi->iahb_clk); +static void dw_hdmi_imx_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ }

-static void dw_hdmi_imx_encoder_commit(void *priv, struct drm_encoder *encoder) +static void dw_hdmi_imx_commit(struct drm_encoder *encoder) { - struct imx_hdmi *hdmi = (struct imx_hdmi *)priv; + 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, @@ -143,27 +129,30 @@ static void dw_hdmi_imx_encoder_commit(void *priv, struct drm_encoder *encoder) mux << IMX6Q_GPR3_HDMI_MUX_CTL_SHIFT); }

-static void dw_hdmi_imx_encoder_prepare(struct drm_connector *connector, - struct drm_encoder *encoder) +static void dw_hdmi_imx_prepare(struct drm_encoder *encoder) { imx_drm_panel_format(encoder, V4L2_PIX_FMT_RGB24); }

+static struct drm_encoder_helper_funcs imx_hdmi_encoder_helper_funcs = { + .mode_fixup = dw_hdmi_imx_mode_fixup, + .mode_set = dw_hdmi_imx_mode_set, + .prepare = dw_hdmi_imx_prepare, + .commit = dw_hdmi_imx_commit, + .disable = dw_hdmi_imx_disable, +}; + +static struct drm_encoder_funcs imx_hdmi_encoder_funcs = { + .destroy = drm_encoder_cleanup, +}; + static struct dw_hdmi_plat_data imx6q_hdmi_drv_data = { - .setup = dw_hdmi_imx_setup, - .exit = dw_hdmi_imx_exit, - .encoder_commit = dw_hdmi_imx_encoder_commit, - .encoder_prepare = dw_hdmi_imx_encoder_prepare, .mpll_cfg = imx_mpll_cfg, .cur_ctr = imx_cur_ctr, .dev_type = IMX6Q_HDMI, };

static struct dw_hdmi_plat_data imx6dl_hdmi_drv_data = { - .setup = dw_hdmi_imx_setup, - .exit = dw_hdmi_imx_exit, - .encoder_commit = dw_hdmi_imx_encoder_commit, - .encoder_prepare = dw_hdmi_imx_encoder_prepare, .mpll_cfg = imx_mpll_cfg, .cur_ctr = imx_cur_ctr, .dev_type = IMX6DL_HDMI, @@ -180,23 +169,82 @@ static const struct of_device_id dw_hdmi_imx_ids[] = { }; MODULE_DEVICE_TABLE(of, dw_hdmi_imx_dt_ids);

-static int dw_hdmi_imx_probe(struct platform_device *pdev) +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; + 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_ids, pdev->dev.of_node); plat_data = match->data; + hdmi->dev = &pdev->dev; + encoder = &hdmi->encoder; + platform_set_drvdata(pdev, hdmi); + + ret = dw_hdmi_imx_parse_dt(hdmi); + if (ret < 0) + return ret; + + ret = clk_prepare_enable(hdmi->isfr_clk); + if (ret) { + dev_err(dev, "Cannot enable HDMI isfr clock: %d\n", ret); + return ret; + } + + ret = clk_prepare_enable(hdmi->iahb_clk); + if (ret) { + dev_err(dev, "Cannot enable HDMI iahb clock: %d\n", ret); + return ret; + } + + encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node); + + drm_encoder_helper_add(encoder, &imx_hdmi_encoder_helper_funcs); + drm_encoder_init(drm, encoder, &imx_hdmi_encoder_funcs, + DRM_MODE_ENCODER_TMDS);

- return dw_hdmi_platform_register(pdev, plat_data); + return dw_hdmi_bind(dev, master, data, encoder, plat_data); +} + +static void dw_hdmi_imx_unbind(struct device *dev, struct device *master, + void *data) +{ + struct platform_device *pdev = to_platform_device(dev); + struct imx_hdmi *hdmi = platform_get_drvdata(pdev); + + clk_disable_unprepare(hdmi->isfr_clk); + clk_disable_unprepare(hdmi->iahb_clk); + + 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) { - return dw_hdmi_platform_unregister(pdev); + component_del(&pdev->dev, &dw_hdmi_imx_ops); + + return 0; }

static struct platform_driver dw_hdmi_imx_platform_driver = { @@ -212,6 +260,7 @@ static struct platform_driver dw_hdmi_imx_platform_driver = { 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"); diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h index 6683b63..e26e61f 100644 --- a/include/drm/bridge/dw_hdmi.h +++ b/include/drm/bridge/dw_hdmi.h @@ -38,20 +38,15 @@ struct curr_ctrl { };

struct dw_hdmi_plat_data { - void * (*setup)(struct platform_device *pdev); - void (*exit)(void *priv); - void (*encoder_commit)(void *priv, struct drm_encoder *encoder); - void (*encoder_prepare)(struct drm_connector *connector, - struct drm_encoder *encoder); enum drm_mode_status (*mode_valid)(struct drm_connector *connector, struct drm_display_mode *mode); const struct mpll_config *mpll_cfg; const struct curr_ctrl *cur_ctr; enum dw_hdmi_devtype dev_type; - };

-int dw_hdmi_platform_register(struct platform_device *pdev, - const struct dw_hdmi_plat_data *plat_data); -int dw_hdmi_platform_unregister(struct platform_device *pdev); +void dw_hdmi_unbind(struct device *dev, struct device *master, void *data); +int dw_hdmi_bind(struct device *dev, struct device *master, + void *data, struct drm_encoder *encoder, + const struct dw_hdmi_plat_data *plat_data); #endif /* __IMX_HDMI_H__ */