diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dsi.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dsi.c | 620 |
1 files changed, 620 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c new file mode 100644 index 000000000000..d257b093ca68 --- /dev/null +++ b/drivers/gpu/drm/i915/intel_dsi.c @@ -0,0 +1,620 @@ +/* + * 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 <jani.nikula@intel.com> + */ + +#include <drm/drmP.h> +#include <drm/drm_crtc.h> +#include <drm/drm_edid.h> +#include <drm/i915_drm.h> +#include <linux/slab.h> +#include "i915_drv.h" +#include "intel_drv.h" +#include "intel_dsi.h" +#include "intel_dsi_cmd.h" + +/* the sub-encoders aka panel drivers */ +static const struct intel_dsi_device intel_dsi_devices[] = { +}; + + +static void vlv_cck_modify(struct drm_i915_private *dev_priv, u32 reg, u32 val, + u32 mask) +{ + u32 tmp = vlv_cck_read(dev_priv, reg); + tmp &= ~mask; + tmp |= val; + vlv_cck_write(dev_priv, reg, tmp); +} + +static void band_gap_wa(struct drm_i915_private *dev_priv) +{ + mutex_lock(&dev_priv->dpio_lock); + + /* Enable bandgap fix in GOP driver */ + vlv_cck_modify(dev_priv, 0x6D, 0x00010000, 0x00030000); + msleep(20); + vlv_cck_modify(dev_priv, 0x6E, 0x00010000, 0x00030000); + msleep(20); + vlv_cck_modify(dev_priv, 0x6F, 0x00010000, 0x00030000); + msleep(20); + vlv_cck_modify(dev_priv, 0x00, 0x00008000, 0x00008000); + msleep(20); + vlv_cck_modify(dev_priv, 0x00, 0x00000000, 0x00008000); + msleep(20); + + /* Turn Display Trunk on */ + vlv_cck_modify(dev_priv, 0x6B, 0x00020000, 0x00030000); + msleep(20); + + vlv_cck_modify(dev_priv, 0x6C, 0x00020000, 0x00030000); + msleep(20); + + vlv_cck_modify(dev_priv, 0x6D, 0x00020000, 0x00030000); + msleep(20); + vlv_cck_modify(dev_priv, 0x6E, 0x00020000, 0x00030000); + msleep(20); + vlv_cck_modify(dev_priv, 0x6F, 0x00020000, 0x00030000); + + mutex_unlock(&dev_priv->dpio_lock); + + /* Need huge delay, otherwise clock is not stable */ + msleep(100); +} + +static struct intel_dsi *intel_attached_dsi(struct drm_connector *connector) +{ + return container_of(intel_attached_encoder(connector), + struct intel_dsi, base); +} + +static inline bool is_vid_mode(struct intel_dsi *intel_dsi) +{ + return intel_dsi->dev.type == INTEL_DSI_VIDEO_MODE; +} + +static inline bool is_cmd_mode(struct intel_dsi *intel_dsi) +{ + return intel_dsi->dev.type == INTEL_DSI_COMMAND_MODE; +} + +static void intel_dsi_hot_plug(struct intel_encoder *encoder) +{ + DRM_DEBUG_KMS("\n"); +} + +static bool intel_dsi_compute_config(struct intel_encoder *encoder, + struct intel_crtc_config *config) +{ + struct intel_dsi *intel_dsi = container_of(encoder, struct intel_dsi, + base); + struct intel_connector *intel_connector = intel_dsi->attached_connector; + struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode; + struct drm_display_mode *adjusted_mode = &config->adjusted_mode; + struct drm_display_mode *mode = &config->requested_mode; + + DRM_DEBUG_KMS("\n"); + + if (fixed_mode) + intel_fixed_panel_mode(fixed_mode, adjusted_mode); + + if (intel_dsi->dev.dev_ops->mode_fixup) + return intel_dsi->dev.dev_ops->mode_fixup(&intel_dsi->dev, + mode, adjusted_mode); + + return true; +} + +static void intel_dsi_pre_pll_enable(struct intel_encoder *encoder) +{ + DRM_DEBUG_KMS("\n"); + + vlv_enable_dsi_pll(encoder); +} + +static void intel_dsi_pre_enable(struct intel_encoder *encoder) +{ + DRM_DEBUG_KMS("\n"); +} + +static void intel_dsi_enable(struct intel_encoder *encoder) +{ + struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; + struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); + struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); + int pipe = intel_crtc->pipe; + u32 temp; + + DRM_DEBUG_KMS("\n"); + + temp = I915_READ(MIPI_DEVICE_READY(pipe)); + if ((temp & DEVICE_READY) == 0) { + temp &= ~ULPS_STATE_MASK; + I915_WRITE(MIPI_DEVICE_READY(pipe), temp | DEVICE_READY); + } else if (temp & ULPS_STATE_MASK) { + temp &= ~ULPS_STATE_MASK; + I915_WRITE(MIPI_DEVICE_READY(pipe), temp | ULPS_STATE_EXIT); + /* + * We need to ensure that there is a minimum of 1 ms time + * available before clearing the UPLS exit state. + */ + msleep(2); + I915_WRITE(MIPI_DEVICE_READY(pipe), temp); + } + + if (is_cmd_mode(intel_dsi)) + I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(pipe), 8 * 4); + + if (is_vid_mode(intel_dsi)) { + msleep(20); /* XXX */ + dpi_send_cmd(intel_dsi, TURN_ON); + msleep(100); + + /* assert ip_tg_enable signal */ + temp = I915_READ(MIPI_PORT_CTRL(pipe)); + I915_WRITE(MIPI_PORT_CTRL(pipe), temp | DPI_ENABLE); + POSTING_READ(MIPI_PORT_CTRL(pipe)); + } + + intel_dsi->dev.dev_ops->enable(&intel_dsi->dev); +} + +static void intel_dsi_disable(struct intel_encoder *encoder) +{ + struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; + struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); + struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); + int pipe = intel_crtc->pipe; + u32 temp; + + DRM_DEBUG_KMS("\n"); + + intel_dsi->dev.dev_ops->disable(&intel_dsi->dev); + + if (is_vid_mode(intel_dsi)) { + dpi_send_cmd(intel_dsi, SHUTDOWN); + msleep(10); + + /* de-assert ip_tg_enable signal */ + temp = I915_READ(MIPI_PORT_CTRL(pipe)); + I915_WRITE(MIPI_PORT_CTRL(pipe), temp & ~DPI_ENABLE); + POSTING_READ(MIPI_PORT_CTRL(pipe)); + + msleep(2); + } + + temp = I915_READ(MIPI_DEVICE_READY(pipe)); + if (temp & DEVICE_READY) { + temp &= ~DEVICE_READY; + temp &= ~ULPS_STATE_MASK; + I915_WRITE(MIPI_DEVICE_READY(pipe), temp); + } +} + +static void intel_dsi_post_disable(struct intel_encoder *encoder) +{ + DRM_DEBUG_KMS("\n"); + + vlv_disable_dsi_pll(encoder); +} + +static bool intel_dsi_get_hw_state(struct intel_encoder *encoder, + enum pipe *pipe) +{ + struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; + u32 port, func; + enum pipe p; + + DRM_DEBUG_KMS("\n"); + + /* XXX: this only works for one DSI output */ + for (p = PIPE_A; p <= PIPE_B; p++) { + port = I915_READ(MIPI_PORT_CTRL(p)); + func = I915_READ(MIPI_DSI_FUNC_PRG(p)); + + if ((port & DPI_ENABLE) || (func & CMD_MODE_DATA_WIDTH_MASK)) { + if (I915_READ(MIPI_DEVICE_READY(p)) & DEVICE_READY) { + *pipe = p; + return true; + } + } + } + + return false; +} + +static void intel_dsi_get_config(struct intel_encoder *encoder, + struct intel_crtc_config *pipe_config) +{ + DRM_DEBUG_KMS("\n"); + + /* XXX: read flags, set to adjusted_mode */ +} + +static int intel_dsi_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct intel_connector *intel_connector = to_intel_connector(connector); + struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode; + struct intel_dsi *intel_dsi = intel_attached_dsi(connector); + + 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; + } + + return intel_dsi->dev.dev_ops->mode_valid(&intel_dsi->dev, mode); +} + +/* 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; + } +} + +/* return pixels in terms of txbyteclkhs */ +static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count) +{ + return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp, 8), lane_count); +} + +static void set_dsi_timings(struct drm_encoder *encoder, + const struct drm_display_mode *mode) +{ + struct drm_device *dev = encoder->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc); + struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder); + int pipe = intel_crtc->pipe; + unsigned int bpp = intel_crtc->config.pipe_bpp; + unsigned int lane_count = intel_dsi->lane_count; + + u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp; + + hactive = mode->hdisplay; + hfp = mode->hsync_start - mode->hdisplay; + hsync = mode->hsync_end - mode->hsync_start; + hbp = mode->htotal - mode->hsync_end; + + vfp = mode->vsync_start - mode->vdisplay; + vsync = mode->vsync_end - mode->vsync_start; + vbp = mode->vtotal - mode->vsync_end; + + /* horizontal values are in terms of high speed byte clock */ + hactive = txbyteclkhs(hactive, bpp, lane_count); + hfp = txbyteclkhs(hfp, bpp, lane_count); + hsync = txbyteclkhs(hsync, bpp, lane_count); + hbp = txbyteclkhs(hbp, bpp, lane_count); + + I915_WRITE(MIPI_HACTIVE_AREA_COUNT(pipe), hactive); + I915_WRITE(MIPI_HFP_COUNT(pipe), 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(pipe), hsync); + I915_WRITE(MIPI_HBP_COUNT(pipe), hbp); + + /* vertical values are in terms of lines */ + I915_WRITE(MIPI_VFP_COUNT(pipe), vfp); + I915_WRITE(MIPI_VSYNC_PADDING_COUNT(pipe), vsync); + I915_WRITE(MIPI_VBP_COUNT(pipe), vbp); +} + +static void intel_dsi_mode_set(struct intel_encoder *intel_encoder) +{ + struct drm_encoder *encoder = &intel_encoder->base; + struct drm_device *dev = encoder->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc); + struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder); + struct drm_display_mode *adjusted_mode = + &intel_crtc->config.adjusted_mode; + int pipe = intel_crtc->pipe; + unsigned int bpp = intel_crtc->config.pipe_bpp; + u32 val, tmp; + + DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe)); + + /* Update the DSI PLL */ + vlv_enable_dsi_pll(intel_encoder); + + /* XXX: Location of the call */ + band_gap_wa(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(0)); + tmp &= ~ESCAPE_CLOCK_DIVIDER_MASK; + I915_WRITE(MIPI_CTRL(0), tmp | ESCAPE_CLOCK_DIVIDER_1); + + /* read request priority is per pipe */ + tmp = I915_READ(MIPI_CTRL(pipe)); + tmp &= ~READ_REQUEST_PRIORITY_MASK; + I915_WRITE(MIPI_CTRL(pipe), tmp | READ_REQUEST_PRIORITY_HIGH); + + /* XXX: why here, why like this? handling in irq handler?! */ + I915_WRITE(MIPI_INTR_STAT(pipe), 0xffffffff); + I915_WRITE(MIPI_INTR_EN(pipe), 0xffffffff); + + I915_WRITE(MIPI_DPHY_PARAM(pipe), + 0x3c << EXIT_ZERO_COUNT_SHIFT | + 0x1f << TRAIL_COUNT_SHIFT | + 0xc5 << CLK_ZERO_COUNT_SHIFT | + 0x1f << PREPARE_COUNT_SHIFT); + + I915_WRITE(MIPI_DPI_RESOLUTION(pipe), + adjusted_mode->vdisplay << VERTICAL_ADDRESS_SHIFT | + adjusted_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; + + /* XXX: cross-check bpp vs. pixel format? */ + val |= intel_dsi->pixel_format; + } + I915_WRITE(MIPI_DSI_FUNC_PRG(pipe), 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(pipe), + txbyteclkhs(adjusted_mode->htotal, bpp, + intel_dsi->lane_count) + 1); + } else { + I915_WRITE(MIPI_HS_TX_TIMEOUT(pipe), + txbyteclkhs(adjusted_mode->vtotal * + adjusted_mode->htotal, + bpp, intel_dsi->lane_count) + 1); + } + I915_WRITE(MIPI_LP_RX_TIMEOUT(pipe), 8309); /* max */ + I915_WRITE(MIPI_TURN_AROUND_TIMEOUT(pipe), 0x14); /* max */ + I915_WRITE(MIPI_DEVICE_RESET_TIMER(pipe), 0xffff); /* max */ + + /* dphy stuff */ + + /* in terms of low power clock */ + I915_WRITE(MIPI_INIT_COUNT(pipe), txclkesc(ESCAPE_CLOCK_DIVIDER_1, 100)); + + /* recovery disables */ + I915_WRITE(MIPI_EOT_DISABLE(pipe), intel_dsi->eot_disable); + + /* 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(pipe), 0x46); + + /* 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(pipe), 4); + + /* 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(pipe), 0x820); + + I915_WRITE(MIPI_CLK_LANE_SWITCH_TIME_CNT(pipe), + 0xa << LP_HS_SSW_CNT_SHIFT | + 0x14 << HS_LP_PWR_SW_CNT_SHIFT); + + if (is_vid_mode(intel_dsi)) + I915_WRITE(MIPI_VIDEO_MODE_FORMAT(pipe), + intel_dsi->video_mode_format); +} + +static enum drm_connector_status +intel_dsi_detect(struct drm_connector *connector, bool force) +{ + struct intel_dsi *intel_dsi = intel_attached_dsi(connector); + DRM_DEBUG_KMS("\n"); + return intel_dsi->dev.dev_ops->detect(&intel_dsi->dev); +} + +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_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 const struct drm_encoder_funcs intel_dsi_funcs = { + .destroy = intel_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, + .best_encoder = intel_best_encoder, +}; + +static const struct drm_connector_funcs intel_dsi_connector_funcs = { + .dpms = intel_connector_dpms, + .detect = intel_dsi_detect, + .destroy = intel_dsi_destroy, + .fill_modes = drm_helper_probe_single_connector_modes, +}; + +bool intel_dsi_init(struct drm_device *dev) +{ + 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 *fixed_mode = NULL; + const struct intel_dsi_device *dsi; + unsigned int i; + + DRM_DEBUG_KMS("\n"); + + intel_dsi = kzalloc(sizeof(*intel_dsi), GFP_KERNEL); + if (!intel_dsi) + return false; + + intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL); + if (!intel_connector) { + kfree(intel_dsi); + return false; + } + + 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); + + /* XXX: very likely not all of these are needed */ + intel_encoder->hot_plug = intel_dsi_hot_plug; + intel_encoder->compute_config = intel_dsi_compute_config; + intel_encoder->pre_pll_enable = intel_dsi_pre_pll_enable; + intel_encoder->pre_enable = intel_dsi_pre_enable; + intel_encoder->enable = intel_dsi_enable; + intel_encoder->mode_set = intel_dsi_mode_set; + 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; + + for (i = 0; i < ARRAY_SIZE(intel_dsi_devices); i++) { + dsi = &intel_dsi_devices[i]; + intel_dsi->dev = *dsi; + + if (dsi->dev_ops->init(&intel_dsi->dev)) + break; + } + + if (i == ARRAY_SIZE(intel_dsi_devices)) { + DRM_DEBUG_KMS("no device found\n"); + goto err; + } + + intel_encoder->type = INTEL_OUTPUT_DSI; + intel_encoder->crtc_mask = (1 << 0); /* XXX */ + + intel_encoder->cloneable = false; + 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); + + drm_sysfs_connector_add(connector); + + fixed_mode = dsi->dev_ops->get_modes(&intel_dsi->dev); + if (!fixed_mode) { + DRM_DEBUG_KMS("no fixed mode\n"); + goto err; + } + + fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; + intel_panel_init(&intel_connector->panel, fixed_mode); + + return true; + +err: + drm_encoder_cleanup(&intel_encoder->base); + kfree(intel_dsi); + kfree(intel_connector); + + return false; +} |