The enable signal may not be controllable by the kernel. Make it optional.

Signed-off-by: Laurent Pinchart laurent.pinchart+renesas@ideasonboard.com Reviewed-by: Jagan Teki jagan@amarulasolutions.com Reviewed-by: Stephen Boyd swboyd@chromium.org Reviewed-by: Douglas Anderson dianders@chromium.org --- drivers/gpu/drm/bridge/ti-sn65dsi86.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index 5d712c8c3c3b..f0c7c6d4b2c1 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -1459,7 +1459,8 @@ static int ti_sn65dsi86_probe(struct i2c_client *client, return dev_err_probe(dev, PTR_ERR(pdata->regmap), "regmap i2c init failed\n");

- pdata->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW); + pdata->enable_gpio = devm_gpiod_get_optional(dev, "enable", + GPIOD_OUT_LOW); if (IS_ERR(pdata->enable_gpio)) return dev_err_probe(dev, PTR_ERR(pdata->enable_gpio), "failed to get enable gpio from DT\n");

To simplify interfacing with the panel, wrap it in a panel-bridge and let the DRM bridge helpers handle chaining of operations.

This also prepares for support of DRM_BRIDGE_ATTACH_NO_CONNECTOR, which requires all components in the display pipeline to be represented by bridges.

Signed-off-by: Laurent Pinchart laurent.pinchart+renesas@ideasonboard.com Reviewed-by: Jagan Teki jagan@amarulasolutions.com --- Changes since v1:

- Drop error message when drm_bridge_attach() fails (now printed by the function) - Return ERR_PTR() directly - Clarify which bridge is the next bridge - Drop ti_sn65dsi86.panel field --- drivers/gpu/drm/bridge/ti-sn65dsi86.c | 32 +++++++++++++++++---------- 1 file changed, 20 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index 28c1ea370ae4..18b4420cc6b3 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -127,7 +127,7 @@ * @host_node: Remote DSI node. * @dsi: Our MIPI DSI source. * @refclk: Our reference clock. - * @panel: Our panel. + * @next_bridge: The bridge on the eDP side. * @enable_gpio: The GPIO we toggle to enable the bridge. * @supplies: Data for bulk enabling/disabling our regulators. * @dp_lanes: Count of dp_lanes we're using. @@ -159,7 +159,7 @@ struct ti_sn65dsi86 { struct device_node *host_node; struct mipi_dsi_device *dsi; struct clk *refclk; - struct drm_panel *panel; + struct drm_bridge *next_bridge; struct gpio_desc *enable_gpio; struct regulator_bulk_data supplies[SN_REGULATOR_SUPPLY_NUM]; int dp_lanes; @@ -404,7 +404,8 @@ connector_to_ti_sn65dsi86(struct drm_connector *connector) static int ti_sn_bridge_connector_get_modes(struct drm_connector *connector) { struct ti_sn65dsi86 *pdata = connector_to_ti_sn65dsi86(connector); - return drm_panel_get_modes(pdata->panel, connector); + + return drm_bridge_get_modes(pdata->next_bridge, connector); }

static enum drm_mode_status @@ -530,8 +531,16 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge, } pdata->dsi = dsi;

+ /* Attach the next bridge */ + ret = drm_bridge_attach(bridge->encoder, pdata->next_bridge, + &pdata->bridge, flags); + if (ret < 0) + goto err_dsi_detach; + return 0;

+err_dsi_detach: + mipi_dsi_detach(dsi); err_dsi_attach: mipi_dsi_device_unregister(dsi); err_dsi_host: @@ -550,8 +559,6 @@ static void ti_sn_bridge_disable(struct drm_bridge *bridge) { struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);

- drm_panel_disable(pdata->panel); - /* disable video stream */ regmap_update_bits(pdata->regmap, SN_ENH_FRAME_REG, VSTREAM_ENABLE, 0); /* semi auto link training mode OFF */ @@ -878,8 +885,6 @@ static void ti_sn_bridge_enable(struct drm_bridge *bridge) /* enable video stream */ regmap_update_bits(pdata->regmap, SN_ENH_FRAME_REG, VSTREAM_ENABLE, VSTREAM_ENABLE); - - drm_panel_enable(pdata->panel); }

static void ti_sn_bridge_pre_enable(struct drm_bridge *bridge) @@ -890,16 +895,12 @@ static void ti_sn_bridge_pre_enable(struct drm_bridge *bridge)

if (!pdata->refclk) ti_sn65dsi86_enable_comms(pdata); - - drm_panel_prepare(pdata->panel); }

static void ti_sn_bridge_post_disable(struct drm_bridge *bridge) { struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);

- drm_panel_unprepare(pdata->panel); - if (!pdata->refclk) ti_sn65dsi86_disable_comms(pdata);

@@ -1304,13 +1305,20 @@ static int ti_sn_bridge_probe(struct auxiliary_device *adev, { struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent); struct device_node *np = pdata->dev->of_node; + struct drm_panel *panel; int ret;

- ret = drm_of_find_panel_or_bridge(np, 1, 0, &pdata->panel, NULL); + ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL); if (ret) return dev_err_probe(&adev->dev, ret, "could not find any panel node\n");

+ pdata->next_bridge = devm_drm_panel_bridge_add(pdata->dev, panel); + if (IS_ERR(pdata->next_bridge)) { + DRM_ERROR("failed to create panel bridge\n"); + return PTR_ERR(pdata->next_bridge); + } + ti_sn_bridge_parse_lanes(pdata, np);

ret = ti_sn_bridge_parse_dsi_host(pdata);

Reorganize the functions in sections, related to connector operations, bridge operations, AUX adapter, GPIO controller and probe & remove.

This prepares for proper support of DRM_BRIDGE_ATTACH_NO_CONNECTOR that will add more functions, to ensure that the code will stay readable.

No functional change intended.

Signed-off-by: Laurent Pinchart laurent.pinchart+renesas@ideasonboard.com Reviewed-by: Stephen Boyd swboyd@chromium.org Reviewed-by: Douglas Anderson dianders@chromium.org --- drivers/gpu/drm/bridge/ti-sn65dsi86.c | 629 +++++++++++++------------- 1 file changed, 326 insertions(+), 303 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index 18b4420cc6b3..feeda88c4ef0 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -394,7 +394,211 @@ static void ti_sn65dsi86_debugfs_init(struct ti_sn65dsi86 *pdata) debugfs_create_file("status", 0600, debugfs, pdata, &status_fops); }

-/* Connector funcs */ +/* ----------------------------------------------------------------------------- + * Auxiliary Devices (*not* AUX) + */ + +static void ti_sn65dsi86_uninit_aux(void *data) +{ + auxiliary_device_uninit(data); +} + +static void ti_sn65dsi86_delete_aux(void *data) +{ + auxiliary_device_delete(data); +} + +/* + * AUX bus docs say that a non-NULL release is mandatory, but it makes no + * sense for the model used here where all of the aux devices are allocated + * in the single shared structure. We'll use this noop as a workaround. + */ +static void ti_sn65dsi86_noop(struct device *dev) {} + +static int ti_sn65dsi86_add_aux_device(struct ti_sn65dsi86 *pdata, + struct auxiliary_device *aux, + const char *name) +{ + struct device *dev = pdata->dev; + int ret; + + aux->name = name; + aux->dev.parent = dev; + aux->dev.release = ti_sn65dsi86_noop; + device_set_of_node_from_dev(&aux->dev, dev); + ret = auxiliary_device_init(aux); + if (ret) + return ret; + ret = devm_add_action_or_reset(dev, ti_sn65dsi86_uninit_aux, aux); + if (ret) + return ret; + + ret = auxiliary_device_add(aux); + if (ret) + return ret; + ret = devm_add_action_or_reset(dev, ti_sn65dsi86_delete_aux, aux); + + return ret; +} + +/* ----------------------------------------------------------------------------- + * AUX Adapter + */ + +static struct ti_sn65dsi86 *aux_to_ti_sn65dsi86(struct drm_dp_aux *aux) +{ + return container_of(aux, struct ti_sn65dsi86, aux); +} + +static ssize_t ti_sn_aux_transfer(struct drm_dp_aux *aux, + struct drm_dp_aux_msg *msg) +{ + struct ti_sn65dsi86 *pdata = aux_to_ti_sn65dsi86(aux); + u32 request = msg->request & ~(DP_AUX_I2C_MOT | DP_AUX_I2C_WRITE_STATUS_UPDATE); + u32 request_val = AUX_CMD_REQ(msg->request); + u8 *buf = msg->buffer; + unsigned int len = msg->size; + unsigned int val; + int ret; + u8 addr_len[SN_AUX_LENGTH_REG + 1 - SN_AUX_ADDR_19_16_REG]; + + if (len > SN_AUX_MAX_PAYLOAD_BYTES) + return -EINVAL; + + pm_runtime_get_sync(pdata->dev); + mutex_lock(&pdata->comms_mutex); + + /* + * If someone tries to do a DDC over AUX transaction before pre_enable() + * on a device without a dedicated reference clock then we just can't + * do it. Fail right away. This prevents non-refclk users from reading + * the EDID before enabling the panel but such is life. + */ + if (!pdata->comms_enabled) { + ret = -EIO; + goto exit; + } + + switch (request) { + case DP_AUX_NATIVE_WRITE: + case DP_AUX_I2C_WRITE: + case DP_AUX_NATIVE_READ: + case DP_AUX_I2C_READ: + regmap_write(pdata->regmap, SN_AUX_CMD_REG, request_val); + /* Assume it's good */ + msg->reply = 0; + break; + default: + ret = -EINVAL; + goto exit; + } + + BUILD_BUG_ON(sizeof(addr_len) != sizeof(__be32)); + put_unaligned_be32((msg->address & SN_AUX_ADDR_MASK) << 8 | len, + addr_len); + regmap_bulk_write(pdata->regmap, SN_AUX_ADDR_19_16_REG, addr_len, + ARRAY_SIZE(addr_len)); + + if (request == DP_AUX_NATIVE_WRITE || request == DP_AUX_I2C_WRITE) + regmap_bulk_write(pdata->regmap, SN_AUX_WDATA_REG(0), buf, len); + + /* Clear old status bits before start so we don't get confused */ + regmap_write(pdata->regmap, SN_AUX_CMD_STATUS_REG, + AUX_IRQ_STATUS_NAT_I2C_FAIL | + AUX_IRQ_STATUS_AUX_RPLY_TOUT | + AUX_IRQ_STATUS_AUX_SHORT); + + regmap_write(pdata->regmap, SN_AUX_CMD_REG, request_val | AUX_CMD_SEND); + + /* Zero delay loop because i2c transactions are slow already */ + ret = regmap_read_poll_timeout(pdata->regmap, SN_AUX_CMD_REG, val, + !(val & AUX_CMD_SEND), 0, 50 * 1000); + if (ret) + goto exit; + + ret = regmap_read(pdata->regmap, SN_AUX_CMD_STATUS_REG, &val); + if (ret) + goto exit; + + if (val & AUX_IRQ_STATUS_AUX_RPLY_TOUT) { + /* + * The hardware tried the message seven times per the DP spec + * but it hit a timeout. We ignore defers here because they're + * handled in hardware. + */ + ret = -ETIMEDOUT; + goto exit; + } + + if (val & AUX_IRQ_STATUS_AUX_SHORT) { + ret = regmap_read(pdata->regmap, SN_AUX_LENGTH_REG, &len); + if (ret) + goto exit; + } else if (val & AUX_IRQ_STATUS_NAT_I2C_FAIL) { + switch (request) { + case DP_AUX_I2C_WRITE: + case DP_AUX_I2C_READ: + msg->reply |= DP_AUX_I2C_REPLY_NACK; + break; + case DP_AUX_NATIVE_READ: + case DP_AUX_NATIVE_WRITE: + msg->reply |= DP_AUX_NATIVE_REPLY_NACK; + break; + } + len = 0; + goto exit; + } + + if (request != DP_AUX_NATIVE_WRITE && request != DP_AUX_I2C_WRITE && len != 0) + ret = regmap_bulk_read(pdata->regmap, SN_AUX_RDATA_REG(0), buf, len); + +exit: + mutex_unlock(&pdata->comms_mutex); + pm_runtime_mark_last_busy(pdata->dev); + pm_runtime_put_autosuspend(pdata->dev); + + if (ret) + return ret; + return len; +} + +static int ti_sn_aux_probe(struct auxiliary_device *adev, + const struct auxiliary_device_id *id) +{ + struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent); + int ret; + + pdata->aux.name = "ti-sn65dsi86-aux"; + pdata->aux.dev = &adev->dev; + pdata->aux.transfer = ti_sn_aux_transfer; + drm_dp_aux_init(&pdata->aux); + + ret = devm_of_dp_aux_populate_ep_devices(&pdata->aux); + if (ret) + return ret; + + /* + * The eDP to MIPI bridge parts don't work until the AUX channel is + * setup so we don't add it in the main driver probe, we add it now. + */ + return ti_sn65dsi86_add_aux_device(pdata, &pdata->bridge_aux, "bridge"); +} + +static const struct auxiliary_device_id ti_sn_aux_id_table[] = { + { .name = "ti_sn65dsi86.aux", }, + {}, +}; + +static struct auxiliary_driver ti_sn_aux_driver = { + .name = "aux", + .probe = ti_sn_aux_probe, + .id_table = ti_sn_aux_id_table, +}; + +/* ----------------------------------------------------------------------------- + * DRM Connector Operations + */ + static struct ti_sn65dsi86 * connector_to_ti_sn65dsi86(struct drm_connector *connector) { @@ -432,25 +636,15 @@ static const struct drm_connector_funcs ti_sn_bridge_connector_funcs = { .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, };

+/*------------------------------------------------------------------------------ + * DRM Bridge + */ + static struct ti_sn65dsi86 *bridge_to_ti_sn65dsi86(struct drm_bridge *bridge) { return container_of(bridge, struct ti_sn65dsi86, bridge); }

-static int ti_sn65dsi86_parse_regulators(struct ti_sn65dsi86 *pdata) -{ - unsigned int i; - const char * const ti_sn_bridge_supply_names[] = { - "vcca", "vcc", "vccio", "vpll", - }; - - for (i = 0; i < SN_REGULATOR_SUPPLY_NUM; i++) - pdata->supplies[i].supply = ti_sn_bridge_supply_names[i]; - - return devm_regulator_bulk_get(pdata->dev, SN_REGULATOR_SUPPLY_NUM, - pdata->supplies); -} - static int ti_sn_bridge_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags) { @@ -916,121 +1110,53 @@ static const struct drm_bridge_funcs ti_sn_bridge_funcs = { .post_disable = ti_sn_bridge_post_disable, };

-static struct ti_sn65dsi86 *aux_to_ti_sn65dsi86(struct drm_dp_aux *aux) +static void ti_sn_bridge_parse_lanes(struct ti_sn65dsi86 *pdata, + struct device_node *np) { - return container_of(aux, struct ti_sn65dsi86, aux); -} - -static ssize_t ti_sn_aux_transfer(struct drm_dp_aux *aux, - struct drm_dp_aux_msg *msg) -{ - struct ti_sn65dsi86 *pdata = aux_to_ti_sn65dsi86(aux); - u32 request = msg->request & ~(DP_AUX_I2C_MOT | DP_AUX_I2C_WRITE_STATUS_UPDATE); - u32 request_val = AUX_CMD_REQ(msg->request); - u8 *buf = msg->buffer; - unsigned int len = msg->size; - unsigned int val; - int ret; - u8 addr_len[SN_AUX_LENGTH_REG + 1 - SN_AUX_ADDR_19_16_REG]; - - if (len > SN_AUX_MAX_PAYLOAD_BYTES) - return -EINVAL; - - pm_runtime_get_sync(pdata->dev); - mutex_lock(&pdata->comms_mutex); + u32 lane_assignments[SN_MAX_DP_LANES] = { 0, 1, 2, 3 }; + u32 lane_polarities[SN_MAX_DP_LANES] = { }; + struct device_node *endpoint; + u8 ln_assign = 0; + u8 ln_polrs = 0; + int dp_lanes; + int i;

/* - * If someone tries to do a DDC over AUX transaction before pre_enable() - * on a device without a dedicated reference clock then we just can't - * do it. Fail right away. This prevents non-refclk users from reading - * the EDID before enabling the panel but such is life. + * Read config from the device tree about lane remapping and lane + * polarities. These are optional and we assume identity map and + * normal polarity if nothing is specified. It's OK to specify just + * data-lanes but not lane-polarities but not vice versa. + * + * Error checking is light (we just make sure we don't crash or + * buffer overrun) and we assume dts is well formed and specifying + * mappings that the hardware supports. */ - if (!pdata->comms_enabled) { - ret = -EIO; - goto exit; - } - - switch (request) { - case DP_AUX_NATIVE_WRITE: - case DP_AUX_I2C_WRITE: - case DP_AUX_NATIVE_READ: - case DP_AUX_I2C_READ: - regmap_write(pdata->regmap, SN_AUX_CMD_REG, request_val); - /* Assume it's good */ - msg->reply = 0; - break; - default: - ret = -EINVAL; - goto exit; - } - - BUILD_BUG_ON(sizeof(addr_len) != sizeof(__be32)); - put_unaligned_be32((msg->address & SN_AUX_ADDR_MASK) << 8 | len, - addr_len); - regmap_bulk_write(pdata->regmap, SN_AUX_ADDR_19_16_REG, addr_len, - ARRAY_SIZE(addr_len)); - - if (request == DP_AUX_NATIVE_WRITE || request == DP_AUX_I2C_WRITE) - regmap_bulk_write(pdata->regmap, SN_AUX_WDATA_REG(0), buf, len); - - /* Clear old status bits before start so we don't get confused */ - regmap_write(pdata->regmap, SN_AUX_CMD_STATUS_REG, - AUX_IRQ_STATUS_NAT_I2C_FAIL | - AUX_IRQ_STATUS_AUX_RPLY_TOUT | - AUX_IRQ_STATUS_AUX_SHORT); - - regmap_write(pdata->regmap, SN_AUX_CMD_REG, request_val | AUX_CMD_SEND); - - /* Zero delay loop because i2c transactions are slow already */ - ret = regmap_read_poll_timeout(pdata->regmap, SN_AUX_CMD_REG, val, - !(val & AUX_CMD_SEND), 0, 50 * 1000); - if (ret) - goto exit; - - ret = regmap_read(pdata->regmap, SN_AUX_CMD_STATUS_REG, &val); - if (ret) - goto exit; - - if (val & AUX_IRQ_STATUS_AUX_RPLY_TOUT) { - /* - * The hardware tried the message seven times per the DP spec - * but it hit a timeout. We ignore defers here because they're - * handled in hardware. - */ - ret = -ETIMEDOUT; - goto exit; + endpoint = of_graph_get_endpoint_by_regs(np, 1, -1); + dp_lanes = of_property_count_u32_elems(endpoint, "data-lanes"); + if (dp_lanes > 0 && dp_lanes <= SN_MAX_DP_LANES) { + of_property_read_u32_array(endpoint, "data-lanes", + lane_assignments, dp_lanes); + of_property_read_u32_array(endpoint, "lane-polarities", + lane_polarities, dp_lanes); + } else { + dp_lanes = SN_MAX_DP_LANES; } + of_node_put(endpoint);

- if (val & AUX_IRQ_STATUS_AUX_SHORT) { - ret = regmap_read(pdata->regmap, SN_AUX_LENGTH_REG, &len); - if (ret) - goto exit; - } else if (val & AUX_IRQ_STATUS_NAT_I2C_FAIL) { - switch (request) { - case DP_AUX_I2C_WRITE: - case DP_AUX_I2C_READ: - msg->reply |= DP_AUX_I2C_REPLY_NACK; - break; - case DP_AUX_NATIVE_READ: - case DP_AUX_NATIVE_WRITE: - msg->reply |= DP_AUX_NATIVE_REPLY_NACK; - break; - } - len = 0; - goto exit; + /* + * Convert into register format. Loop over all lanes even if + * data-lanes had fewer elements so that we nicely initialize + * the LN_ASSIGN register. + */ + for (i = SN_MAX_DP_LANES - 1; i >= 0; i--) { + ln_assign = ln_assign << LN_ASSIGN_WIDTH | lane_assignments[i]; + ln_polrs = ln_polrs << 1 | lane_polarities[i]; }

- if (request != DP_AUX_NATIVE_WRITE && request != DP_AUX_I2C_WRITE && len != 0) - ret = regmap_bulk_read(pdata->regmap, SN_AUX_RDATA_REG(0), buf, len); - -exit: - mutex_unlock(&pdata->comms_mutex); - pm_runtime_mark_last_busy(pdata->dev); - pm_runtime_put_autosuspend(pdata->dev); - - if (ret) - return ret; - return len; + /* Stash in our struct for when we power on */ + pdata->dp_lanes = dp_lanes; + pdata->ln_assign = ln_assign; + pdata->ln_polrs = ln_polrs; }

static int ti_sn_bridge_parse_dsi_host(struct ti_sn65dsi86 *pdata) @@ -1047,6 +1173,72 @@ static int ti_sn_bridge_parse_dsi_host(struct ti_sn65dsi86 *pdata) return 0; }

+static int ti_sn_bridge_probe(struct auxiliary_device *adev, + const struct auxiliary_device_id *id) +{ + struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent); + struct device_node *np = pdata->dev->of_node; + struct drm_panel *panel; + int ret; + + ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL); + if (ret) + return dev_err_probe(&adev->dev, ret, + "could not find any panel node\n"); + + pdata->next_bridge = devm_drm_panel_bridge_add(pdata->dev, panel); + if (IS_ERR(pdata->next_bridge)) { + DRM_ERROR("failed to create panel bridge\n"); + return PTR_ERR(pdata->next_bridge); + } + + ti_sn_bridge_parse_lanes(pdata, np); + + ret = ti_sn_bridge_parse_dsi_host(pdata); + if (ret) + return ret; + + pdata->bridge.funcs = &ti_sn_bridge_funcs; + pdata->bridge.of_node = np; + + drm_bridge_add(&pdata->bridge); + + return 0; +} + +static void ti_sn_bridge_remove(struct auxiliary_device *adev) +{ + struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent); + + if (!pdata) + return; + + if (pdata->dsi) { + mipi_dsi_detach(pdata->dsi); + mipi_dsi_device_unregister(pdata->dsi); + } + + drm_bridge_remove(&pdata->bridge); + + of_node_put(pdata->host_node); +} + +static const struct auxiliary_device_id ti_sn_bridge_id_table[] = { + { .name = "ti_sn65dsi86.bridge", }, + {}, +}; + +static struct auxiliary_driver ti_sn_bridge_driver = { + .name = "bridge", + .probe = ti_sn_bridge_probe, + .remove = ti_sn_bridge_remove, + .id_table = ti_sn_bridge_id_table, +}; + +/* ----------------------------------------------------------------------------- + * GPIO Controller + */ + #if defined(CONFIG_OF_GPIO)

static int tn_sn_bridge_of_xlate(struct gpio_chip *chip, @@ -1251,198 +1443,29 @@ static inline void ti_sn_gpio_unregister(void) {}

#endif

-static void ti_sn_bridge_parse_lanes(struct ti_sn65dsi86 *pdata, - struct device_node *np) -{ - u32 lane_assignments[SN_MAX_DP_LANES] = { 0, 1, 2, 3 }; - u32 lane_polarities[SN_MAX_DP_LANES] = { }; - struct device_node *endpoint; - u8 ln_assign = 0; - u8 ln_polrs = 0; - int dp_lanes; - int i; - - /* - * Read config from the device tree about lane remapping and lane - * polarities. These are optional and we assume identity map and - * normal polarity if nothing is specified. It's OK to specify just - * data-lanes but not lane-polarities but not vice versa. - * - * Error checking is light (we just make sure we don't crash or - * buffer overrun) and we assume dts is well formed and specifying - * mappings that the hardware supports. - */ - endpoint = of_graph_get_endpoint_by_regs(np, 1, -1); - dp_lanes = of_property_count_u32_elems(endpoint, "data-lanes"); - if (dp_lanes > 0 && dp_lanes <= SN_MAX_DP_LANES) { - of_property_read_u32_array(endpoint, "data-lanes", - lane_assignments, dp_lanes); - of_property_read_u32_array(endpoint, "lane-polarities", - lane_polarities, dp_lanes); - } else { - dp_lanes = SN_MAX_DP_LANES; - } - of_node_put(endpoint); - - /* - * Convert into register format. Loop over all lanes even if - * data-lanes had fewer elements so that we nicely initialize - * the LN_ASSIGN register. - */ - for (i = SN_MAX_DP_LANES - 1; i >= 0; i--) { - ln_assign = ln_assign << LN_ASSIGN_WIDTH | lane_assignments[i]; - ln_polrs = ln_polrs << 1 | lane_polarities[i]; - } - - /* Stash in our struct for when we power on */ - pdata->dp_lanes = dp_lanes; - pdata->ln_assign = ln_assign; - pdata->ln_polrs = ln_polrs; -} - -static int ti_sn_bridge_probe(struct auxiliary_device *adev, - const struct auxiliary_device_id *id) -{ - struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent); - struct device_node *np = pdata->dev->of_node; - struct drm_panel *panel; - int ret; - - ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL); - if (ret) - return dev_err_probe(&adev->dev, ret, - "could not find any panel node\n"); - - pdata->next_bridge = devm_drm_panel_bridge_add(pdata->dev, panel); - if (IS_ERR(pdata->next_bridge)) { - DRM_ERROR("failed to create panel bridge\n"); - return PTR_ERR(pdata->next_bridge); - } - - ti_sn_bridge_parse_lanes(pdata, np); - - ret = ti_sn_bridge_parse_dsi_host(pdata); - if (ret) - return ret; - - pdata->bridge.funcs = &ti_sn_bridge_funcs; - pdata->bridge.of_node = np; - - drm_bridge_add(&pdata->bridge); - - return 0; -} - -static void ti_sn_bridge_remove(struct auxiliary_device *adev) -{ - struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent); - - if (!pdata) - return; - - if (pdata->dsi) { - mipi_dsi_detach(pdata->dsi); - mipi_dsi_device_unregister(pdata->dsi); - } - - drm_bridge_remove(&pdata->bridge); - - of_node_put(pdata->host_node); -} - -static const struct auxiliary_device_id ti_sn_bridge_id_table[] = { - { .name = "ti_sn65dsi86.bridge", }, - {}, -}; - -static struct auxiliary_driver ti_sn_bridge_driver = { - .name = "bridge", - .probe = ti_sn_bridge_probe, - .remove = ti_sn_bridge_remove, - .id_table = ti_sn_bridge_id_table, -}; +/* ----------------------------------------------------------------------------- + * Probe & Remove + */

static void ti_sn65dsi86_runtime_disable(void *data) { pm_runtime_disable(data); }

-static void ti_sn65dsi86_uninit_aux(void *data) +static int ti_sn65dsi86_parse_regulators(struct ti_sn65dsi86 *pdata) { - auxiliary_device_uninit(data); -} - -static void ti_sn65dsi86_delete_aux(void *data) -{ - auxiliary_device_delete(data); -} - -/* - * AUX bus docs say that a non-NULL release is mandatory, but it makes no - * sense for the model used here where all of the aux devices are allocated - * in the single shared structure. We'll use this noop as a workaround. - */ -static void ti_sn65dsi86_noop(struct device *dev) {} - -static int ti_sn65dsi86_add_aux_device(struct ti_sn65dsi86 *pdata, - struct auxiliary_device *aux, - const char *name) -{ - struct device *dev = pdata->dev; - int ret; - - aux->name = name; - aux->dev.parent = dev; - aux->dev.release = ti_sn65dsi86_noop; - device_set_of_node_from_dev(&aux->dev, dev); - ret = auxiliary_device_init(aux); - if (ret) - return ret; - ret = devm_add_action_or_reset(dev, ti_sn65dsi86_uninit_aux, aux); - if (ret) - return ret; + unsigned int i; + const char * const ti_sn_bridge_supply_names[] = { + "vcca", "vcc", "vccio", "vpll", + };

- ret = auxiliary_device_add(aux); - if (ret) - return ret; - ret = devm_add_action_or_reset(dev, ti_sn65dsi86_delete_aux, aux); + for (i = 0; i < SN_REGULATOR_SUPPLY_NUM; i++) + pdata->supplies[i].supply = ti_sn_bridge_supply_names[i];

- return ret; + return devm_regulator_bulk_get(pdata->dev, SN_REGULATOR_SUPPLY_NUM, + pdata->supplies); }

-static int ti_sn_aux_probe(struct auxiliary_device *adev, - const struct auxiliary_device_id *id) -{ - struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent); - int ret; - - pdata->aux.name = "ti-sn65dsi86-aux"; - pdata->aux.dev = &adev->dev; - pdata->aux.transfer = ti_sn_aux_transfer; - drm_dp_aux_init(&pdata->aux); - - ret = devm_of_dp_aux_populate_ep_devices(&pdata->aux); - if (ret) - return ret; - - /* - * The eDP to MIPI bridge parts don't work until the AUX channel is - * setup so we don't add it in the main driver probe, we add it now. - */ - return ti_sn65dsi86_add_aux_device(pdata, &pdata->bridge_aux, "bridge"); -} - -static const struct auxiliary_device_id ti_sn_aux_id_table[] = { - { .name = "ti_sn65dsi86.aux", }, - {}, -}; - -static struct auxiliary_driver ti_sn_aux_driver = { - .name = "aux", - .probe = ti_sn_aux_probe, - .id_table = ti_sn_aux_id_table, -}; - static int ti_sn65dsi86_probe(struct i2c_client *client, const struct i2c_device_id *id) {