diff options
Diffstat (limited to 'drivers/gpu/drm/bridge')
| -rw-r--r-- | drivers/gpu/drm/bridge/analogix-anx78xx.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 30 | ||||
| -rw-r--r-- | drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 14 | ||||
| -rw-r--r-- | drivers/gpu/drm/bridge/sii902x.c | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/bridge/sii9234.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 166 | ||||
| -rw-r--r-- | drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 8 |
8 files changed, 167 insertions, 66 deletions
diff --git a/drivers/gpu/drm/bridge/analogix-anx78xx.c b/drivers/gpu/drm/bridge/analogix-anx78xx.c index 479ce3642a79..f341fb4dc7f4 100644 --- a/drivers/gpu/drm/bridge/analogix-anx78xx.c +++ b/drivers/gpu/drm/bridge/analogix-anx78xx.c @@ -21,7 +21,6 @@ #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> -#include <linux/of_gpio.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/regmap.h> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index d2de98d44184..8a57ecfc8fb4 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -13,13 +13,12 @@ #include <linux/clk.h> #include <linux/component.h> #include <linux/err.h> -#include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/module.h> #include <linux/of.h> -#include <linux/of_gpio.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> @@ -1411,8 +1410,6 @@ static void analogix_dp_bridge_mode_set(struct drm_bridge *bridge, video->color_space = COLOR_YCBCR444; else if (display_info->color_formats & DRM_COLOR_FORMAT_YCRCB422) video->color_space = COLOR_YCBCR422; - else if (display_info->color_formats & DRM_COLOR_FORMAT_RGB444) - video->color_space = COLOR_RGB; else video->color_space = COLOR_RGB; @@ -1585,12 +1582,18 @@ analogix_dp_bind(struct device *dev, struct drm_device *drm_dev, dp->force_hpd = of_property_read_bool(dev->of_node, "force-hpd"); - dp->hpd_gpio = of_get_named_gpio(dev->of_node, "hpd-gpios", 0); - if (!gpio_is_valid(dp->hpd_gpio)) - dp->hpd_gpio = of_get_named_gpio(dev->of_node, - "samsung,hpd-gpio", 0); + /* Try two different names */ + dp->hpd_gpiod = devm_gpiod_get_optional(dev, "hpd", GPIOD_IN); + if (!dp->hpd_gpiod) + dp->hpd_gpiod = devm_gpiod_get_optional(dev, "samsung,hpd", + GPIOD_IN); + if (IS_ERR(dp->hpd_gpiod)) { + dev_err(dev, "error getting HDP GPIO: %ld\n", + PTR_ERR(dp->hpd_gpiod)); + return ERR_CAST(dp->hpd_gpiod); + } - if (gpio_is_valid(dp->hpd_gpio)) { + if (dp->hpd_gpiod) { /* * Set up the hotplug GPIO from the device tree as an interrupt. * Simply specifying a different interrupt in the device tree @@ -1598,16 +1601,9 @@ analogix_dp_bind(struct device *dev, struct drm_device *drm_dev, * using a GPIO. We also need the actual GPIO specifier so * that we can get the current state of the GPIO. */ - ret = devm_gpio_request_one(&pdev->dev, dp->hpd_gpio, GPIOF_IN, - "hpd_gpio"); - if (ret) { - dev_err(&pdev->dev, "failed to get hpd gpio\n"); - return ERR_PTR(ret); - } - dp->irq = gpio_to_irq(dp->hpd_gpio); + dp->irq = gpiod_to_irq(dp->hpd_gpiod); irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING; } else { - dp->hpd_gpio = -ENODEV; dp->irq = platform_get_irq(pdev, 0); irq_flags = 0; } diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h index 3e5fe90edf71..e483f5cecd55 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h @@ -38,6 +38,8 @@ #define DPCD_VOLTAGE_SWING_SET(x) (((x) & 0x3) << 0) #define DPCD_VOLTAGE_SWING_GET(x) (((x) >> 0) & 0x3) +struct gpio_desc; + enum link_lane_count_type { LANE_COUNT1 = 1, LANE_COUNT2 = 2, @@ -171,7 +173,7 @@ struct analogix_dp_device { struct link_train link_train; struct phy *phy; int dpms_mode; - int hpd_gpio; + struct gpio_desc *hpd_gpiod; bool force_hpd; bool psr_enable; bool fast_train_enable; diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index cf17e2e21b15..b1d6c33585e7 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -12,7 +12,7 @@ #include <linux/delay.h> #include <linux/device.h> -#include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/io.h> #include <linux/iopoll.h> @@ -397,7 +397,7 @@ void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp) { u32 reg; - if (gpio_is_valid(dp->hpd_gpio)) + if (dp->hpd_gpiod) return; reg = HOTPLUG_CHG | HPD_LOST | PLUG; @@ -411,7 +411,7 @@ void analogix_dp_init_hpd(struct analogix_dp_device *dp) { u32 reg; - if (gpio_is_valid(dp->hpd_gpio)) + if (dp->hpd_gpiod) return; analogix_dp_clear_hotplug_interrupts(dp); @@ -434,8 +434,8 @@ enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp) { u32 reg; - if (gpio_is_valid(dp->hpd_gpio)) { - reg = gpio_get_value(dp->hpd_gpio); + if (dp->hpd_gpiod) { + reg = gpiod_get_value(dp->hpd_gpiod); if (reg) return DP_IRQ_TYPE_HP_CABLE_IN; else @@ -507,8 +507,8 @@ int analogix_dp_get_plug_in_status(struct analogix_dp_device *dp) { u32 reg; - if (gpio_is_valid(dp->hpd_gpio)) { - if (gpio_get_value(dp->hpd_gpio)) + if (dp->hpd_gpiod) { + if (gpiod_get_value(dp->hpd_gpiod)) return 0; } else { reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3); diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c index 961abc94d7a7..84bc2e833de8 100644 --- a/drivers/gpu/drm/bridge/sii902x.c +++ b/drivers/gpu/drm/bridge/sii902x.c @@ -599,8 +599,8 @@ static int sii902x_audio_hw_params(struct device *dev, void *data, if (ret) goto out; - for (i = 0; sii902x->audio.i2s_fifo_sequence[i] && - i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence); i++) + for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence) && + sii902x->audio.i2s_fifo_sequence[i]; i++) regmap_write(sii902x->regmap, SII902X_TPI_I2S_ENABLE_MAPPING_REG, sii902x->audio.i2s_fifo_sequence[i]); @@ -729,7 +729,7 @@ static int sii902x_audio_codec_init(struct sii902x *sii902x, .max_i2s_channels = 0, }; u8 lanes[4]; - u32 num_lanes, i; + int num_lanes, i; if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) { dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n", diff --git a/drivers/gpu/drm/bridge/sii9234.c b/drivers/gpu/drm/bridge/sii9234.c index b36bbafb0e43..25d4ad8c7ad6 100644 --- a/drivers/gpu/drm/bridge/sii9234.c +++ b/drivers/gpu/drm/bridge/sii9234.c @@ -815,7 +815,7 @@ static irqreturn_t sii9234_irq_thread(int irq, void *data) static int sii9234_init_resources(struct sii9234 *ctx, struct i2c_client *client) { - struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); + struct i2c_adapter *adapter = client->adapter; int ret; if (!ctx->dev->of_node) { @@ -897,7 +897,7 @@ static const struct drm_bridge_funcs sii9234_bridge_funcs = { static int sii9234_probe(struct i2c_client *client, const struct i2c_device_id *id) { - struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); + struct i2c_adapter *adapter = client->adapter; struct sii9234 *ctx; struct device *dev = &client->dev; int ret; diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index 66bd66bad44c..f6c89007d3bb 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -19,6 +19,7 @@ #include <linux/module.h> #include <linux/mutex.h> #include <linux/of_device.h> +#include <linux/pinctrl/consumer.h> #include <linux/regmap.h> #include <linux/dma-mapping.h> #include <linux/spinlock.h> @@ -170,6 +171,10 @@ struct dw_hdmi { bool sink_is_hdmi; bool sink_has_audio; + struct pinctrl *pinctrl; + struct pinctrl_state *default_state; + struct pinctrl_state *unwedge_state; + struct mutex mutex; /* for state below and previous_mode */ enum drm_connector_force force; /* mutex-protected force state */ bool disabled; /* DRM has disabled our bridge */ @@ -228,6 +233,13 @@ static void hdmi_mask_writeb(struct dw_hdmi *hdmi, u8 data, unsigned int reg, static void dw_hdmi_i2c_init(struct dw_hdmi *hdmi) { + hdmi_writeb(hdmi, HDMI_PHY_I2CM_INT_ADDR_DONE_POL, + HDMI_PHY_I2CM_INT_ADDR); + + hdmi_writeb(hdmi, HDMI_PHY_I2CM_CTLINT_ADDR_NAC_POL | + HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_POL, + HDMI_PHY_I2CM_CTLINT_ADDR); + /* Software reset */ hdmi_writeb(hdmi, 0x00, HDMI_I2CM_SOFTRSTZ); @@ -248,11 +260,82 @@ static void dw_hdmi_i2c_init(struct dw_hdmi *hdmi) HDMI_IH_MUTE_I2CM_STAT0); } +static bool dw_hdmi_i2c_unwedge(struct dw_hdmi *hdmi) +{ + /* If no unwedge state then give up */ + if (!hdmi->unwedge_state) + return false; + + dev_info(hdmi->dev, "Attempting to unwedge stuck i2c bus\n"); + + /* + * This is a huge hack to workaround a problem where the dw_hdmi i2c + * bus could sometimes get wedged. Once wedged there doesn't appear + * to be any way to unwedge it (including the HDMI_I2CM_SOFTRSTZ) + * other than pulsing the SDA line. + * + * We appear to be able to pulse the SDA line (in the eyes of dw_hdmi) + * by: + * 1. Remux the pin as a GPIO output, driven low. + * 2. Wait a little while. 1 ms seems to work, but we'll do 10. + * 3. Immediately jump to remux the pin as dw_hdmi i2c again. + * + * At the moment of remuxing, the line will still be low due to its + * recent stint as an output, but then it will be pulled high by the + * (presumed) external pullup. dw_hdmi seems to see this as a rising + * edge and that seems to get it out of its jam. + * + * This wedging was only ever seen on one TV, and only on one of + * its HDMI ports. It happened when the TV was powered on while the + * device was plugged in. A scope trace shows the TV bringing both SDA + * and SCL low, then bringing them both back up at roughly the same + * time. Presumably this confuses dw_hdmi because it saw activity but + * no real STOP (maybe it thinks there's another master on the bus?). + * Giving it a clean rising edge of SDA while SCL is already high + * presumably makes dw_hdmi see a STOP which seems to bring dw_hdmi out + * of its stupor. + * + * Note that after coming back alive, transfers seem to immediately + * resume, so if we unwedge due to a timeout we should wait a little + * longer for our transfer to finish, since it might have just started + * now. + */ + pinctrl_select_state(hdmi->pinctrl, hdmi->unwedge_state); + msleep(10); + pinctrl_select_state(hdmi->pinctrl, hdmi->default_state); + + return true; +} + +static int dw_hdmi_i2c_wait(struct dw_hdmi *hdmi) +{ + struct dw_hdmi_i2c *i2c = hdmi->i2c; + int stat; + + stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10); + if (!stat) { + /* If we can't unwedge, return timeout */ + if (!dw_hdmi_i2c_unwedge(hdmi)) + return -EAGAIN; + + /* We tried to unwedge; give it another chance */ + stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10); + if (!stat) + return -EAGAIN; + } + + /* Check for error condition on the bus */ + if (i2c->stat & HDMI_IH_I2CM_STAT0_ERROR) + return -EIO; + + return 0; +} + static int dw_hdmi_i2c_read(struct dw_hdmi *hdmi, unsigned char *buf, unsigned int length) { struct dw_hdmi_i2c *i2c = hdmi->i2c; - int stat; + int ret; if (!i2c->is_regaddr) { dev_dbg(hdmi->dev, "set read register address to 0\n"); @@ -271,13 +354,9 @@ static int dw_hdmi_i2c_read(struct dw_hdmi *hdmi, hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_READ, HDMI_I2CM_OPERATION); - stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10); - if (!stat) - return -EAGAIN; - - /* Check for error condition on the bus */ - if (i2c->stat & HDMI_IH_I2CM_STAT0_ERROR) - return -EIO; + ret = dw_hdmi_i2c_wait(hdmi); + if (ret) + return ret; *buf++ = hdmi_readb(hdmi, HDMI_I2CM_DATAI); } @@ -290,7 +369,7 @@ static int dw_hdmi_i2c_write(struct dw_hdmi *hdmi, unsigned char *buf, unsigned int length) { struct dw_hdmi_i2c *i2c = hdmi->i2c; - int stat; + int ret; if (!i2c->is_regaddr) { /* Use the first write byte as register address */ @@ -308,13 +387,9 @@ static int dw_hdmi_i2c_write(struct dw_hdmi *hdmi, hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_WRITE, HDMI_I2CM_OPERATION); - stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10); - if (!stat) - return -EAGAIN; - - /* Check for error condition on the bus */ - if (i2c->stat & HDMI_IH_I2CM_STAT0_ERROR) - return -EIO; + ret = dw_hdmi_i2c_wait(hdmi); + if (ret) + return ret; } return 0; @@ -1926,16 +2001,6 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode) return 0; } -static void dw_hdmi_setup_i2c(struct dw_hdmi *hdmi) -{ - hdmi_writeb(hdmi, HDMI_PHY_I2CM_INT_ADDR_DONE_POL, - HDMI_PHY_I2CM_INT_ADDR); - - hdmi_writeb(hdmi, HDMI_PHY_I2CM_CTLINT_ADDR_NAC_POL | - HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_POL, - HDMI_PHY_I2CM_CTLINT_ADDR); -} - static void initialize_hdmi_ih_mutes(struct dw_hdmi *hdmi) { u8 ih_mute; @@ -2436,6 +2501,21 @@ static const struct regmap_config hdmi_regmap_32bit_config = { .max_register = HDMI_I2CM_FS_SCL_LCNT_0_ADDR << 2, }; +static void dw_hdmi_init_hw(struct dw_hdmi *hdmi) +{ + initialize_hdmi_ih_mutes(hdmi); + + /* + * Reset HDMI DDC I2C master controller and mute I2CM interrupts. + * Even if we are using a separate i2c adapter doing this doesn't + * hurt. + */ + dw_hdmi_i2c_init(hdmi); + + if (hdmi->phy.ops->setup_hpd) + hdmi->phy.ops->setup_hpd(hdmi, hdmi->phy.data); +} + static struct dw_hdmi * __dw_hdmi_probe(struct platform_device *pdev, const struct dw_hdmi_plat_data *plat_data) @@ -2587,7 +2667,7 @@ __dw_hdmi_probe(struct platform_device *pdev, prod_id1 & HDMI_PRODUCT_ID1_HDCP ? "with" : "without", hdmi->phy.name); - initialize_hdmi_ih_mutes(hdmi); + dw_hdmi_init_hw(hdmi); irq = platform_get_irq(pdev, 0); if (irq < 0) { @@ -2615,6 +2695,24 @@ __dw_hdmi_probe(struct platform_device *pdev, /* If DDC bus is not specified, try to register HDMI I2C bus */ if (!hdmi->ddc) { + /* Look for (optional) stuff related to unwedging */ + hdmi->pinctrl = devm_pinctrl_get(dev); + if (!IS_ERR(hdmi->pinctrl)) { + hdmi->unwedge_state = + pinctrl_lookup_state(hdmi->pinctrl, "unwedge"); + hdmi->default_state = + pinctrl_lookup_state(hdmi->pinctrl, "default"); + + if (IS_ERR(hdmi->default_state) || + IS_ERR(hdmi->unwedge_state)) { + if (!IS_ERR(hdmi->unwedge_state)) + dev_warn(dev, + "Unwedge requires default pinctrl\n"); + hdmi->default_state = NULL; + hdmi->unwedge_state = NULL; + } + } + hdmi->ddc = dw_hdmi_i2c_adapter(hdmi); if (IS_ERR(hdmi->ddc)) hdmi->ddc = NULL; @@ -2626,10 +2724,6 @@ __dw_hdmi_probe(struct platform_device *pdev, hdmi->bridge.of_node = pdev->dev.of_node; #endif - dw_hdmi_setup_i2c(hdmi); - if (hdmi->phy.ops->setup_hpd) - hdmi->phy.ops->setup_hpd(hdmi, hdmi->phy.data); - memset(&pdevinfo, 0, sizeof(pdevinfo)); pdevinfo.parent = dev; pdevinfo.id = PLATFORM_DEVID_AUTO; @@ -2682,10 +2776,6 @@ __dw_hdmi_probe(struct platform_device *pdev, hdmi->cec = platform_device_register_full(&pdevinfo); } - /* Reset HDMI DDC I2C master controller and mute I2CM interrupts */ - if (hdmi->i2c) - dw_hdmi_i2c_init(hdmi); - return hdmi; err_iahb: @@ -2789,6 +2879,12 @@ void dw_hdmi_unbind(struct dw_hdmi *hdmi) } EXPORT_SYMBOL_GPL(dw_hdmi_unbind); +void dw_hdmi_resume(struct dw_hdmi *hdmi) +{ + dw_hdmi_init_hw(hdmi); +} +EXPORT_SYMBOL_GPL(dw_hdmi_resume); + 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>"); diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c index a79c87bd0147..281c58bab1a1 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c @@ -778,6 +778,10 @@ static void dw_mipi_dsi_clear_err(struct dw_mipi_dsi *dsi) static void dw_mipi_dsi_bridge_post_disable(struct drm_bridge *bridge) { struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge); + const struct dw_mipi_dsi_phy_ops *phy_ops = dsi->plat_data->phy_ops; + + if (phy_ops->power_off) + phy_ops->power_off(dsi->plat_data->priv_data); /* * Switch to command mode before panel-bridge post_disable & @@ -877,11 +881,15 @@ static void dw_mipi_dsi_bridge_mode_set(struct drm_bridge *bridge, static void dw_mipi_dsi_bridge_enable(struct drm_bridge *bridge) { struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge); + const struct dw_mipi_dsi_phy_ops *phy_ops = dsi->plat_data->phy_ops; /* Switch to video mode for panel-bridge enable & panel enable */ dw_mipi_dsi_set_mode(dsi, MIPI_DSI_MODE_VIDEO); if (dsi->slave) dw_mipi_dsi_set_mode(dsi->slave, MIPI_DSI_MODE_VIDEO); + + if (phy_ops->power_on) + phy_ops->power_on(dsi->plat_data->priv_data); } static enum drm_mode_status |