diff options
Diffstat (limited to 'drivers/gpu/drm/xlnx/zynqmp_dp.c')
| -rw-r--r-- | drivers/gpu/drm/xlnx/zynqmp_dp.c | 476 |
1 files changed, 263 insertions, 213 deletions
diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c index d14612b34796..7c9ae167eac7 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dp.c +++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c @@ -11,16 +11,12 @@ #include <drm/display/drm_dp_helper.h> #include <drm/drm_atomic_helper.h> -#include <drm/drm_connector.h> #include <drm/drm_crtc.h> #include <drm/drm_device.h> #include <drm/drm_edid.h> -#include <drm/drm_encoder.h> -#include <drm/drm_managed.h> +#include <drm/drm_fourcc.h> #include <drm/drm_modes.h> #include <drm/drm_of.h> -#include <drm/drm_probe_helper.h> -#include <drm/drm_simple_kms_helper.h> #include <linux/clk.h> #include <linux/delay.h> @@ -31,10 +27,12 @@ #include <linux/pm_runtime.h> #include <linux/phy/phy.h> #include <linux/reset.h> +#include <linux/slab.h> #include "zynqmp_disp.h" #include "zynqmp_dp.h" #include "zynqmp_dpsub.h" +#include "zynqmp_kms.h" static uint zynqmp_dp_aux_timeout_ms = 50; module_param_named(aux_timeout_ms, zynqmp_dp_aux_timeout_ms, uint, 0444); @@ -277,14 +275,13 @@ struct zynqmp_dp_config { /** * struct zynqmp_dp - Xilinx DisplayPort core - * @encoder: the drm encoder structure - * @connector: the drm connector structure * @dev: device structure * @dpsub: Display subsystem - * @drm: DRM core * @iomem: device I/O memory for register access * @reset: reset controller * @irq: irq + * @bridge: DRM bridge for the DP encoder + * @next_bridge: The downstream bridge * @config: IP core configuration from DTS * @aux: aux channel * @phy: PHY handles for DP lanes @@ -298,15 +295,15 @@ struct zynqmp_dp_config { * @train_set: set of training data */ struct zynqmp_dp { - struct drm_encoder encoder; - struct drm_connector connector; struct device *dev; struct zynqmp_dpsub *dpsub; - struct drm_device *drm; void __iomem *iomem; struct reset_control *reset; int irq; + struct drm_bridge bridge; + struct drm_bridge *next_bridge; + struct zynqmp_dp_config config; struct drm_dp_aux aux; struct phy *phy[ZYNQMP_DP_MAX_LANES]; @@ -321,14 +318,9 @@ struct zynqmp_dp { u8 train_set[ZYNQMP_DP_MAX_LANES]; }; -static inline struct zynqmp_dp *encoder_to_dp(struct drm_encoder *encoder) -{ - return container_of(encoder, struct zynqmp_dp, encoder); -} - -static inline struct zynqmp_dp *connector_to_dp(struct drm_connector *connector) +static inline struct zynqmp_dp *bridge_to_dp(struct drm_bridge *bridge) { - return container_of(connector, struct zynqmp_dp, connector); + return container_of(bridge, struct zynqmp_dp, bridge); } static void zynqmp_dp_write(struct zynqmp_dp *dp, int offset, u32 val) @@ -1064,7 +1056,7 @@ static int zynqmp_dp_aux_init(struct zynqmp_dp *dp) dp->aux.name = "ZynqMP DP AUX"; dp->aux.dev = dp->dev; - dp->aux.drm_dev = dp->drm; + dp->aux.drm_dev = dp->bridge.dev; dp->aux.transfer = zynqmp_dp_aux_transfer; return drm_dp_aux_register(&dp->aux); @@ -1101,6 +1093,7 @@ static void zynqmp_dp_update_misc(struct zynqmp_dp *dp) /** * zynqmp_dp_set_format - Set the input format * @dp: DisplayPort IP core structure + * @info: Display info * @format: input format * @bpc: bits per component * @@ -1109,10 +1102,10 @@ static void zynqmp_dp_update_misc(struct zynqmp_dp *dp) * Return: 0 on success, or -EINVAL. */ static int zynqmp_dp_set_format(struct zynqmp_dp *dp, + const struct drm_display_info *info, enum zynqmp_dpsub_format format, unsigned int bpc) { - static const struct drm_display_info *display; struct zynqmp_dp_config *config = &dp->config; unsigned int num_colors; @@ -1145,12 +1138,11 @@ static int zynqmp_dp_set_format(struct zynqmp_dp *dp, return -EINVAL; } - display = &dp->connector.display_info; - if (display->bpc && bpc > display->bpc) { + if (info && info->bpc && bpc > info->bpc) { dev_warn(dp->dev, "downgrading requested %ubpc to display limit %ubpc\n", - bpc, display->bpc); - bpc = display->bpc; + bpc, info->bpc); + bpc = info->bpc; } config->misc0 &= ~ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_MASK; @@ -1195,7 +1187,7 @@ static int zynqmp_dp_set_format(struct zynqmp_dp *dp, */ static void zynqmp_dp_encoder_mode_set_transfer_unit(struct zynqmp_dp *dp, - struct drm_display_mode *mode) + const struct drm_display_mode *mode) { u32 tu = ZYNQMP_DP_MSA_TRANSFER_UNIT_SIZE_TU_SIZE_DEF; u32 bw, vid_kbytes, avg_bytes_per_tu, init_wait; @@ -1255,12 +1247,12 @@ static void zynqmp_dp_encoder_mode_set_stream(struct zynqmp_dp *dp, zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_VSTART, mode->vtotal - mode->vsync_start); - /* In synchronous mode, set the diviers */ + /* In synchronous mode, set the dividers */ if (dp->config.misc0 & ZYNQMP_DP_MAIN_STREAM_MISC0_SYNC_LOCK) { reg = drm_dp_bw_code_to_link_rate(dp->mode.bw_code); zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_N_VID, reg); zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_M_VID, mode->clock); - rate = zynqmp_disp_get_audio_clk_rate(dp->dpsub->disp); + rate = zynqmp_dpsub_get_audio_clk_rate(dp->dpsub); if (rate) { dev_dbg(dp->dev, "Audio rate: %d\n", rate / 512); zynqmp_dp_write(dp, ZYNQMP_DP_TX_N_AUD, reg); @@ -1269,7 +1261,7 @@ static void zynqmp_dp_encoder_mode_set_stream(struct zynqmp_dp *dp, } /* Only 2 channel audio is supported now */ - if (zynqmp_disp_audio_enabled(dp->dpsub->disp)) + if (zynqmp_dpsub_audio_enabled(dp->dpsub)) zynqmp_dp_write(dp, ZYNQMP_DP_TX_AUDIO_CHANNELS, 1); zynqmp_dp_write(dp, ZYNQMP_DP_USER_PIX_WIDTH, 1); @@ -1281,97 +1273,114 @@ static void zynqmp_dp_encoder_mode_set_stream(struct zynqmp_dp *dp, } /* ----------------------------------------------------------------------------- - * DRM Connector + * DISP Configuration */ -static enum drm_connector_status -zynqmp_dp_connector_detect(struct drm_connector *connector, bool force) +static void zynqmp_dp_disp_enable(struct zynqmp_dp *dp, + struct drm_bridge_state *old_bridge_state) { - struct zynqmp_dp *dp = connector_to_dp(connector); - struct zynqmp_dp_link_config *link_config = &dp->link_config; - u32 state, i; - int ret; + enum zynqmp_dpsub_layer_id layer_id; + struct zynqmp_disp_layer *layer; + const struct drm_format_info *info; + + if (dp->dpsub->connected_ports & BIT(ZYNQMP_DPSUB_PORT_LIVE_VIDEO)) + layer_id = ZYNQMP_DPSUB_LAYER_VID; + else if (dp->dpsub->connected_ports & BIT(ZYNQMP_DPSUB_PORT_LIVE_GFX)) + layer_id = ZYNQMP_DPSUB_LAYER_GFX; + else + return; - /* - * This is from heuristic. It takes some delay (ex, 100 ~ 500 msec) to - * get the HPD signal with some monitors. - */ - for (i = 0; i < 10; i++) { - state = zynqmp_dp_read(dp, ZYNQMP_DP_INTERRUPT_SIGNAL_STATE); - if (state & ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_HPD) - break; - msleep(100); - } + layer = dp->dpsub->layers[layer_id]; - if (state & ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_HPD) { - ret = drm_dp_dpcd_read(&dp->aux, 0x0, dp->dpcd, - sizeof(dp->dpcd)); - if (ret < 0) { - dev_dbg(dp->dev, "DPCD read failed"); - goto disconnected; - } + /* TODO: Make the format configurable. */ + info = drm_format_info(DRM_FORMAT_YUV422); + zynqmp_disp_layer_set_format(layer, info); + zynqmp_disp_layer_enable(layer, ZYNQMP_DPSUB_LAYER_LIVE); - link_config->max_rate = min_t(int, - drm_dp_max_link_rate(dp->dpcd), - DP_HIGH_BIT_RATE2); - link_config->max_lanes = min_t(u8, - drm_dp_max_lane_count(dp->dpcd), - dp->num_lanes); + if (layer_id == ZYNQMP_DPSUB_LAYER_GFX) + zynqmp_disp_blend_set_global_alpha(dp->dpsub->disp, true, 255); + else + zynqmp_disp_blend_set_global_alpha(dp->dpsub->disp, false, 0); - dp->status = connector_status_connected; - return connector_status_connected; - } + zynqmp_disp_enable(dp->dpsub->disp); +} -disconnected: - dp->status = connector_status_disconnected; - return connector_status_disconnected; +static void zynqmp_dp_disp_disable(struct zynqmp_dp *dp, + struct drm_bridge_state *old_bridge_state) +{ + struct zynqmp_disp_layer *layer; + + if (dp->dpsub->connected_ports & BIT(ZYNQMP_DPSUB_PORT_LIVE_VIDEO)) + layer = dp->dpsub->layers[ZYNQMP_DPSUB_LAYER_VID]; + else if (dp->dpsub->connected_ports & BIT(ZYNQMP_DPSUB_PORT_LIVE_GFX)) + layer = dp->dpsub->layers[ZYNQMP_DPSUB_LAYER_GFX]; + else + return; + + zynqmp_disp_disable(dp->dpsub->disp); + zynqmp_disp_layer_disable(layer); } -static int zynqmp_dp_connector_get_modes(struct drm_connector *connector) +/* ----------------------------------------------------------------------------- + * DRM Bridge + */ + +static int zynqmp_dp_bridge_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) { - struct zynqmp_dp *dp = connector_to_dp(connector); - struct edid *edid; + struct zynqmp_dp *dp = bridge_to_dp(bridge); int ret; - edid = drm_get_edid(connector, &dp->aux.ddc); - if (!edid) - return 0; + /* Initialize and register the AUX adapter. */ + ret = zynqmp_dp_aux_init(dp); + if (ret) { + dev_err(dp->dev, "failed to initialize DP aux\n"); + return ret; + } - drm_connector_update_edid_property(connector, edid); - ret = drm_add_edid_modes(connector, edid); - kfree(edid); + if (dp->next_bridge) { + ret = drm_bridge_attach(bridge->encoder, dp->next_bridge, + bridge, flags); + if (ret < 0) + goto error; + } + /* Now that initialisation is complete, enable interrupts. */ + zynqmp_dp_write(dp, ZYNQMP_DP_INT_EN, ZYNQMP_DP_INT_ALL); + + return 0; + +error: + zynqmp_dp_aux_cleanup(dp); return ret; } -static struct drm_encoder * -zynqmp_dp_connector_best_encoder(struct drm_connector *connector) +static void zynqmp_dp_bridge_detach(struct drm_bridge *bridge) { - struct zynqmp_dp *dp = connector_to_dp(connector); + struct zynqmp_dp *dp = bridge_to_dp(bridge); - return &dp->encoder; + zynqmp_dp_aux_cleanup(dp); } -static int zynqmp_dp_connector_mode_valid(struct drm_connector *connector, - struct drm_display_mode *mode) +static int zynqmp_dp_bridge_mode_valid(struct drm_bridge *bridge, + const struct drm_display_info *info, + const struct drm_display_mode *mode) { - struct zynqmp_dp *dp = connector_to_dp(connector); - u8 max_lanes = dp->link_config.max_lanes; - u8 bpp = dp->config.bpp; - int max_rate = dp->link_config.max_rate; + struct zynqmp_dp *dp = bridge_to_dp(bridge); int rate; if (mode->clock > ZYNQMP_MAX_FREQ) { - dev_dbg(dp->dev, "filtered the mode, %s,for high pixel rate\n", + dev_dbg(dp->dev, "filtered mode %s for high pixel rate\n", mode->name); drm_mode_debug_printmodeline(mode); return MODE_CLOCK_HIGH; } /* Check with link rate and lane count */ - rate = zynqmp_dp_max_rate(max_rate, max_lanes, bpp); + rate = zynqmp_dp_max_rate(dp->link_config.max_rate, + dp->link_config.max_lanes, dp->config.bpp); if (mode->clock > rate) { - dev_dbg(dp->dev, "filtered the mode, %s,for high pixel rate\n", + dev_dbg(dp->dev, "filtered mode %s for high pixel rate\n", mode->name); drm_mode_debug_printmodeline(mode); return MODE_CLOCK_HIGH; @@ -1380,36 +1389,62 @@ static int zynqmp_dp_connector_mode_valid(struct drm_connector *connector, return MODE_OK; } -static const struct drm_connector_funcs zynqmp_dp_connector_funcs = { - .detect = zynqmp_dp_connector_detect, - .fill_modes = drm_helper_probe_single_connector_modes, - .destroy = drm_connector_cleanup, - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, - .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, - .reset = drm_atomic_helper_connector_reset, -}; - -static const struct drm_connector_helper_funcs -zynqmp_dp_connector_helper_funcs = { - .get_modes = zynqmp_dp_connector_get_modes, - .best_encoder = zynqmp_dp_connector_best_encoder, - .mode_valid = zynqmp_dp_connector_mode_valid, -}; - -/* ----------------------------------------------------------------------------- - * DRM Encoder - */ - -static void zynqmp_dp_encoder_enable(struct drm_encoder *encoder) +static void zynqmp_dp_bridge_atomic_enable(struct drm_bridge *bridge, + struct drm_bridge_state *old_bridge_state) { - struct zynqmp_dp *dp = encoder_to_dp(encoder); + struct zynqmp_dp *dp = bridge_to_dp(bridge); + struct drm_atomic_state *state = old_bridge_state->base.state; + const struct drm_crtc_state *crtc_state; + const struct drm_display_mode *adjusted_mode; + const struct drm_display_mode *mode; + struct drm_connector *connector; + struct drm_crtc *crtc; unsigned int i; - int ret = 0; + int rate; + int ret; pm_runtime_get_sync(dp->dev); + + zynqmp_dp_disp_enable(dp, old_bridge_state); + + /* + * Retrieve the CRTC mode and adjusted mode. This requires a little + * dance to go from the bridge to the encoder, to the connector and to + * the CRTC. + */ + connector = drm_atomic_get_new_connector_for_encoder(state, + bridge->encoder); + crtc = drm_atomic_get_new_connector_state(state, connector)->crtc; + crtc_state = drm_atomic_get_new_crtc_state(state, crtc); + adjusted_mode = &crtc_state->adjusted_mode; + mode = &crtc_state->mode; + + zynqmp_dp_set_format(dp, &connector->display_info, + ZYNQMP_DPSUB_FORMAT_RGB, 8); + + /* Check again as bpp or format might have been changed */ + rate = zynqmp_dp_max_rate(dp->link_config.max_rate, + dp->link_config.max_lanes, dp->config.bpp); + if (mode->clock > rate) { + dev_err(dp->dev, "mode %s has too high pixel rate\n", + mode->name); + drm_mode_debug_printmodeline(mode); + } + + /* Configure the mode */ + ret = zynqmp_dp_mode_configure(dp, adjusted_mode->clock, 0); + if (ret < 0) { + pm_runtime_put_sync(dp->dev); + return; + } + + zynqmp_dp_encoder_mode_set_transfer_unit(dp, adjusted_mode); + zynqmp_dp_encoder_mode_set_stream(dp, adjusted_mode); + + /* Enable the encoder */ dp->enabled = true; zynqmp_dp_update_misc(dp); - if (zynqmp_disp_audio_enabled(dp->dpsub->disp)) + if (zynqmp_dpsub_audio_enabled(dp->dpsub)) zynqmp_dp_write(dp, ZYNQMP_DP_TX_AUDIO_CONTROL, 1); zynqmp_dp_write(dp, ZYNQMP_DP_TX_PHY_POWER_DOWN, 0); if (dp->status == connector_status_connected) { @@ -1432,9 +1467,10 @@ static void zynqmp_dp_encoder_enable(struct drm_encoder *encoder) zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_ENABLE, 1); } -static void zynqmp_dp_encoder_disable(struct drm_encoder *encoder) +static void zynqmp_dp_bridge_atomic_disable(struct drm_bridge *bridge, + struct drm_bridge_state *old_bridge_state) { - struct zynqmp_dp *dp = encoder_to_dp(encoder); + struct zynqmp_dp *dp = bridge_to_dp(bridge); dp->enabled = false; cancel_delayed_work(&dp->hpd_work); @@ -1442,49 +1478,22 @@ static void zynqmp_dp_encoder_disable(struct drm_encoder *encoder) drm_dp_dpcd_writeb(&dp->aux, DP_SET_POWER, DP_SET_POWER_D3); zynqmp_dp_write(dp, ZYNQMP_DP_TX_PHY_POWER_DOWN, ZYNQMP_DP_TX_PHY_POWER_DOWN_ALL); - if (zynqmp_disp_audio_enabled(dp->dpsub->disp)) + if (zynqmp_dpsub_audio_enabled(dp->dpsub)) zynqmp_dp_write(dp, ZYNQMP_DP_TX_AUDIO_CONTROL, 0); - pm_runtime_put_sync(dp->dev); -} - -static void -zynqmp_dp_encoder_atomic_mode_set(struct drm_encoder *encoder, - struct drm_crtc_state *crtc_state, - struct drm_connector_state *connector_state) -{ - struct zynqmp_dp *dp = encoder_to_dp(encoder); - struct drm_display_mode *mode = &crtc_state->mode; - struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode; - u8 max_lanes = dp->link_config.max_lanes; - u8 bpp = dp->config.bpp; - int rate, max_rate = dp->link_config.max_rate; - int ret; - zynqmp_dp_set_format(dp, ZYNQMP_DPSUB_FORMAT_RGB, 8); + zynqmp_dp_disp_disable(dp, old_bridge_state); - /* Check again as bpp or format might have been chagned */ - rate = zynqmp_dp_max_rate(max_rate, max_lanes, bpp); - if (mode->clock > rate) { - dev_err(dp->dev, "the mode, %s,has too high pixel rate\n", - mode->name); - drm_mode_debug_printmodeline(mode); - } - - ret = zynqmp_dp_mode_configure(dp, adjusted_mode->clock, 0); - if (ret < 0) - return; - - zynqmp_dp_encoder_mode_set_transfer_unit(dp, adjusted_mode); - zynqmp_dp_encoder_mode_set_stream(dp, adjusted_mode); + pm_runtime_put_sync(dp->dev); } #define ZYNQMP_DP_MIN_H_BACKPORCH 20 -static int -zynqmp_dp_encoder_atomic_check(struct drm_encoder *encoder, - struct drm_crtc_state *crtc_state, - struct drm_connector_state *conn_state) +static int zynqmp_dp_bridge_atomic_check(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) { + struct zynqmp_dp *dp = bridge_to_dp(bridge); struct drm_display_mode *mode = &crtc_state->mode; struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode; int diff = mode->htotal - mode->hsync_end; @@ -1497,7 +1506,7 @@ zynqmp_dp_encoder_atomic_check(struct drm_encoder *encoder, int vrefresh = (adjusted_mode->clock * 1000) / (adjusted_mode->vtotal * adjusted_mode->htotal); - dev_dbg(encoder->dev->dev, "hbackporch adjusted: %d to %d", + dev_dbg(dp->dev, "hbackporch adjusted: %d to %d", diff, ZYNQMP_DP_MIN_H_BACKPORCH - diff); diff = ZYNQMP_DP_MIN_H_BACKPORCH - diff; adjusted_mode->htotal += diff; @@ -1508,11 +1517,68 @@ zynqmp_dp_encoder_atomic_check(struct drm_encoder *encoder, return 0; } -static const struct drm_encoder_helper_funcs zynqmp_dp_encoder_helper_funcs = { - .enable = zynqmp_dp_encoder_enable, - .disable = zynqmp_dp_encoder_disable, - .atomic_mode_set = zynqmp_dp_encoder_atomic_mode_set, - .atomic_check = zynqmp_dp_encoder_atomic_check, +static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge *bridge) +{ + struct zynqmp_dp *dp = bridge_to_dp(bridge); + struct zynqmp_dp_link_config *link_config = &dp->link_config; + u32 state, i; + int ret; + + /* + * This is from heuristic. It takes some delay (ex, 100 ~ 500 msec) to + * get the HPD signal with some monitors. + */ + for (i = 0; i < 10; i++) { + state = zynqmp_dp_read(dp, ZYNQMP_DP_INTERRUPT_SIGNAL_STATE); + if (state & ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_HPD) + break; + msleep(100); + } + + if (state & ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_HPD) { + ret = drm_dp_dpcd_read(&dp->aux, 0x0, dp->dpcd, + sizeof(dp->dpcd)); + if (ret < 0) { + dev_dbg(dp->dev, "DPCD read failed"); + goto disconnected; + } + + link_config->max_rate = min_t(int, + drm_dp_max_link_rate(dp->dpcd), + DP_HIGH_BIT_RATE2); + link_config->max_lanes = min_t(u8, + drm_dp_max_lane_count(dp->dpcd), + dp->num_lanes); + + dp->status = connector_status_connected; + return connector_status_connected; + } + +disconnected: + dp->status = connector_status_disconnected; + return connector_status_disconnected; +} + +static struct edid *zynqmp_dp_bridge_get_edid(struct drm_bridge *bridge, + struct drm_connector *connector) +{ + struct zynqmp_dp *dp = bridge_to_dp(bridge); + + return drm_get_edid(connector, &dp->aux.ddc); +} + +static const struct drm_bridge_funcs zynqmp_dp_bridge_funcs = { + .attach = zynqmp_dp_bridge_attach, + .detach = zynqmp_dp_bridge_detach, + .mode_valid = zynqmp_dp_bridge_mode_valid, + .atomic_enable = zynqmp_dp_bridge_atomic_enable, + .atomic_disable = zynqmp_dp_bridge_atomic_disable, + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, + .atomic_reset = drm_atomic_helper_bridge_reset, + .atomic_check = zynqmp_dp_bridge_atomic_check, + .detect = zynqmp_dp_bridge_detect, + .get_edid = zynqmp_dp_bridge_get_edid, }; /* ----------------------------------------------------------------------------- @@ -1543,12 +1609,12 @@ void zynqmp_dp_disable_vblank(struct zynqmp_dp *dp) static void zynqmp_dp_hpd_work_func(struct work_struct *work) { - struct zynqmp_dp *dp; - - dp = container_of(work, struct zynqmp_dp, hpd_work.work); + struct zynqmp_dp *dp = container_of(work, struct zynqmp_dp, + hpd_work.work); + enum drm_connector_status status; - if (dp->drm) - drm_helper_hpd_irq_event(dp->drm); + status = zynqmp_dp_bridge_detect(&dp->bridge); + drm_bridge_hpd_notify(&dp->bridge, status); } static irqreturn_t zynqmp_dp_irq_handler(int irq, void *data) @@ -1570,7 +1636,7 @@ static irqreturn_t zynqmp_dp_irq_handler(int irq, void *data) zynqmp_dp_write(dp, ZYNQMP_DP_INT_STATUS, status); if (status & ZYNQMP_DP_INT_VBLANK_START) - zynqmp_disp_handle_vblank(dp->dpsub->disp); + zynqmp_dpsub_drm_handle_vblank(dp->dpsub); if (status & ZYNQMP_DP_INT_HPD_EVENT) schedule_delayed_work(&dp->hpd_work, 0); @@ -1599,94 +1665,76 @@ handled: * Initialization & Cleanup */ -int zynqmp_dp_drm_init(struct zynqmp_dpsub *dpsub) -{ - struct zynqmp_dp *dp = dpsub->dp; - struct drm_encoder *encoder = &dp->encoder; - struct drm_connector *connector = &dp->connector; - int ret; - - dp->config.misc0 &= ~ZYNQMP_DP_MAIN_STREAM_MISC0_SYNC_LOCK; - zynqmp_dp_set_format(dp, ZYNQMP_DPSUB_FORMAT_RGB, 8); - - /* Create the DRM encoder and connector. */ - encoder->possible_crtcs |= zynqmp_disp_get_crtc_mask(dpsub->disp); - drm_simple_encoder_init(dp->drm, encoder, DRM_MODE_ENCODER_TMDS); - drm_encoder_helper_add(encoder, &zynqmp_dp_encoder_helper_funcs); - - connector->polled = DRM_CONNECTOR_POLL_HPD; - ret = drm_connector_init(encoder->dev, connector, - &zynqmp_dp_connector_funcs, - DRM_MODE_CONNECTOR_DisplayPort); - if (ret) { - dev_err(dp->dev, "failed to create the DRM connector\n"); - return ret; - } - - drm_connector_helper_add(connector, &zynqmp_dp_connector_helper_funcs); - drm_connector_register(connector); - drm_connector_attach_encoder(connector, encoder); - - /* Initialize and register the AUX adapter. */ - ret = zynqmp_dp_aux_init(dp); - if (ret) { - dev_err(dp->dev, "failed to initialize DP aux\n"); - return ret; - } - - /* Now that initialisation is complete, enable interrupts. */ - zynqmp_dp_write(dp, ZYNQMP_DP_INT_EN, ZYNQMP_DP_INT_ALL); - - return 0; -} - -int zynqmp_dp_probe(struct zynqmp_dpsub *dpsub, struct drm_device *drm) +int zynqmp_dp_probe(struct zynqmp_dpsub *dpsub) { struct platform_device *pdev = to_platform_device(dpsub->dev); + struct drm_bridge *bridge; struct zynqmp_dp *dp; struct resource *res; int ret; - dp = drmm_kzalloc(drm, sizeof(*dp), GFP_KERNEL); + dp = kzalloc(sizeof(*dp), GFP_KERNEL); if (!dp) return -ENOMEM; dp->dev = &pdev->dev; dp->dpsub = dpsub; dp->status = connector_status_disconnected; - dp->drm = drm; INIT_DELAYED_WORK(&dp->hpd_work, zynqmp_dp_hpd_work_func); - dpsub->dp = dp; - /* Acquire all resources (IOMEM, IRQ and PHYs). */ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dp"); dp->iomem = devm_ioremap_resource(dp->dev, res); - if (IS_ERR(dp->iomem)) - return PTR_ERR(dp->iomem); + if (IS_ERR(dp->iomem)) { + ret = PTR_ERR(dp->iomem); + goto err_free; + } dp->irq = platform_get_irq(pdev, 0); - if (dp->irq < 0) - return dp->irq; + if (dp->irq < 0) { + ret = dp->irq; + goto err_free; + } dp->reset = devm_reset_control_get(dp->dev, NULL); if (IS_ERR(dp->reset)) { if (PTR_ERR(dp->reset) != -EPROBE_DEFER) dev_err(dp->dev, "failed to get reset: %ld\n", PTR_ERR(dp->reset)); - return PTR_ERR(dp->reset); + ret = PTR_ERR(dp->reset); + goto err_free; } ret = zynqmp_dp_reset(dp, false); if (ret < 0) - return ret; + goto err_free; ret = zynqmp_dp_phy_probe(dp); if (ret) goto err_reset; + /* Initialize the bridge. */ + bridge = &dp->bridge; + bridge->funcs = &zynqmp_dp_bridge_funcs; + bridge->ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID + | DRM_BRIDGE_OP_HPD; + bridge->type = DRM_MODE_CONNECTOR_DisplayPort; + dpsub->bridge = bridge; + + /* + * Acquire the next bridge in the chain. Ignore errors caused by port@5 + * not being connected for backward-compatibility with older DTs. + */ + ret = drm_of_find_panel_or_bridge(dp->dev->of_node, 5, 0, NULL, + &dp->next_bridge); + if (ret < 0 && ret != -ENODEV) + goto err_reset; + /* Initialize the hardware. */ + dp->config.misc0 &= ~ZYNQMP_DP_MAIN_STREAM_MISC0_SYNC_LOCK; + zynqmp_dp_set_format(dp, NULL, ZYNQMP_DPSUB_FORMAT_RGB, 8); + zynqmp_dp_write(dp, ZYNQMP_DP_TX_PHY_POWER_DOWN, ZYNQMP_DP_TX_PHY_POWER_DOWN_ALL); zynqmp_dp_set(dp, ZYNQMP_DP_PHY_RESET, ZYNQMP_DP_PHY_RESET_ALL_RESET); @@ -1710,6 +1758,8 @@ int zynqmp_dp_probe(struct zynqmp_dpsub *dpsub, struct drm_device *drm) if (ret < 0) goto err_phy_exit; + dpsub->dp = dp; + dev_dbg(dp->dev, "ZynqMP DisplayPort Tx probed with %u lanes\n", dp->num_lanes); @@ -1719,7 +1769,8 @@ err_phy_exit: zynqmp_dp_phy_exit(dp); err_reset: zynqmp_dp_reset(dp, true); - +err_free: + kfree(dp); return ret; } @@ -1731,7 +1782,6 @@ void zynqmp_dp_remove(struct zynqmp_dpsub *dpsub) disable_irq(dp->irq); cancel_delayed_work_sync(&dp->hpd_work); - zynqmp_dp_aux_cleanup(dp); zynqmp_dp_write(dp, ZYNQMP_DP_TRANSMITTER_ENABLE, 0); zynqmp_dp_write(dp, ZYNQMP_DP_INT_DS, 0xffffffff); |