/* * Copyright © 2013 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Author: Jani Nikula */ #include #include #include #include #include #include #include #include #include "i915_drv.h" #include "intel_drv.h" #include "intel_dsi.h" /* return pixels in terms of txbyteclkhs */ static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count, u16 burst_mode_ratio) { return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp * burst_mode_ratio, 8 * 100), lane_count); } /* return pixels equvalent to txbyteclkhs */ static u16 pixels_from_txbyteclkhs(u16 clk_hs, int bpp, int lane_count, u16 burst_mode_ratio) { return DIV_ROUND_UP((clk_hs * lane_count * 8 * 100), (bpp * burst_mode_ratio)); } enum mipi_dsi_pixel_format pixel_format_from_register_bits(u32 fmt) { /* It just so happens the VBT matches register contents. */ switch (fmt) { case VID_MODE_FORMAT_RGB888: return MIPI_DSI_FMT_RGB888; case VID_MODE_FORMAT_RGB666: return MIPI_DSI_FMT_RGB666; case VID_MODE_FORMAT_RGB666_PACKED: return MIPI_DSI_FMT_RGB666_PACKED; case VID_MODE_FORMAT_RGB565: return MIPI_DSI_FMT_RGB565; default: MISSING_CASE(fmt); return MIPI_DSI_FMT_RGB666; } } void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi, enum port port) { struct drm_encoder *encoder = &intel_dsi->base.base; struct drm_device *dev = encoder->dev; struct drm_i915_private *dev_priv = to_i915(dev); u32 mask; mask = LP_CTRL_FIFO_EMPTY | HS_CTRL_FIFO_EMPTY | LP_DATA_FIFO_EMPTY | HS_DATA_FIFO_EMPTY; if (intel_wait_for_register(dev_priv, MIPI_GEN_FIFO_STAT(port), mask, mask, 100)) DRM_ERROR("DPI FIFOs are not empty\n"); } static void write_data(struct drm_i915_private *dev_priv, i915_reg_t reg, const u8 *data, u32 len) { u32 i, j; for (i = 0; i < len; i += 4) { u32 val = 0; for (j = 0; j < min_t(u32, len - i, 4); j++) val |= *data++ << 8 * j; I915_WRITE(reg, val); } } static void read_data(struct drm_i915_private *dev_priv, i915_reg_t reg, u8 *data, u32 len) { u32 i, j; for (i = 0; i < len; i += 4) { u32 val = I915_READ(reg); for (j = 0; j < min_t(u32, len - i, 4); j++) *data++ = val >> 8 * j; } } static ssize_t intel_dsi_host_transfer(struct mipi_dsi_host *host, const struct mipi_dsi_msg *msg) { struct intel_dsi_host *intel_dsi_host = to_intel_dsi_host(host); struct drm_device *dev = intel_dsi_host->intel_dsi->base.base.dev; struct drm_i915_private *dev_priv = to_i915(dev); enum port port = intel_dsi_host->port; struct mipi_dsi_packet packet; ssize_t ret; const u8 *header, *data; i915_reg_t data_reg, ctrl_reg; u32 data_mask, ctrl_mask; ret = mipi_dsi_create_packet(&packet, msg); if (ret < 0) return ret; header = packet.header; data = packet.payload; if (msg->flags & MIPI_DSI_MSG_USE_LPM) { data_reg = MIPI_LP_GEN_DATA(port); data_mask = LP_DATA_FIFO_FULL; ctrl_reg = MIPI_LP_GEN_CTRL(port); ctrl_mask = LP_CTRL_FIFO_FULL; } else { data_reg = MIPI_HS_GEN_DATA(port); data_mask = HS_DATA_FIFO_FULL; ctrl_reg = MIPI_HS_GEN_CTRL(port); ctrl_mask = HS_CTRL_FIFO_FULL; } /* note: this is never true for reads */ if (packet.payload_length) { if (intel_wait_for_register(dev_priv, MIPI_GEN_FIFO_STAT(port), data_mask, 0, 50)) DRM_ERROR("Timeout waiting for HS/LP DATA FIFO !full\n"); write_data(dev_priv, data_reg, packet.payload, packet.payload_length); } if (msg->rx_len) { I915_WRITE(MIPI_INTR_STAT(port), GEN_READ_DATA_AVAIL); } if (intel_wait_for_register(dev_priv, MIPI_GEN_FIFO_STAT(port), ctrl_mask, 0, 50)) { DRM_ERROR("Timeout waiting for HS/LP CTRL FIFO !full\n"); } I915_WRITE(ctrl_reg, header[2] << 16 | header[1] << 8 | header[0]); /* ->rx_len is set only for reads */ if (msg->rx_len) { data_mask = GEN_READ_DATA_AVAIL; if (intel_wait_for_register(dev_priv, MIPI_INTR_STAT(port), data_mask, data_mask, 50)) DRM_ERROR("Timeout waiting for read data.\n"); read_data(dev_priv, data_reg, msg->rx_buf, msg->rx_len); } /* XXX: fix for reads and writes */ return 4 + packet.payload_length; } static int intel_dsi_host_attach(struct mipi_dsi_host *host, struct mipi_dsi_device *dsi) { return 0; } static int intel_dsi_host_detach(struct mipi_dsi_host *host, struct mipi_dsi_device *dsi) { return 0; } static const struct mipi_dsi_host_ops intel_dsi_host_ops = { .attach = intel_dsi_host_attach, .detach = intel_dsi_host_detach, .transfer = intel_dsi_host_transfer, }; static struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi, enum port port) { struct intel_dsi_host *host; struct mipi_dsi_device *device; host = kzalloc(sizeof(*host), GFP_KERNEL); if (!host) return NULL; host->base.ops = &intel_dsi_host_ops; host->intel_dsi = intel_dsi; host->port = port; /* * We should call mipi_dsi_host_register(&host->base) here, but we don't * have a host->dev, and we don't have OF stuff either. So just use the * dsi framework as a library and hope for the best. Create the dsi * devices by ourselves here too. Need to be careful though, because we * don't initialize any of the driver model devices here. */ device = kzalloc(sizeof(*device), GFP_KERNEL); if (!device) { kfree(host); return NULL; } device->host = &host->base; host->device = device; return host; } /* * send a video mode command * * XXX: commands with data in MIPI_DPI_DATA? */ static int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs, enum port port) { struct drm_encoder *encoder = &intel_dsi->base.base; struct drm_device *dev = encoder->dev; struct drm_i915_private *dev_priv = to_i915(dev); u32 mask; /* XXX: pipe, hs */ if (hs) cmd &= ~DPI_LP_MODE; else cmd |= DPI_LP_MODE; /* clear bit */ I915_WRITE(MIPI_INTR_STAT(port), SPL_PKT_SENT_INTERRUPT); /* XXX: old code skips write if control unchanged */ if (cmd == I915_READ(MIPI_DPI_CONTROL(port))) DRM_ERROR("Same special packet %02x twice in a row.\n", cmd); I915_WRITE(MIPI_DPI_CONTROL(port), cmd); mask = SPL_PKT_SENT_INTERRUPT; if (intel_wait_for_register(dev_priv, MIPI_INTR_STAT(port), mask, mask, 100)) DRM_ERROR("Video mode command 0x%08x send failed.\n", cmd); return 0; } static void band_gap_reset(struct drm_i915_private *dev_priv) { mutex_lock(&dev_priv->sb_lock); vlv_flisdsi_write(dev_priv, 0x08, 0x0001); vlv_flisdsi_write(dev_priv, 0x0F, 0x0005); vlv_flisdsi_write(dev_priv, 0x0F, 0x0025); udelay(150); vlv_flisdsi_write(dev_priv, 0x0F, 0x0000); vlv_flisdsi_write(dev_priv, 0x08, 0x0000); mutex_unlock(&dev_priv->sb_lock); } static inline bool is_vid_mode(struct intel_dsi *intel_dsi) { return intel_dsi->operation_mode == INTEL_DSI_VIDEO_MODE; } static inline bool is_cmd_mode(struct intel_dsi *intel_dsi) { return intel_dsi->operation_mode == INTEL_DSI_COMMAND_MODE; } static bool intel_dsi_compute_config(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config, struct drm_connector_state *conn_state) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_dsi *intel_dsi = container_of(encoder, struct intel_dsi, base); struct intel_connector *intel_connector = intel_dsi->attached_connector; struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc); const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode; struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; int ret; DRM_DEBUG_KMS("\n"); if (fixed_mode) { intel_fixed_panel_mode(fixed_mode, adjusted_mode); if (HAS_GMCH_DISPLAY(dev_priv)) intel_gmch_panel_fitting(crtc, pipe_config, conn_state->scaling_mode); else intel_pch_panel_fitting(crtc, pipe_config, conn_state->scaling_mode); } /* DSI uses short packets for sync events, so clear mode flags for DSI */ adjusted_mode->flags = 0; if (IS_GEN9_LP(dev_priv)) { /* Dual link goes to DSI transcoder A. */ if (intel_dsi->ports == BIT(PORT_C)) pipe_config->cpu_transcoder = TRANSCODER_DSI_C; else pipe_config->cpu_transcoder = TRANSCODER_DSI_A; } ret = intel_compute_dsi_pll(encoder, pipe_config); if (ret) return false; pipe_config->clock_set = true; return true; } static void glk_dsi_device_ready(struct intel_encoder *encoder) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); enum port port; u32 tmp, val; /* Set the MIPI mode * If MIPI_Mode is off, then writing to LP_Wake bit is not reflecting. * Power ON MIPI IO first and then write into IO reset and LP wake bits */ for_each_dsi_port(port, intel_dsi->ports) { tmp = I915_READ(MIPI_CTRL(port)); I915_WRITE(MIPI_CTRL(port), tmp | GLK_MIPIIO_ENABLE); } /* Put the IO into reset */ tmp = I915_READ(MIPI_CTRL(PORT_A)); tmp &= ~GLK_MIPIIO_RESET_RELEASED; I915_WRITE(MIPI_CTRL(PORT_A), tmp); /* Program LP Wake */ for_each_dsi_port(port, intel_dsi->ports) { tmp = I915_READ(MIPI_CTRL(port)); tmp |= GLK_LP_WAKE; I915_WRITE(MIPI_CTRL(port), tmp); } /* Wait for Pwr ACK */ for_each_dsi_port(port, intel_dsi->ports) { if (intel_wait_for_register(dev_priv, MIPI_CTRL(port), GLK_MIPIIO_PORT_POWERED, GLK_MIPIIO_PORT_POWERED, 20)) DRM_ERROR("MIPIO port is powergated\n"); } /* Wait for MIPI PHY status bit to set */ for_each_dsi_port(port, intel_dsi->ports) { if (intel_wait_for_register(dev_priv, MIPI_CTRL(port), GLK_PHY_STATUS_PORT_READY, GLK_PHY_STATUS_PORT_READY, 20)) DRM_ERROR("PHY is not ON\n"); } /* Get IO out of reset */ tmp = I915_READ(MIPI_CTRL(PORT_A)); I915_WRITE(MIPI_CTRL(PORT_A), tmp | GLK_MIPIIO_RESET_RELEASED); /* Get IO out of Low power state*/ for_each_dsi_port(port, intel_dsi->ports) { if (!(I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY)) { val = I915_READ(MIPI_DEVICE_READY(port)); val &= ~ULPS_STATE_MASK; val |= DEVICE_READY; I915_WRITE(MIPI_DEVICE_READY(port), val); usleep_range(10, 15); } /* Enter ULPS */ val = I915_READ(MIPI_DEVICE_READY(port)); val &= ~ULPS_STATE_MASK; val |= (ULPS_STATE_ENTER | DEVICE_READY); I915_WRITE(MIPI_DEVICE_READY(port), val); /* Wait for ULPS active */ if (intel_wait_for_register(dev_priv, MIPI_CTRL(port), GLK_ULPS_NOT_ACTIVE, 0, 20)) DRM_ERROR("ULPS not active\n"); /* Exit ULPS */ val = I915_READ(MIPI_DEVICE_READY(port)); val &= ~ULPS_STATE_MASK; val |= (ULPS_STATE_EXIT | DEVICE_READY); I915_WRITE(MIPI_DEVICE_READY(port), val); /* Enter Normal Mode */ val = I915_READ(MIPI_DEVICE_READY(port)); val &= ~ULPS_STATE_MASK; val |= (ULPS_STATE_NORMAL_OPERATION | DEVICE_READY); I915_WRITE(MIPI_DEVICE_READY(port), val); tmp = I915_READ(MIPI_CTRL(port)); tmp &= ~GLK_LP_WAKE; I915_WRITE(MIPI_CTRL(port), tmp); } /* Wait for Stop state */ for_each_dsi_port(port, intel_dsi->ports) { if (intel_wait_for_register(dev_priv, MIPI_CTRL(port), GLK_DATA_LANE_STOP_STATE, GLK_DATA_LANE_STOP_STATE, 20)) DRM_ERROR("Date lane not in STOP state\n"); } /* Wait for AFE LATCH */ for_each_dsi_port(port, intel_dsi->ports) { if (intel_wait_for_register(dev_priv, BXT_MIPI_PORT_CTRL(port), AFE_LATCHOUT, AFE_LATCHOUT, 20)) DRM_ERROR("D-PHY not entering LP-11 state\n"); } } static void bxt_dsi_device_ready(struct intel_encoder *encoder) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); enum port port; u32 val; DRM_DEBUG_KMS("\n"); /* Enable MIPI PHY transparent latch */ for_each_dsi_port(port, intel_dsi->ports) { val = I915_READ(BXT_MIPI_PORT_CTRL(port)); I915_WRITE(BXT_MIPI_PORT_CTRL(port), val | LP_OUTPUT_HOLD); usleep_range(2000, 2500); } /* Clear ULPS and set device ready */ for_each_dsi_port(port, intel_dsi->ports) { val = I915_READ(MIPI_DEVICE_READY(port)); val &= ~ULPS_STATE_MASK; I915_WRITE(MIPI_DEVICE_READY(port), val); usleep_range(2000, 2500); val |= DEVICE_READY; I915_WRITE(MIPI_DEVICE_READY(port), val); } } static void vlv_dsi_device_ready(struct intel_encoder *encoder) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); enum port port; u32 val; DRM_DEBUG_KMS("\n"); mutex_lock(&dev_priv->sb_lock); /* program rcomp for compliance, reduce from 50 ohms to 45 ohms * needed everytime after power gate */ vlv_flisdsi_write(dev_priv, 0x04, 0x0004); mutex_unlock(&dev_priv->sb_lock); /* bandgap reset is needed after everytime we do power gate */ band_gap_reset(dev_priv); for_each_dsi_port(port, intel_dsi->ports) { I915_WRITE(MIPI_DEVICE_READY(port), ULPS_STATE_ENTER); usleep_range(2500, 3000); /* Enable MIPI PHY transparent latch * Common bit for both MIPI Port A & MIPI Port C * No similar bit in MIPI Port C reg */ val = I915_READ(MIPI_PORT_CTRL(PORT_A)); I915_WRITE(MIPI_PORT_CTRL(PORT_A), val | LP_OUTPUT_HOLD); usleep_range(1000, 1500); I915_WRITE(MIPI_DEVICE_READY(port), ULPS_STATE_EXIT); usleep_range(2500, 3000); I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY); usleep_range(2500, 3000); } } static void intel_dsi_device_ready(struct intel_encoder *encoder) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) vlv_dsi_device_ready(encoder); else if (IS_BROXTON(dev_priv)) bxt_dsi_device_ready(encoder); else if (IS_GEMINILAKE(dev_priv)) glk_dsi_device_ready(encoder); } static void glk_dsi_enter_low_power_mode(struct intel_encoder *encoder) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); enum port port; u32 val; /* Enter ULPS */ for_each_dsi_port(port, intel_dsi->ports) { val = I915_READ(MIPI_DEVICE_READY(port)); val &= ~ULPS_STATE_MASK; val |= (ULPS_STATE_ENTER | DEVICE_READY); I915_WRITE(MIPI_DEVICE_READY(port), val); } /* Wait for MIPI PHY status bit to unset */ for_each_dsi_port(port, intel_dsi->ports) { if (intel_wait_for_register(dev_priv, MIPI_CTRL(port), GLK_PHY_STATUS_PORT_READY, 0, 20)) DRM_ERROR("PHY is not turning OFF\n"); } /* Wait for Pwr ACK bit to unset */ for_each_dsi_port(port, intel_dsi->ports) { if (intel_wait_for_register(dev_priv, MIPI_CTRL(port), GLK_MIPIIO_PORT_POWERED, 0, 20)) DRM_ERROR("MIPI IO Port is not powergated\n"); } } static void glk_dsi_disable_mipi_io(struct intel_encoder *encoder) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); enum port port; u32 tmp; /* Put the IO into reset */ tmp = I915_READ(MIPI_CTRL(PORT_A)); tmp &= ~GLK_MIPIIO_RESET_RELEASED; I915_WRITE(MIPI_CTRL(PORT_A), tmp); /* Wait for MIPI PHY status bit to unset */ for_each_dsi_port(port, intel_dsi->ports) { if (intel_wait_for_register(dev_priv, MIPI_CTRL(port), GLK_PHY_STATUS_PORT_READY, 0, 20)) DRM_ERROR("PHY is not turning OFF\n"); } /* Clear MIPI mode */ for_each_dsi_port(port, intel_dsi->ports) { tmp = I915_READ(MIPI_CTRL(port)); tmp &= ~GLK_MIPIIO_ENABLE; I915_WRITE(MIPI_CTRL(port), tmp); } } static void glk_dsi_clear_device_ready(struct intel_encoder *encoder) { glk_dsi_enter_low_power_mode(encoder); glk_dsi_disable_mipi_io(encoder); } static void vlv_dsi_clear_device_ready(struct intel_encoder *encoder) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); enum port port; DRM_DEBUG_KMS("\n"); for_each_dsi_port(port, intel_dsi->ports) { /* Common bit for both MIPI Port A & MIPI Port C on VLV/CHV */ i915_reg_t port_ctrl = IS_GEN9_LP(dev_priv) ? BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(PORT_A); u32 val; I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY | ULPS_STATE_ENTER); usleep_range(2000, 2500); I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY | ULPS_STATE_EXIT); usleep_range(2000, 2500); I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY | ULPS_STATE_ENTER); usleep_range(2000, 2500); /* * On VLV/CHV, wait till Clock lanes are in LP-00 state for MIPI * Port A only. MIPI Port C has no similar bit for checking. */ if ((IS_GEN9_LP(dev_priv) || port == PORT_A) && intel_wait_for_register(dev_priv, port_ctrl, AFE_LATCHOUT, 0, 30)) DRM_ERROR("DSI LP not going Low\n"); /* Disable MIPI PHY transparent latch */ val = I915_READ(port_ctrl); I915_WRITE(port_ctrl, val & ~LP_OUTPUT_HOLD); usleep_range(1000, 1500); I915_WRITE(MIPI_DEVICE_READY(port), 0x00); usleep_range(2000, 2500); } } static void intel_dsi_port_enable(struct intel_encoder *encoder) { struct drm_device *dev = encoder->base.dev; struct drm_i915_private *dev_priv = to_i915(dev); struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); enum port port; if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) { u32 temp; if (IS_GEN9_LP(dev_priv)) { for_each_dsi_port(port, intel_dsi->ports) { temp = I915_READ(MIPI_CTRL(port)); temp &= ~BXT_PIXEL_OVERLAP_CNT_MASK | intel_dsi->pixel_overlap << BXT_PIXEL_OVERLAP_CNT_SHIFT; I915_WRITE(MIPI_CTRL(port), temp); } } else { temp = I915_READ(VLV_CHICKEN_3); temp &= ~PIXEL_OVERLAP_CNT_MASK | intel_dsi->pixel_overlap << PIXEL_OVERLAP_CNT_SHIFT; I915_WRITE(VLV_CHICKEN_3, temp); } } for_each_dsi_port(port, intel_dsi->ports) { i915_reg_t port_ctrl = IS_GEN9_LP(dev_priv) ? BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port); u32 temp; temp = I915_READ(port_ctrl); temp &= ~LANE_CONFIGURATION_MASK; temp &= ~DUAL_LINK_MODE_MASK; if (intel_dsi->ports == (BIT(PORT_A) | BIT(PORT_C))) { temp |= (intel_dsi->dual_link - 1) << DUAL_LINK_MODE_SHIFT; if (IS_BROXTON(dev_priv)) temp |= LANE_CONFIGURATION_DUAL_LINK_A; else temp |= intel_crtc->pipe ? LANE_CONFIGURATION_DUAL_LINK_B : LANE_CONFIGURATION_DUAL_LINK_A; } /* assert ip_tg_enable signal */ I915_WRITE(port_ctrl, temp | DPI_ENABLE); POSTING_READ(port_ctrl); } } static void intel_dsi_port_disable(struct intel_encoder *encoder) { struct drm_device *dev = encoder->base.dev; struct drm_i915_private *dev_priv = to_i915(dev); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); enum port port; for_each_dsi_port(port, intel_dsi->ports) { i915_reg_t port_ctrl = IS_GEN9_LP(dev_priv) ? BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port); u32 temp; /* de-assert ip_tg_enable signal */ temp = I915_READ(port_ctrl); I915_WRITE(port_ctrl, temp & ~DPI_ENABLE); POSTING_READ(port_ctrl); } } static void intel_dsi_prepare(struct intel_encoder *intel_encoder, struct intel_crtc_state *pipe_config); static void intel_dsi_unprepare(struct intel_encoder *encoder); static void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec) { struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev); /* For v3 VBTs in vid-mode the delays are part of the VBT sequences */ if (is_vid_mode(intel_dsi) && dev_priv->vbt.dsi.seq_version >= 3) return; msleep(msec); } /* * Panel enable/disable sequences from the VBT spec. * * Note the spec has AssertReset / DeassertReset swapped from their * usual naming. We use the normal names to avoid confusion (so below * they are swapped compared to the spec). * * Steps starting with MIPI refer to VBT sequences, note that for v2 * VBTs several steps which have a VBT in v2 are expected to be handled * directly by the driver, by directly driving gpios for example. * * v2 video mode seq v3 video mode seq command mode seq * - power on - MIPIPanelPowerOn - power on * - wait t1+t2 - wait t1+t2 * - MIPIDeassertResetPin - MIPIDeassertResetPin - MIPIDeassertResetPin * - io lines to lp-11 - io lines to lp-11 - io lines to lp-11 * - MIPISendInitialDcsCmds - MIPISendInitialDcsCmds - MIPISendInitialDcsCmds * - MIPITearOn * - MIPIDisplayOn * - turn on DPI - turn on DPI - set pipe to dsr mode * - MIPIDisplayOn - MIPIDisplayOn * - wait t5 - wait t5 * - backlight on - MIPIBacklightOn - backlight on * ... ... ... issue mem cmds ... * - backlight off - MIPIBacklightOff - backlight off * - wait t6 - wait t6 * - MIPIDisplayOff * - turn off DPI - turn off DPI - disable pipe dsr mode * - MIPITearOff * - MIPIDisplayOff - MIPIDisplayOff * - io lines to lp-00 - io lines to lp-00 - io lines to lp-00 * - MIPIAssertResetPin - MIPIAssertResetPin - MIPIAssertResetPin * - wait t3 - wait t3 * - power off - MIPIPanelPowerOff - power off * - wait t4 - wait t4 */ static void intel_dsi_pre_enable(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config, struct drm_connector_state *conn_state) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); enum port port; u32 val; DRM_DEBUG_KMS("\n"); /* * The BIOS may leave the PLL in a wonky state where it doesn't * lock. It needs to be fully powered down to fix it. */ intel_disable_dsi_pll(encoder); intel_enable_dsi_pll(encoder, pipe_config); if (IS_BROXTON(dev_priv)) { /* Add MIPI IO reset programming for modeset */ val = I915_READ(BXT_P_CR_GT_DISP_PWRON); I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val | MIPIO_RST_CTRL); /* Power up DSI regulator */ I915_WRITE(BXT_P_DSI_REGULATOR_CFG, STAP_SELECT); I915_WRITE(BXT_P_DSI_REGULATOR_TX_CTRL, 0); } if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { u32 val; /* Disable DPOunit clock gating, can stall pipe */ val = I915_READ(DSPCLK_GATE_D); val |= DPOUNIT_CLOCK_GATE_DISABLE; I915_WRITE(DSPCLK_GATE_D, val); } intel_dsi_prepare(encoder, pipe_config); /* Power on, try both CRC pmic gpio and VBT */ if (intel_dsi->gpio_panel) gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1); intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_ON); intel_dsi_msleep(intel_dsi, intel_dsi->panel_on_delay); /* Deassert reset */ intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DEASSERT_RESET); /* Put device in ready state (LP-11) */ intel_dsi_device_ready(encoder); /* Send initialization commands in LP mode */ intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_INIT_OTP); /* Enable port in pre-enable phase itself because as per hw team * recommendation, port should be enabled befor plane & pipe */ if (is_cmd_mode(intel_dsi)) { for_each_dsi_port(port, intel_dsi->ports) I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(port), 8 * 4); intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_TEAR_ON); intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON); } else { msleep(20); /* XXX */ for_each_dsi_port(port, intel_dsi->ports) dpi_send_cmd(intel_dsi, TURN_ON, false, port); intel_dsi_msleep(intel_dsi, 100); intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON); intel_dsi_port_enable(encoder); } intel_panel_enable_backlight(pipe_config, conn_state); intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_ON); } /* * DSI port enable has to be done before pipe and plane enable, so we do it in * the pre_enable hook. */ static void intel_dsi_enable_nop(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config, struct drm_connector_state *conn_state) { DRM_DEBUG_KMS("\n"); } /* * DSI port disable has to be done after pipe and plane disable, so we do it in * the post_disable hook. */ static void intel_dsi_disable(struct intel_encoder *encoder, struct intel_crtc_state *old_crtc_state, struct drm_connector_state *old_conn_state) { struct drm_device *dev = encoder->base.dev; struct drm_i915_private *dev_priv = dev->dev_private; struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); enum port port; DRM_DEBUG_KMS("\n"); intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_OFF); intel_panel_disable_backlight(old_conn_state); /* * Disable Device ready before the port shutdown in order * to avoid split screen */ if (IS_BROXTON(dev_priv)) { for_each_dsi_port(port, intel_dsi->ports) I915_WRITE(MIPI_DEVICE_READY(port), 0); } /* * According to the spec we should send SHUTDOWN before * MIPI_SEQ_DISPLAY_OFF only for v3+ VBTs, but field testing * has shown that the v3 sequence works for v2 VBTs too */ if (is_vid_mode(intel_dsi)) { /* Send Shutdown command to the panel in LP mode */ for_each_dsi_port(port, intel_dsi->ports) dpi_send_cmd(intel_dsi, SHUTDOWN, false, port); msleep(10); } } static void intel_dsi_clear_device_ready(struct intel_encoder *encoder) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv) || IS_BROXTON(dev_priv)) vlv_dsi_clear_device_ready(encoder); else if (IS_GEMINILAKE(dev_priv)) glk_dsi_clear_device_ready(encoder); } static void intel_dsi_post_disable(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config, struct drm_connector_state *conn_state) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); enum port port; u32 val; DRM_DEBUG_KMS("\n"); if (is_vid_mode(intel_dsi)) { for_each_dsi_port(port, intel_dsi->ports) wait_for_dsi_fifo_empty(intel_dsi, port); intel_dsi_port_disable(encoder); usleep_range(2000, 5000); } intel_dsi_unprepare(encoder); /* * if disable packets are sent before sending shutdown packet then in * some next enable sequence send turn on packet error is observed */ if (is_cmd_mode(intel_dsi)) intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_TEAR_OFF); intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_OFF); /* Transition to LP-00 */ intel_dsi_clear_device_ready(encoder); if (IS_BROXTON(dev_priv)) { /* Power down DSI regulator to save power */ I915_WRITE(BXT_P_DSI_REGULATOR_CFG, STAP_SELECT); I915_WRITE(BXT_P_DSI_REGULATOR_TX_CTRL, HS_IO_CTRL_SELECT); /* Add MIPI IO reset programming for modeset */ val = I915_READ(BXT_P_CR_GT_DISP_PWRON); I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val & ~MIPIO_RST_CTRL); } intel_disable_dsi_pll(encoder); if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { u32 val; val = I915_READ(DSPCLK_GATE_D); val &= ~DPOUNIT_CLOCK_GATE_DISABLE; I915_WRITE(DSPCLK_GATE_D, val); } /* Assert reset */ intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_ASSERT_RESET); /* Power off, try both CRC pmic gpio and VBT */ intel_dsi_msleep(intel_dsi, intel_dsi->panel_off_delay); intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_OFF); if (intel_dsi->gpio_panel) gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0); /* * FIXME As we do with eDP, just make a note of the time here * and perform the wait before the next panel power on. */ intel_dsi_msleep(intel_dsi, intel_dsi->panel_pwr_cycle_delay); } static bool intel_dsi_get_hw_state(struct intel_encoder *encoder, enum pipe *pipe) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); enum port port; bool active = false; DRM_DEBUG_KMS("\n"); if (!intel_display_power_get_if_enabled(dev_priv, encoder->power_domain)) return false; /* * On Broxton the PLL needs to be enabled with a valid divider * configuration, otherwise accessing DSI registers will hang the * machine. See BSpec North Display Engine registers/MIPI[BXT]. */ if (IS_GEN9_LP(dev_priv) && !intel_dsi_pll_is_enabled(dev_priv)) goto out_put_power; /* XXX: this only works for one DSI output */ for_each_dsi_port(port, intel_dsi->ports) { i915_reg_t ctrl_reg = IS_GEN9_LP(dev_priv) ? BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port); bool enabled = I915_READ(ctrl_reg) & DPI_ENABLE; /* * Due to some hardware limitations on VLV/CHV, the DPI enable * bit in port C control register does not get set. As a * workaround, check pipe B conf instead. */ if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) && port == PORT_C) enabled = I915_READ(PIPECONF(PIPE_B)) & PIPECONF_ENABLE; /* Try command mode if video mode not enabled */ if (!enabled) { u32 tmp = I915_READ(MIPI_DSI_FUNC_PRG(port)); enabled = tmp & CMD_MODE_DATA_WIDTH_MASK; } if (!enabled) continue; if (!(I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY)) continue; if (IS_GEN9_LP(dev_priv)) { u32 tmp = I915_READ(MIPI_CTRL(port)); tmp &= BXT_PIPE_SELECT_MASK; tmp >>= BXT_PIPE_SELECT_SHIFT; if (WARN_ON(tmp > PIPE_C)) continue; *pipe = tmp; } else { *pipe = port == PORT_A ? PIPE_A : PIPE_B; } active = true; break; } out_put_power: intel_display_power_put(dev_priv, encoder->power_domain); return active; } static void bxt_dsi_get_pipe_config(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config) { struct drm_device *dev = encoder->base.dev; struct drm_i915_private *dev_priv = to_i915(dev); struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; struct drm_display_mode *adjusted_mode_sw; struct intel_crtc *intel_crtc; struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); unsigned int lane_count = intel_dsi->lane_count; unsigned int bpp, fmt; enum port port; u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp; u16 hfp_sw, hsync_sw, hbp_sw; u16 crtc_htotal_sw, crtc_hsync_start_sw, crtc_hsync_end_sw, crtc_hblank_start_sw, crtc_hblank_end_sw; /* FIXME: hw readout should not depend on SW state */ intel_crtc = to_intel_crtc(encoder->base.crtc); adjusted_mode_sw = &intel_crtc->config->base.adjusted_mode; /* * Atleast one port is active as encoder->get_config called only if * encoder->get_hw_state() returns true. */ for_each_dsi_port(port, intel_dsi->ports) { if (I915_READ(BXT_MIPI_PORT_CTRL(port)) & DPI_ENABLE) break; } fmt = I915_READ(MIPI_DSI_FUNC_PRG(port)) & VID_MODE_FORMAT_MASK; pipe_config->pipe_bpp = mipi_dsi_pixel_format_to_bpp( pixel_format_from_register_bits(fmt)); bpp = pipe_config->pipe_bpp; /* In terms of pixels */ adjusted_mode->crtc_hdisplay = I915_READ(BXT_MIPI_TRANS_HACTIVE(port)); adjusted_mode->crtc_vdisplay = I915_READ(BXT_MIPI_TRANS_VACTIVE(port)); adjusted_mode->crtc_vtotal = I915_READ(BXT_MIPI_TRANS_VTOTAL(port)); hactive = adjusted_mode->crtc_hdisplay; hfp = I915_READ(MIPI_HFP_COUNT(port)); /* * Meaningful for video mode non-burst sync pulse mode only, * can be zero for non-burst sync events and burst modes */ hsync = I915_READ(MIPI_HSYNC_PADDING_COUNT(port)); hbp = I915_READ(MIPI_HBP_COUNT(port)); /* harizontal values are in terms of high speed byte clock */ hfp = pixels_from_txbyteclkhs(hfp, bpp, lane_count, intel_dsi->burst_mode_ratio); hsync = pixels_from_txbyteclkhs(hsync, bpp, lane_count, intel_dsi->burst_mode_ratio); hbp = pixels_from_txbyteclkhs(hbp, bpp, lane_count, intel_dsi->burst_mode_ratio); if (intel_dsi->dual_link) { hfp *= 2; hsync *= 2; hbp *= 2; } /* vertical values are in terms of lines */ vfp = I915_READ(MIPI_VFP_COUNT(port)); vsync = I915_READ(MIPI_VSYNC_PADDING_COUNT(port)); vbp = I915_READ(MIPI_VBP_COUNT(port)); adjusted_mode->crtc_htotal = hactive + hfp + hsync + hbp; adjusted_mode->crtc_hsync_start = hfp + adjusted_mode->crtc_hdisplay; adjusted_mode->crtc_hsync_end = hsync + adjusted_mode->crtc_hsync_start; adjusted_mode->crtc_hblank_start = adjusted_mode->crtc_hdisplay; adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_htotal; adjusted_mode->crtc_vsync_start = vfp + adjusted_mode->crtc_vdisplay; adjusted_mode->crtc_vsync_end = vsync + adjusted_mode->crtc_vsync_start; adjusted_mode->crtc_vblank_start = adjusted_mode->crtc_vdisplay; adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vtotal; /* * In BXT DSI there is no regs programmed with few horizontal timings * in Pixels but txbyteclkhs.. So retrieval process adds some * ROUND_UP ERRORS in the process of PIXELS<==>txbyteclkhs. * Actually here for the given adjusted_mode, we are calculating the * value programmed to the port and then back to the horizontal timing * param in pixels. This is the expected value, including roundup errors * And if that is same as retrieved value from port, then * (HW state) adjusted_mode's horizontal timings are corrected to * match with SW state to nullify the errors. */ /* Calculating the value programmed to the Port register */ hfp_sw = adjusted_mode_sw->crtc_hsync_start - adjusted_mode_sw->crtc_hdisplay; hsync_sw = adjusted_mode_sw->crtc_hsync_end - adjusted_mode_sw->crtc_hsync_start; hbp_sw = adjusted_mode_sw->crtc_htotal - adjusted_mode_sw->crtc_hsync_end; if (intel_dsi->dual_link) { hfp_sw /= 2; hsync_sw /= 2; hbp_sw /= 2; } hfp_sw = txbyteclkhs(hfp_sw, bpp, lane_count, intel_dsi->burst_mode_ratio); hsync_sw = txbyteclkhs(hsync_sw, bpp, lane_count, intel_dsi->burst_mode_ratio); hbp_sw = txbyteclkhs(hbp_sw, bpp, lane_count, intel_dsi->burst_mode_ratio); /* Reverse calculating the adjusted mode parameters from port reg vals*/ hfp_sw = pixels_from_txbyteclkhs(hfp_sw, bpp, lane_count, intel_dsi->burst_mode_ratio); hsync_sw = pixels_from_txbyteclkhs(hsync_sw, bpp, lane_count, intel_dsi->burst_mode_ratio); hbp_sw = pixels_from_txbyteclkhs(hbp_sw, bpp, lane_count, intel_dsi->burst_mode_ratio); if (intel_dsi->dual_link) { hfp_sw *= 2; hsync_sw *= 2; hbp_sw *= 2; } crtc_htotal_sw = adjusted_mode_sw->crtc_hdisplay + hfp_sw + hsync_sw + hbp_sw; crtc_hsync_start_sw = hfp_sw + adjusted_mode_sw->crtc_hdisplay; crtc_hsync_end_sw = hsync_sw + crtc_hsync_start_sw; crtc_hblank_start_sw = adjusted_mode_sw->crtc_hdisplay; crtc_hblank_end_sw = crtc_htotal_sw; if (adjusted_mode->crtc_htotal == crtc_htotal_sw) adjusted_mode->crtc_htotal = adjusted_mode_sw->crtc_htotal; if (adjusted_mode->crtc_hsync_start == crtc_hsync_start_sw) adjusted_mode->crtc_hsync_start = adjusted_mode_sw->crtc_hsync_start; if (adjusted_mode->crtc_hsync_end == crtc_hsync_end_sw) adjusted_mode->crtc_hsync_end = adjusted_mode_sw->crtc_hsync_end; if (adjusted_mode->crtc_hblank_start == crtc_hblank_start_sw) adjusted_mode->crtc_hblank_start = adjusted_mode_sw->crtc_hblank_start; if (adjusted_mode->crtc_hblank_end == crtc_hblank_end_sw) adjusted_mode->crtc_hblank_end = adjusted_mode_sw->crtc_hblank_end; } static void intel_dsi_get_config(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); u32 pclk; DRM_DEBUG_KMS("\n"); if (IS_GEN9_LP(dev_priv)) bxt_dsi_get_pipe_config(encoder, pipe_config); pclk = intel_dsi_get_pclk(encoder, pipe_config->pipe_bpp, pipe_config); if (!pclk) return; pipe_config->base.adjusted_mode.crtc_clock = pclk; pipe_config->port_clock = pclk; } static enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { struct intel_connector *intel_connector = to_intel_connector(connector); const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode; int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; DRM_DEBUG_KMS("\n"); if (mode->flags & DRM_MODE_FLAG_DBLSCAN) { DRM_DEBUG_KMS("MODE_NO_DBLESCAN\n"); return MODE_NO_DBLESCAN; } if (fixed_mode) { if (mode->hdisplay > fixed_mode->hdisplay) return MODE_PANEL; if (mode->vdisplay > fixed_mode->vdisplay) return MODE_PANEL; if (fixed_mode->clock > max_dotclk) return MODE_CLOCK_HIGH; } return MODE_OK; } /* return txclkesc cycles in terms of divider and duration in us */ static u16 txclkesc(u32 divider, unsigned int us) { switch (divider) { case ESCAPE_CLOCK_DIVIDER_1: default: return 20 * us; case ESCAPE_CLOCK_DIVIDER_2: return 10 * us; case ESCAPE_CLOCK_DIVIDER_4: return 5 * us; } } static void set_dsi_timings(struct drm_encoder *encoder, const struct drm_display_mode *adjusted_mode) { struct drm_device *dev = encoder->dev; struct drm_i915_private *dev_priv = to_i915(dev); struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder); enum port port; unsigned int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format); unsigned int lane_count = intel_dsi->lane_count; u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp; hactive = adjusted_mode->crtc_hdisplay; hfp = adjusted_mode->crtc_hsync_start - adjusted_mode->crtc_hdisplay; hsync = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start; hbp = adjusted_mode->crtc_htotal - adjusted_mode->crtc_hsync_end; if (intel_dsi->dual_link) { hactive /= 2; if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) hactive += intel_dsi->pixel_overlap; hfp /= 2; hsync /= 2; hbp /= 2; } vfp = adjusted_mode->crtc_vsync_start - adjusted_mode->crtc_vdisplay; vsync = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start; vbp = adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vsync_end; /* horizontal values are in terms of high speed byte clock */ hactive = txbyteclkhs(hactive, bpp, lane_count, intel_dsi->burst_mode_ratio); hfp = txbyteclkhs(hfp, bpp, lane_count, intel_dsi->burst_mode_ratio); hsync = txbyteclkhs(hsync, bpp, lane_count, intel_dsi->burst_mode_ratio); hbp = txbyteclkhs(hbp, bpp, lane_count, intel_dsi->burst_mode_ratio); for_each_dsi_port(port, intel_dsi->ports) { if (IS_GEN9_LP(dev_priv)) { /* * Program hdisplay and vdisplay on MIPI transcoder. * This is different from calculated hactive and * vactive, as they are calculated per channel basis, * whereas these values should be based on resolution. */ I915_WRITE(BXT_MIPI_TRANS_HACTIVE(port), adjusted_mode->crtc_hdisplay); I915_WRITE(BXT_MIPI_TRANS_VACTIVE(port), adjusted_mode->crtc_vdisplay); I915_WRITE(BXT_MIPI_TRANS_VTOTAL(port), adjusted_mode->crtc_vtotal); } I915_WRITE(MIPI_HACTIVE_AREA_COUNT(port), hactive); I915_WRITE(MIPI_HFP_COUNT(port), hfp); /* meaningful for video mode non-burst sync pulse mode only, * can be zero for non-burst sync events and burst modes */ I915_WRITE(MIPI_HSYNC_PADDING_COUNT(port), hsync); I915_WRITE(MIPI_HBP_COUNT(port), hbp); /* vertical values are in terms of lines */ I915_WRITE(MIPI_VFP_COUNT(port), vfp); I915_WRITE(MIPI_VSYNC_PADDING_COUNT(port), vsync); I915_WRITE(MIPI_VBP_COUNT(port), vbp); } } static u32 pixel_format_to_reg(enum mipi_dsi_pixel_format fmt) { switch (fmt) { case MIPI_DSI_FMT_RGB888: return VID_MODE_FORMAT_RGB888; case MIPI_DSI_FMT_RGB666: return VID_MODE_FORMAT_RGB666; case MIPI_DSI_FMT_RGB666_PACKED: return VID_MODE_FORMAT_RGB666_PACKED; case MIPI_DSI_FMT_RGB565: return VID_MODE_FORMAT_RGB565; default: MISSING_CASE(fmt); return VID_MODE_FORMAT_RGB666; } } static void intel_dsi_prepare(struct intel_encoder *intel_encoder, struct intel_crtc_state *pipe_config) { struct drm_encoder *encoder = &intel_encoder->base; struct drm_device *dev = encoder->dev; struct drm_i915_private *dev_priv = to_i915(dev); struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc); struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder); const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; enum port port; unsigned int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format); u32 val, tmp; u16 mode_hdisplay; DRM_DEBUG_KMS("pipe %c\n", pipe_name(intel_crtc->pipe)); mode_hdisplay = adjusted_mode->crtc_hdisplay; if (intel_dsi->dual_link) { mode_hdisplay /= 2; if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) mode_hdisplay += intel_dsi->pixel_overlap; } for_each_dsi_port(port, intel_dsi->ports) { if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { /* * escape clock divider, 20MHz, shared for A and C. * device ready must be off when doing this! txclkesc? */ tmp = I915_READ(MIPI_CTRL(PORT_A)); tmp &= ~ESCAPE_CLOCK_DIVIDER_MASK; I915_WRITE(MIPI_CTRL(PORT_A), tmp | ESCAPE_CLOCK_DIVIDER_1); /* read request priority is per pipe */ tmp = I915_READ(MIPI_CTRL(port)); tmp &= ~READ_REQUEST_PRIORITY_MASK; I915_WRITE(MIPI_CTRL(port), tmp | READ_REQUEST_PRIORITY_HIGH); } else if (IS_GEN9_LP(dev_priv)) { enum pipe pipe = intel_crtc->pipe; tmp = I915_READ(MIPI_CTRL(port)); tmp &= ~BXT_PIPE_SELECT_MASK; tmp |= BXT_PIPE_SELECT(pipe); I915_WRITE(MIPI_CTRL(port), tmp); } /* XXX: why here, why like this? handling in irq handler?! */ I915_WRITE(MIPI_INTR_STAT(port), 0xffffffff); I915_WRITE(MIPI_INTR_EN(port), 0xffffffff); I915_WRITE(MIPI_DPHY_PARAM(port), intel_dsi->dphy_reg); I915_WRITE(MIPI_DPI_RESOLUTION(port), adjusted_mode->crtc_vdisplay << VERTICAL_ADDRESS_SHIFT | mode_hdisplay << HORIZONTAL_ADDRESS_SHIFT); } set_dsi_timings(encoder, adjusted_mode); val = intel_dsi->lane_count << DATA_LANES_PRG_REG_SHIFT; if (is_cmd_mode(intel_dsi)) { val |= intel_dsi->channel << CMD_MODE_CHANNEL_NUMBER_SHIFT; val |= CMD_MODE_DATA_WIDTH_8_BIT; /* XXX */ } else { val |= intel_dsi->channel << VID_MODE_CHANNEL_NUMBER_SHIFT; val |= pixel_format_to_reg(intel_dsi->pixel_format); } tmp = 0; if (intel_dsi->eotp_pkt == 0) tmp |= EOT_DISABLE; if (intel_dsi->clock_stop) tmp |= CLOCKSTOP; if (IS_GEN9_LP(dev_priv)) { tmp |= BXT_DPHY_DEFEATURE_EN; if (!is_cmd_mode(intel_dsi)) tmp |= BXT_DEFEATURE_DPI_FIFO_CTR; } for_each_dsi_port(port, intel_dsi->ports) { I915_WRITE(MIPI_DSI_FUNC_PRG(port), val); /* timeouts for recovery. one frame IIUC. if counter expires, * EOT and stop state. */ /* * In burst mode, value greater than one DPI line Time in byte * clock (txbyteclkhs) To timeout this timer 1+ of the above * said value is recommended. * * In non-burst mode, Value greater than one DPI frame time in * byte clock(txbyteclkhs) To timeout this timer 1+ of the above * said value is recommended. * * In DBI only mode, value greater than one DBI frame time in * byte clock(txbyteclkhs) To timeout this timer 1+ of the above * said value is recommended. */ if (is_vid_mode(intel_dsi) && intel_dsi->video_mode_format == VIDEO_MODE_BURST) { I915_WRITE(MIPI_HS_TX_TIMEOUT(port), txbyteclkhs(adjusted_mode->crtc_htotal, bpp, intel_dsi->lane_count, intel_dsi->burst_mode_ratio) + 1); } else { I915_WRITE(MIPI_HS_TX_TIMEOUT(port), txbyteclkhs(adjusted_mode->crtc_vtotal * adjusted_mode->crtc_htotal, bpp, intel_dsi->lane_count, intel_dsi->burst_mode_ratio) + 1); } I915_WRITE(MIPI_LP_RX_TIMEOUT(port), intel_dsi->lp_rx_timeout); I915_WRITE(MIPI_TURN_AROUND_TIMEOUT(port), intel_dsi->turn_arnd_val); I915_WRITE(MIPI_DEVICE_RESET_TIMER(port), intel_dsi->rst_timer_val); /* dphy stuff */ /* in terms of low power clock */ I915_WRITE(MIPI_INIT_COUNT(port), txclkesc(intel_dsi->escape_clk_div, 100)); if (IS_GEN9_LP(dev_priv) && (!intel_dsi->dual_link)) { /* * BXT spec says write MIPI_INIT_COUNT for * both the ports, even if only one is * getting used. So write the other port * if not in dual link mode. */ I915_WRITE(MIPI_INIT_COUNT(port == PORT_A ? PORT_C : PORT_A), intel_dsi->init_count); } /* recovery disables */ I915_WRITE(MIPI_EOT_DISABLE(port), tmp); /* in terms of low power clock */ I915_WRITE(MIPI_INIT_COUNT(port), intel_dsi->init_count); /* in terms of txbyteclkhs. actual high to low switch + * MIPI_STOP_STATE_STALL * MIPI_LP_BYTECLK. * * XXX: write MIPI_STOP_STATE_STALL? */ I915_WRITE(MIPI_HIGH_LOW_SWITCH_COUNT(port), intel_dsi->hs_to_lp_count); /* XXX: low power clock equivalence in terms of byte clock. * the number of byte clocks occupied in one low power clock. * based on txbyteclkhs and txclkesc. * txclkesc time / txbyteclk time * (105 + MIPI_STOP_STATE_STALL * ) / 105.??? */ I915_WRITE(MIPI_LP_BYTECLK(port), intel_dsi->lp_byte_clk); if (IS_GEMINILAKE(dev_priv)) { I915_WRITE(MIPI_TLPX_TIME_COUNT(port), intel_dsi->lp_byte_clk); /* Shadow of DPHY reg */ I915_WRITE(MIPI_CLK_LANE_TIMING(port), intel_dsi->dphy_reg); } /* the bw essential for transmitting 16 long packets containing * 252 bytes meant for dcs write memory command is programmed in * this register in terms of byte clocks. based on dsi transfer * rate and the number of lanes configured the time taken to * transmit 16 long packets in a dsi stream varies. */ I915_WRITE(MIPI_DBI_BW_CTRL(port), intel_dsi->bw_timer); I915_WRITE(MIPI_CLK_LANE_SWITCH_TIME_CNT(port), intel_dsi->clk_lp_to_hs_count << LP_HS_SSW_CNT_SHIFT | intel_dsi->clk_hs_to_lp_count << HS_LP_PWR_SW_CNT_SHIFT); if (is_vid_mode(intel_dsi)) /* Some panels might have resolution which is not a * multiple of 64 like 1366 x 768. Enable RANDOM * resolution support for such panels by default */ I915_WRITE(MIPI_VIDEO_MODE_FORMAT(port), intel_dsi->video_frmt_cfg_bits | intel_dsi->video_mode_format | IP_TG_CONFIG | RANDOM_DPI_DISPLAY_RESOLUTION); } } static void intel_dsi_unprepare(struct intel_encoder *encoder) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); enum port port; u32 val; if (!IS_GEMINILAKE(dev_priv)) { for_each_dsi_port(port, intel_dsi->ports) { /* Panel commands can be sent when clock is in LP11 */ I915_WRITE(MIPI_DEVICE_READY(port), 0x0); intel_dsi_reset_clocks(encoder, port); I915_WRITE(MIPI_EOT_DISABLE(port), CLOCKSTOP); val = I915_READ(MIPI_DSI_FUNC_PRG(port)); val &= ~VID_MODE_FORMAT_MASK; I915_WRITE(MIPI_DSI_FUNC_PRG(port), val); I915_WRITE(MIPI_DEVICE_READY(port), 0x1); } } } static int intel_dsi_get_modes(struct drm_connector *connector) { struct intel_connector *intel_connector = to_intel_connector(connector); struct drm_display_mode *mode; DRM_DEBUG_KMS("\n"); if (!intel_connector->panel.fixed_mode) { DRM_DEBUG_KMS("no fixed mode\n"); return 0; } mode = drm_mode_duplicate(connector->dev, intel_connector->panel.fixed_mode); if (!mode) { DRM_DEBUG_KMS("drm_mode_duplicate failed\n"); return 0; } drm_mode_probed_add(connector, mode); return 1; } static void intel_dsi_connector_destroy(struct drm_connector *connector) { struct intel_connector *intel_connector = to_intel_connector(connector); DRM_DEBUG_KMS("\n"); intel_panel_fini(&intel_connector->panel); drm_connector_cleanup(connector); kfree(connector); } static void intel_dsi_encoder_destroy(struct drm_encoder *encoder) { struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder); /* dispose of the gpios */ if (intel_dsi->gpio_panel) gpiod_put(intel_dsi->gpio_panel); intel_encoder_destroy(encoder); } static const struct drm_encoder_funcs intel_dsi_funcs = { .destroy = intel_dsi_encoder_destroy, }; static const struct drm_connector_helper_funcs intel_dsi_connector_helper_funcs = { .get_modes = intel_dsi_get_modes, .mode_valid = intel_dsi_mode_valid, .atomic_check = intel_digital_connector_atomic_check, }; static const struct drm_connector_funcs intel_dsi_connector_funcs = { .dpms = drm_atomic_helper_connector_dpms, .late_register = intel_connector_register, .early_unregister = intel_connector_unregister, .destroy = intel_dsi_connector_destroy, .fill_modes = drm_helper_probe_single_connector_modes, .set_property = drm_atomic_helper_connector_set_property, .atomic_get_property = intel_digital_connector_atomic_get_property, .atomic_set_property = intel_digital_connector_atomic_set_property, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, .atomic_duplicate_state = intel_digital_connector_duplicate_state, }; static void intel_dsi_add_properties(struct intel_connector *connector) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); if (connector->panel.fixed_mode) { u32 allowed_scalers; allowed_scalers = BIT(DRM_MODE_SCALE_ASPECT) | BIT(DRM_MODE_SCALE_FULLSCREEN); if (!HAS_GMCH_DISPLAY(dev_priv)) allowed_scalers |= BIT(DRM_MODE_SCALE_CENTER); drm_connector_attach_scaling_mode_property(&connector->base, allowed_scalers); connector->base.state->scaling_mode = DRM_MODE_SCALE_ASPECT; } } void intel_dsi_init(struct drm_i915_private *dev_priv) { struct drm_device *dev = &dev_priv->drm; struct intel_dsi *intel_dsi; struct intel_encoder *intel_encoder; struct drm_encoder *encoder; struct intel_connector *intel_connector; struct drm_connector *connector; struct drm_display_mode *scan, *fixed_mode = NULL; enum port port; DRM_DEBUG_KMS("\n"); /* There is no detection method for MIPI so rely on VBT */ if (!intel_bios_is_dsi_present(dev_priv, &port)) return; if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { dev_priv->mipi_mmio_base = VLV_MIPI_BASE; } else if (IS_GEN9_LP(dev_priv)) { dev_priv->mipi_mmio_base = BXT_MIPI_BASE; } else { DRM_ERROR("Unsupported Mipi device to reg base"); return; } intel_dsi = kzalloc(sizeof(*intel_dsi), GFP_KERNEL); if (!intel_dsi) return; intel_connector = intel_connector_alloc(); if (!intel_connector) { kfree(intel_dsi); return; } intel_encoder = &intel_dsi->base; encoder = &intel_encoder->base; intel_dsi->attached_connector = intel_connector; connector = &intel_connector->base; drm_encoder_init(dev, encoder, &intel_dsi_funcs, DRM_MODE_ENCODER_DSI, "DSI %c", port_name(port)); intel_encoder->compute_config = intel_dsi_compute_config; intel_encoder->pre_enable = intel_dsi_pre_enable; intel_encoder->enable = intel_dsi_enable_nop; intel_encoder->disable = intel_dsi_disable; intel_encoder->post_disable = intel_dsi_post_disable; intel_encoder->get_hw_state = intel_dsi_get_hw_state; intel_encoder->get_config = intel_dsi_get_config; intel_connector->get_hw_state = intel_connector_get_hw_state; intel_encoder->port = port; /* * On BYT/CHV, pipe A maps to MIPI DSI port A, pipe B maps to MIPI DSI * port C. BXT isn't limited like this. */ if (IS_GEN9_LP(dev_priv)) intel_encoder->crtc_mask = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C); else if (port == PORT_A) intel_encoder->crtc_mask = BIT(PIPE_A); else intel_encoder->crtc_mask = BIT(PIPE_B); if (dev_priv->vbt.dsi.config->dual_link) { intel_dsi->ports = BIT(PORT_A) | BIT(PORT_C); switch (dev_priv->vbt.dsi.config->dl_dcs_backlight_ports) { case DL_DCS_PORT_A: intel_dsi->dcs_backlight_ports = BIT(PORT_A); break; case DL_DCS_PORT_C: intel_dsi->dcs_backlight_ports = BIT(PORT_C); break; default: case DL_DCS_PORT_A_AND_C: intel_dsi->dcs_backlight_ports = BIT(PORT_A) | BIT(PORT_C); break; } switch (dev_priv->vbt.dsi.config->dl_dcs_cabc_ports) { case DL_DCS_PORT_A: intel_dsi->dcs_cabc_ports = BIT(PORT_A); break; case DL_DCS_PORT_C: intel_dsi->dcs_cabc_ports = BIT(PORT_C); break; default: case DL_DCS_PORT_A_AND_C: intel_dsi->dcs_cabc_ports = BIT(PORT_A) | BIT(PORT_C); break; } } else { intel_dsi->ports = BIT(port); intel_dsi->dcs_backlight_ports = BIT(port); intel_dsi->dcs_cabc_ports = BIT(port); } if (!dev_priv->vbt.dsi.config->cabc_supported) intel_dsi->dcs_cabc_ports = 0; /* Create a DSI host (and a device) for each port. */ for_each_dsi_port(port, intel_dsi->ports) { struct intel_dsi_host *host; host = intel_dsi_host_init(intel_dsi, port); if (!host) goto err; intel_dsi->dsi_hosts[port] = host; } if (!intel_dsi_vbt_init(intel_dsi, MIPI_DSI_GENERIC_PANEL_ID)) { DRM_DEBUG_KMS("no device found\n"); goto err; } /* * In case of BYT with CRC PMIC, we need to use GPIO for * Panel control. */ if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) && (dev_priv->vbt.dsi.config->pwm_blc == PPS_BLC_PMIC)) { intel_dsi->gpio_panel = gpiod_get(dev->dev, "panel", GPIOD_OUT_HIGH); if (IS_ERR(intel_dsi->gpio_panel)) { DRM_ERROR("Failed to own gpio for panel control\n"); intel_dsi->gpio_panel = NULL; } } intel_encoder->type = INTEL_OUTPUT_DSI; intel_encoder->power_domain = POWER_DOMAIN_PORT_DSI; intel_encoder->cloneable = 0; drm_connector_init(dev, connector, &intel_dsi_connector_funcs, DRM_MODE_CONNECTOR_DSI); drm_connector_helper_add(connector, &intel_dsi_connector_helper_funcs); connector->display_info.subpixel_order = SubPixelHorizontalRGB; /*XXX*/ connector->interlace_allowed = false; connector->doublescan_allowed = false; intel_connector_attach_encoder(intel_connector, intel_encoder); mutex_lock(&dev->mode_config.mutex); intel_dsi_vbt_get_modes(intel_dsi); list_for_each_entry(scan, &connector->probed_modes, head) { if ((scan->type & DRM_MODE_TYPE_PREFERRED)) { fixed_mode = drm_mode_duplicate(dev, scan); break; } } mutex_unlock(&dev->mode_config.mutex); if (!fixed_mode) { DRM_DEBUG_KMS("no fixed mode\n"); goto err; } connector->display_info.width_mm = fixed_mode->width_mm; connector->display_info.height_mm = fixed_mode->height_mm; intel_panel_init(&intel_connector->panel, fixed_mode, NULL); intel_panel_setup_backlight(connector, INVALID_PIPE); intel_dsi_add_properties(intel_connector); return; err: drm_encoder_cleanup(&intel_encoder->base); kfree(intel_dsi); kfree(intel_connector); }