diff options
Diffstat (limited to 'drivers/gpu/drm/bridge/ite-it6505.c')
| -rw-r--r-- | drivers/gpu/drm/bridge/ite-it6505.c | 133 |
1 files changed, 106 insertions, 27 deletions
diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c index 21a9b8422bda..bc451b2a77c2 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -26,7 +26,6 @@ #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_crtc.h> -#include <drm/drm_crtc_helper.h> #include <drm/drm_edid.h> #include <drm/drm_print.h> #include <drm/drm_probe_helper.h> @@ -412,7 +411,6 @@ struct it6505 { * Mutex protects extcon and interrupt functions from interfering * each other. */ - struct mutex irq_lock; struct mutex extcon_lock; struct mutex mode_lock; /* used to bridge_detect */ struct mutex aux_lock; /* used to aux data transfers */ @@ -438,6 +436,8 @@ struct it6505 { bool powered; bool hpd_state; u32 afe_setting; + u32 max_dpi_pixel_clock; + u32 max_lane_count; enum hdcp_state hdcp_status; struct delayed_work hdcp_work; struct work_struct hdcp_wait_ksv_list; @@ -457,6 +457,8 @@ struct it6505 { /* it6505 driver hold option */ bool enable_drv_hold; + + struct edid *cached_edid; }; struct it6505_step_train_para { @@ -1463,7 +1465,8 @@ static void it6505_parse_link_capabilities(struct it6505 *it6505) it6505->lane_count = link->num_lanes; DRM_DEV_DEBUG_DRIVER(dev, "Sink support %d lanes training", it6505->lane_count); - it6505->lane_count = min_t(int, it6505->lane_count, MAX_LANE_COUNT); + it6505->lane_count = min_t(int, it6505->lane_count, + it6505->max_lane_count); it6505->branch_device = drm_dp_is_branch(it6505->dpcd); DRM_DEV_DEBUG_DRIVER(dev, "Sink %sbranch device", @@ -2244,6 +2247,12 @@ static void it6505_plugged_status_to_codec(struct it6505 *it6505) status == connector_status_connected); } +static void it6505_remove_edid(struct it6505 *it6505) +{ + kfree(it6505->cached_edid); + it6505->cached_edid = NULL; +} + static int it6505_process_hpd_irq(struct it6505 *it6505) { struct device *dev = &it6505->client->dev; @@ -2270,6 +2279,7 @@ static int it6505_process_hpd_irq(struct it6505 *it6505) it6505_reset_logic(it6505); it6505_int_mask_enable(it6505); it6505_init(it6505); + it6505_remove_edid(it6505); return 0; } @@ -2353,6 +2363,7 @@ static void it6505_irq_hpd(struct it6505 *it6505) it6505_video_reset(it6505); } else { memset(it6505->dpcd, 0, sizeof(it6505->dpcd)); + it6505_remove_edid(it6505); if (it6505->hdcp_desired) it6505_stop_hdcp(it6505); @@ -2494,10 +2505,8 @@ static irqreturn_t it6505_int_threaded_handler(int unused, void *data) }; int int_status[3], i; - mutex_lock(&it6505->irq_lock); - - if (it6505->enable_drv_hold || !it6505->powered) - goto unlock; + if (it6505->enable_drv_hold || pm_runtime_get_if_in_use(dev) <= 0) + return IRQ_HANDLED; int_status[0] = it6505_read(it6505, INT_STATUS_01); int_status[1] = it6505_read(it6505, INT_STATUS_02); @@ -2515,16 +2524,14 @@ static irqreturn_t it6505_int_threaded_handler(int unused, void *data) if (it6505_test_bit(irq_vec[0].bit, (unsigned int *)int_status)) irq_vec[0].handler(it6505); - if (!it6505->hpd_state) - goto unlock; - - for (i = 1; i < ARRAY_SIZE(irq_vec); i++) { - if (it6505_test_bit(irq_vec[i].bit, (unsigned int *)int_status)) - irq_vec[i].handler(it6505); + if (it6505->hpd_state) { + for (i = 1; i < ARRAY_SIZE(irq_vec); i++) { + if (it6505_test_bit(irq_vec[i].bit, (unsigned int *)int_status)) + irq_vec[i].handler(it6505); + } } -unlock: - mutex_unlock(&it6505->irq_lock); + pm_runtime_put_sync(dev); return IRQ_HANDLED; } @@ -2902,7 +2909,7 @@ it6505_bridge_mode_valid(struct drm_bridge *bridge, if (mode->flags & DRM_MODE_FLAG_INTERLACE) return MODE_NO_INTERLACE; - if (mode->clock > DPI_PIXEL_CLK_MAX) + if (mode->clock > it6505->max_dpi_pixel_clock) return MODE_CLOCK_HIGH; it6505->video_info.clock = mode->clock; @@ -3016,16 +3023,18 @@ static struct edid *it6505_bridge_get_edid(struct drm_bridge *bridge, { struct it6505 *it6505 = bridge_to_it6505(bridge); struct device *dev = &it6505->client->dev; - struct edid *edid; - edid = drm_do_get_edid(connector, it6505_get_edid_block, it6505); + if (!it6505->cached_edid) { + it6505->cached_edid = drm_do_get_edid(connector, it6505_get_edid_block, + it6505); - if (!edid) { - DRM_DEV_DEBUG_DRIVER(dev, "failed to get edid!"); - return NULL; + if (!it6505->cached_edid) { + DRM_DEV_DEBUG_DRIVER(dev, "failed to get edid!"); + return NULL; + } } - return edid; + return drm_edid_duplicate(it6505->cached_edid); } static const struct drm_bridge_funcs it6505_bridge_funcs = { @@ -3089,10 +3098,32 @@ static int it6505_init_pdata(struct it6505 *it6505) return 0; } +static int it6505_get_data_lanes_count(const struct device_node *endpoint, + const unsigned int min, + const unsigned int max) +{ + int ret; + + ret = of_property_count_u32_elems(endpoint, "data-lanes"); + if (ret < 0) + return ret; + + if (ret < min || ret > max) + return -EINVAL; + + return ret; +} + static void it6505_parse_dt(struct it6505 *it6505) { struct device *dev = &it6505->client->dev; + struct device_node *np = dev->of_node, *ep = NULL; + int len; + u64 link_frequencies; + u32 data_lanes[4]; u32 *afe_setting = &it6505->afe_setting; + u32 *max_lane_count = &it6505->max_lane_count; + u32 *max_dpi_pixel_clock = &it6505->max_dpi_pixel_clock; it6505->lane_swap_disabled = device_property_read_bool(dev, "no-laneswap"); @@ -3108,7 +3139,56 @@ static void it6505_parse_dt(struct it6505 *it6505) } else { *afe_setting = 0; } - DRM_DEV_DEBUG_DRIVER(dev, "using afe_setting: %d", *afe_setting); + + ep = of_graph_get_endpoint_by_regs(np, 1, 0); + of_node_put(ep); + + if (ep) { + len = it6505_get_data_lanes_count(ep, 1, 4); + + if (len > 0 && len != 3) { + of_property_read_u32_array(ep, "data-lanes", + data_lanes, len); + *max_lane_count = len; + } else { + *max_lane_count = MAX_LANE_COUNT; + dev_err(dev, "error data-lanes, use default"); + } + } else { + *max_lane_count = MAX_LANE_COUNT; + dev_err(dev, "error endpoint, use default"); + } + + ep = of_graph_get_endpoint_by_regs(np, 0, 0); + of_node_put(ep); + + if (ep) { + len = of_property_read_variable_u64_array(ep, + "link-frequencies", + &link_frequencies, 0, + 1); + if (len >= 0) { + do_div(link_frequencies, 1000); + if (link_frequencies > 297000) { + dev_err(dev, + "max pixel clock error, use default"); + *max_dpi_pixel_clock = DPI_PIXEL_CLK_MAX; + } else { + *max_dpi_pixel_clock = link_frequencies; + } + } else { + dev_err(dev, "error link frequencies, use default"); + *max_dpi_pixel_clock = DPI_PIXEL_CLK_MAX; + } + } else { + dev_err(dev, "error endpoint, use default"); + *max_dpi_pixel_clock = DPI_PIXEL_CLK_MAX; + } + + DRM_DEV_DEBUG_DRIVER(dev, "using afe_setting: %u, max_lane_count: %u", + it6505->afe_setting, it6505->max_lane_count); + DRM_DEV_DEBUG_DRIVER(dev, "using max_dpi_pixel_clock: %u kHz", + it6505->max_dpi_pixel_clock); } static ssize_t receive_timing_debugfs_show(struct file *file, char __user *buf, @@ -3265,8 +3345,7 @@ static void it6505_shutdown(struct i2c_client *client) it6505_lane_off(it6505); } -static int it6505_i2c_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int it6505_i2c_probe(struct i2c_client *client) { struct it6505 *it6505; struct device *dev = &client->dev; @@ -3277,7 +3356,6 @@ static int it6505_i2c_probe(struct i2c_client *client, if (!it6505) return -ENOMEM; - mutex_init(&it6505->irq_lock); mutex_init(&it6505->extcon_lock); mutex_init(&it6505->mode_lock); mutex_init(&it6505->aux_lock); @@ -3367,6 +3445,7 @@ static void it6505_i2c_remove(struct i2c_client *client) drm_dp_aux_unregister(&it6505->aux); it6505_debugfs_remove(it6505); it6505_poweroff(it6505); + it6505_remove_edid(it6505); } static const struct i2c_device_id it6505_id[] = { @@ -3387,7 +3466,7 @@ static struct i2c_driver it6505_i2c_driver = { .of_match_table = it6505_of_match, .pm = &it6505_bridge_pm_ops, }, - .probe = it6505_i2c_probe, + .probe_new = it6505_i2c_probe, .remove = it6505_i2c_remove, .shutdown = it6505_shutdown, .id_table = it6505_id, |