Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1011 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_lvds.c b/drivers/gpu/drm/i915/display/intel_lvds.c
new file mode 100644
index 000000000..dcb07d9a7
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_lvds.c
@@ -0,0 +1,1011 @@
+/*
+ * Copyright © 2006-2007 Intel Corporation
+ * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
+ *
+ * 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.
+ *
+ * Authors:
+ *	Eric Anholt <eric@anholt.net>
+ *      Dave Airlie <airlied@linux.ie>
+ *      Jesse Barnes <jesse.barnes@intel.com>
+ */
+
+#include <acpi/button.h>
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/vga_switcheroo.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+
+#include "i915_drv.h"
+#include "i915_reg.h"
+#include "intel_atomic.h"
+#include "intel_backlight.h"
+#include "intel_connector.h"
+#include "intel_de.h"
+#include "intel_display_types.h"
+#include "intel_dpll.h"
+#include "intel_fdi.h"
+#include "intel_gmbus.h"
+#include "intel_lvds.h"
+#include "intel_lvds_regs.h"
+#include "intel_panel.h"
+#include "intel_pps_regs.h"
+
+/* Private structure for the integrated LVDS support */
+struct intel_lvds_pps {
+	/* 100us units */
+	int t1_t2;
+	int t3;
+	int t4;
+	int t5;
+	int tx;
+
+	int divider;
+
+	int port;
+	bool powerdown_on_reset;
+};
+
+struct intel_lvds_encoder {
+	struct intel_encoder base;
+
+	bool is_dual_link;
+	i915_reg_t reg;
+	u32 a3_power;
+
+	struct intel_lvds_pps init_pps;
+	u32 init_lvds_val;
+
+	struct intel_connector *attached_connector;
+};
+
+static struct intel_lvds_encoder *to_lvds_encoder(struct intel_encoder *encoder)
+{
+	return container_of(encoder, struct intel_lvds_encoder, base);
+}
+
+bool intel_lvds_port_enabled(struct drm_i915_private *i915,
+			     i915_reg_t lvds_reg, enum pipe *pipe)
+{
+	u32 val;
+
+	val = intel_de_read(i915, lvds_reg);
+
+	/* asserts want to know the pipe even if the port is disabled */
+	if (HAS_PCH_CPT(i915))
+		*pipe = REG_FIELD_GET(LVDS_PIPE_SEL_MASK_CPT, val);
+	else
+		*pipe = REG_FIELD_GET(LVDS_PIPE_SEL_MASK, val);
+
+	return val & LVDS_PORT_EN;
+}
+
+static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
+				    enum pipe *pipe)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
+	intel_wakeref_t wakeref;
+	bool ret;
+
+	wakeref = intel_display_power_get_if_enabled(i915, encoder->power_domain);
+	if (!wakeref)
+		return false;
+
+	ret = intel_lvds_port_enabled(i915, lvds_encoder->reg, pipe);
+
+	intel_display_power_put(i915, encoder->power_domain, wakeref);
+
+	return ret;
+}
+
+static void intel_lvds_get_config(struct intel_encoder *encoder,
+				  struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
+	u32 tmp, flags = 0;
+
+	crtc_state->output_types |= BIT(INTEL_OUTPUT_LVDS);
+
+	tmp = intel_de_read(dev_priv, lvds_encoder->reg);
+	if (tmp & LVDS_HSYNC_POLARITY)
+		flags |= DRM_MODE_FLAG_NHSYNC;
+	else
+		flags |= DRM_MODE_FLAG_PHSYNC;
+	if (tmp & LVDS_VSYNC_POLARITY)
+		flags |= DRM_MODE_FLAG_NVSYNC;
+	else
+		flags |= DRM_MODE_FLAG_PVSYNC;
+
+	crtc_state->hw.adjusted_mode.flags |= flags;
+
+	if (DISPLAY_VER(dev_priv) < 5)
+		crtc_state->gmch_pfit.lvds_border_bits =
+			tmp & LVDS_BORDER_ENABLE;
+
+	/* gen2/3 store dither state in pfit control, needs to match */
+	if (DISPLAY_VER(dev_priv) < 4) {
+		tmp = intel_de_read(dev_priv, PFIT_CONTROL);
+
+		crtc_state->gmch_pfit.control |= tmp & PFIT_PANEL_8TO6_DITHER_ENABLE;
+	}
+
+	crtc_state->hw.adjusted_mode.crtc_clock = crtc_state->port_clock;
+}
+
+static void intel_lvds_pps_get_hw_state(struct drm_i915_private *dev_priv,
+					struct intel_lvds_pps *pps)
+{
+	u32 val;
+
+	pps->powerdown_on_reset = intel_de_read(dev_priv, PP_CONTROL(0)) & PANEL_POWER_RESET;
+
+	val = intel_de_read(dev_priv, PP_ON_DELAYS(0));
+	pps->port = REG_FIELD_GET(PANEL_PORT_SELECT_MASK, val);
+	pps->t1_t2 = REG_FIELD_GET(PANEL_POWER_UP_DELAY_MASK, val);
+	pps->t5 = REG_FIELD_GET(PANEL_LIGHT_ON_DELAY_MASK, val);
+
+	val = intel_de_read(dev_priv, PP_OFF_DELAYS(0));
+	pps->t3 = REG_FIELD_GET(PANEL_POWER_DOWN_DELAY_MASK, val);
+	pps->tx = REG_FIELD_GET(PANEL_LIGHT_OFF_DELAY_MASK, val);
+
+	val = intel_de_read(dev_priv, PP_DIVISOR(0));
+	pps->divider = REG_FIELD_GET(PP_REFERENCE_DIVIDER_MASK, val);
+	val = REG_FIELD_GET(PANEL_POWER_CYCLE_DELAY_MASK, val);
+	/*
+	 * Remove the BSpec specified +1 (100ms) offset that accounts for a
+	 * too short power-cycle delay due to the asynchronous programming of
+	 * the register.
+	 */
+	if (val)
+		val--;
+	/* Convert from 100ms to 100us units */
+	pps->t4 = val * 1000;
+
+	if (DISPLAY_VER(dev_priv) <= 4 &&
+	    pps->t1_t2 == 0 && pps->t5 == 0 && pps->t3 == 0 && pps->tx == 0) {
+		drm_dbg_kms(&dev_priv->drm,
+			    "Panel power timings uninitialized, "
+			    "setting defaults\n");
+		/* Set T2 to 40ms and T5 to 200ms in 100 usec units */
+		pps->t1_t2 = 40 * 10;
+		pps->t5 = 200 * 10;
+		/* Set T3 to 35ms and Tx to 200ms in 100 usec units */
+		pps->t3 = 35 * 10;
+		pps->tx = 200 * 10;
+	}
+
+	drm_dbg(&dev_priv->drm, "LVDS PPS:t1+t2 %d t3 %d t4 %d t5 %d tx %d "
+		"divider %d port %d powerdown_on_reset %d\n",
+		pps->t1_t2, pps->t3, pps->t4, pps->t5, pps->tx,
+		pps->divider, pps->port, pps->powerdown_on_reset);
+}
+
+static void intel_lvds_pps_init_hw(struct drm_i915_private *dev_priv,
+				   struct intel_lvds_pps *pps)
+{
+	u32 val;
+
+	val = intel_de_read(dev_priv, PP_CONTROL(0));
+	drm_WARN_ON(&dev_priv->drm,
+		    (val & PANEL_UNLOCK_MASK) != PANEL_UNLOCK_REGS);
+	if (pps->powerdown_on_reset)
+		val |= PANEL_POWER_RESET;
+	intel_de_write(dev_priv, PP_CONTROL(0), val);
+
+	intel_de_write(dev_priv, PP_ON_DELAYS(0),
+		       REG_FIELD_PREP(PANEL_PORT_SELECT_MASK, pps->port) |
+		       REG_FIELD_PREP(PANEL_POWER_UP_DELAY_MASK, pps->t1_t2) |
+		       REG_FIELD_PREP(PANEL_LIGHT_ON_DELAY_MASK, pps->t5));
+
+	intel_de_write(dev_priv, PP_OFF_DELAYS(0),
+		       REG_FIELD_PREP(PANEL_POWER_DOWN_DELAY_MASK, pps->t3) |
+		       REG_FIELD_PREP(PANEL_LIGHT_OFF_DELAY_MASK, pps->tx));
+
+	intel_de_write(dev_priv, PP_DIVISOR(0),
+		       REG_FIELD_PREP(PP_REFERENCE_DIVIDER_MASK, pps->divider) |
+		       REG_FIELD_PREP(PANEL_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(pps->t4, 1000) + 1));
+}
+
+static void intel_pre_enable_lvds(struct intel_atomic_state *state,
+				  struct intel_encoder *encoder,
+				  const struct intel_crtc_state *crtc_state,
+				  const struct drm_connector_state *conn_state)
+{
+	struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
+	enum pipe pipe = crtc->pipe;
+	u32 temp;
+
+	if (HAS_PCH_SPLIT(i915)) {
+		assert_fdi_rx_pll_disabled(i915, pipe);
+		assert_shared_dpll_disabled(i915, crtc_state->shared_dpll);
+	} else {
+		assert_pll_disabled(i915, pipe);
+	}
+
+	intel_lvds_pps_init_hw(i915, &lvds_encoder->init_pps);
+
+	temp = lvds_encoder->init_lvds_val;
+	temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
+
+	if (HAS_PCH_CPT(i915)) {
+		temp &= ~LVDS_PIPE_SEL_MASK_CPT;
+		temp |= LVDS_PIPE_SEL_CPT(pipe);
+	} else {
+		temp &= ~LVDS_PIPE_SEL_MASK;
+		temp |= LVDS_PIPE_SEL(pipe);
+	}
+
+	/* set the corresponsding LVDS_BORDER bit */
+	temp &= ~LVDS_BORDER_ENABLE;
+	temp |= crtc_state->gmch_pfit.lvds_border_bits;
+
+	/*
+	 * Set the B0-B3 data pairs corresponding to whether we're going to
+	 * set the DPLLs for dual-channel mode or not.
+	 */
+	if (lvds_encoder->is_dual_link)
+		temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
+	else
+		temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
+
+	/*
+	 * It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
+	 * appropriately here, but we need to look more thoroughly into how
+	 * panels behave in the two modes. For now, let's just maintain the
+	 * value we got from the BIOS.
+	 */
+	temp &= ~LVDS_A3_POWER_MASK;
+	temp |= lvds_encoder->a3_power;
+
+	/*
+	 * Set the dithering flag on LVDS as needed, note that there is no
+	 * special lvds dither control bit on pch-split platforms, dithering is
+	 * only controlled through the TRANSCONF reg.
+	 */
+	if (DISPLAY_VER(i915) == 4) {
+		/*
+		 * Bspec wording suggests that LVDS port dithering only exists
+		 * for 18bpp panels.
+		 */
+		if (crtc_state->dither && crtc_state->pipe_bpp == 18)
+			temp |= LVDS_ENABLE_DITHER;
+		else
+			temp &= ~LVDS_ENABLE_DITHER;
+	}
+	temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
+	if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
+		temp |= LVDS_HSYNC_POLARITY;
+	if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
+		temp |= LVDS_VSYNC_POLARITY;
+
+	intel_de_write(i915, lvds_encoder->reg, temp);
+}
+
+/*
+ * Sets the power state for the panel.
+ */
+static void intel_enable_lvds(struct intel_atomic_state *state,
+			      struct intel_encoder *encoder,
+			      const struct intel_crtc_state *crtc_state,
+			      const struct drm_connector_state *conn_state)
+{
+	struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+
+	intel_de_rmw(dev_priv, lvds_encoder->reg, 0, LVDS_PORT_EN);
+
+	intel_de_rmw(dev_priv, PP_CONTROL(0), 0, PANEL_POWER_ON);
+	intel_de_posting_read(dev_priv, lvds_encoder->reg);
+
+	if (intel_de_wait_for_set(dev_priv, PP_STATUS(0), PP_ON, 5000))
+		drm_err(&dev_priv->drm,
+			"timed out waiting for panel to power on\n");
+
+	intel_backlight_enable(crtc_state, conn_state);
+}
+
+static void intel_disable_lvds(struct intel_atomic_state *state,
+			       struct intel_encoder *encoder,
+			       const struct intel_crtc_state *old_crtc_state,
+			       const struct drm_connector_state *old_conn_state)
+{
+	struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+
+	intel_de_rmw(dev_priv, PP_CONTROL(0), PANEL_POWER_ON, 0);
+	if (intel_de_wait_for_clear(dev_priv, PP_STATUS(0), PP_ON, 1000))
+		drm_err(&dev_priv->drm,
+			"timed out waiting for panel to power off\n");
+
+	intel_de_rmw(dev_priv, lvds_encoder->reg, LVDS_PORT_EN, 0);
+	intel_de_posting_read(dev_priv, lvds_encoder->reg);
+}
+
+static void gmch_disable_lvds(struct intel_atomic_state *state,
+			      struct intel_encoder *encoder,
+			      const struct intel_crtc_state *old_crtc_state,
+			      const struct drm_connector_state *old_conn_state)
+
+{
+	intel_backlight_disable(old_conn_state);
+
+	intel_disable_lvds(state, encoder, old_crtc_state, old_conn_state);
+}
+
+static void pch_disable_lvds(struct intel_atomic_state *state,
+			     struct intel_encoder *encoder,
+			     const struct intel_crtc_state *old_crtc_state,
+			     const struct drm_connector_state *old_conn_state)
+{
+	intel_backlight_disable(old_conn_state);
+}
+
+static void pch_post_disable_lvds(struct intel_atomic_state *state,
+				  struct intel_encoder *encoder,
+				  const struct intel_crtc_state *old_crtc_state,
+				  const struct drm_connector_state *old_conn_state)
+{
+	intel_disable_lvds(state, encoder, old_crtc_state, old_conn_state);
+}
+
+static void intel_lvds_shutdown(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+
+	if (intel_de_wait_for_clear(dev_priv, PP_STATUS(0), PP_CYCLE_DELAY_ACTIVE, 5000))
+		drm_err(&dev_priv->drm,
+			"timed out waiting for panel power cycle delay\n");
+}
+
+static enum drm_mode_status
+intel_lvds_mode_valid(struct drm_connector *_connector,
+		      struct drm_display_mode *mode)
+{
+	struct intel_connector *connector = to_intel_connector(_connector);
+	struct drm_i915_private *i915 = to_i915(connector->base.dev);
+	const struct drm_display_mode *fixed_mode =
+		intel_panel_fixed_mode(connector, mode);
+	int max_pixclk = to_i915(connector->base.dev)->max_dotclk_freq;
+	enum drm_mode_status status;
+
+	status = intel_cpu_transcoder_mode_valid(i915, mode);
+	if (status != MODE_OK)
+		return status;
+
+	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
+		return MODE_NO_DBLESCAN;
+
+	status = intel_panel_mode_valid(connector, mode);
+	if (status != MODE_OK)
+		return status;
+
+	if (fixed_mode->clock > max_pixclk)
+		return MODE_CLOCK_HIGH;
+
+	return MODE_OK;
+}
+
+static int intel_lvds_compute_config(struct intel_encoder *encoder,
+				     struct intel_crtc_state *crtc_state,
+				     struct drm_connector_state *conn_state)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
+	struct intel_connector *connector = lvds_encoder->attached_connector;
+	struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	unsigned int lvds_bpp;
+	int ret;
+
+	/* Should never happen!! */
+	if (DISPLAY_VER(i915) < 4 && crtc->pipe == 0) {
+		drm_err(&i915->drm, "Can't support LVDS on pipe A\n");
+		return -EINVAL;
+	}
+
+	if (lvds_encoder->a3_power == LVDS_A3_POWER_UP)
+		lvds_bpp = 8*3;
+	else
+		lvds_bpp = 6*3;
+
+	if (lvds_bpp != crtc_state->pipe_bpp && !crtc_state->bw_constrained) {
+		drm_dbg_kms(&i915->drm,
+			    "forcing display bpp (was %d) to LVDS (%d)\n",
+			    crtc_state->pipe_bpp, lvds_bpp);
+		crtc_state->pipe_bpp = lvds_bpp;
+	}
+
+	crtc_state->sink_format = INTEL_OUTPUT_FORMAT_RGB;
+	crtc_state->output_format = INTEL_OUTPUT_FORMAT_RGB;
+
+	/*
+	 * We have timings from the BIOS for the panel, put them in
+	 * to the adjusted mode.  The CRTC will be set up for this mode,
+	 * with the panel scaling set up to source from the H/VDisplay
+	 * of the original mode.
+	 */
+	ret = intel_panel_compute_config(connector, adjusted_mode);
+	if (ret)
+		return ret;
+
+	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
+		return -EINVAL;
+
+	if (HAS_PCH_SPLIT(i915))
+		crtc_state->has_pch_encoder = true;
+
+	ret = intel_panel_fitting(crtc_state, conn_state);
+	if (ret)
+		return ret;
+
+	/*
+	 * XXX: It would be nice to support lower refresh rates on the
+	 * panels to reduce power consumption, and perhaps match the
+	 * user's requested refresh rate.
+	 */
+
+	return 0;
+}
+
+/*
+ * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
+ */
+static int intel_lvds_get_modes(struct drm_connector *_connector)
+{
+	struct intel_connector *connector = to_intel_connector(_connector);
+	const struct drm_edid *fixed_edid = connector->panel.fixed_edid;
+
+	/* Use panel fixed edid if we have one */
+	if (!IS_ERR_OR_NULL(fixed_edid)) {
+		drm_edid_connector_update(&connector->base, fixed_edid);
+
+		return drm_edid_connector_add_modes(&connector->base);
+	}
+
+	return intel_panel_get_modes(connector);
+}
+
+static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
+	.get_modes = intel_lvds_get_modes,
+	.mode_valid = intel_lvds_mode_valid,
+	.atomic_check = intel_digital_connector_atomic_check,
+};
+
+static const struct drm_connector_funcs intel_lvds_connector_funcs = {
+	.detect = intel_panel_detect,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.atomic_get_property = intel_digital_connector_atomic_get_property,
+	.atomic_set_property = intel_digital_connector_atomic_set_property,
+	.late_register = intel_connector_register,
+	.early_unregister = intel_connector_unregister,
+	.destroy = intel_connector_destroy,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+	.atomic_duplicate_state = intel_digital_connector_duplicate_state,
+};
+
+static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
+	.destroy = intel_encoder_destroy,
+};
+
+static int intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
+{
+	DRM_INFO("Skipping LVDS initialization for %s\n", id->ident);
+	return 1;
+}
+
+/* These systems claim to have LVDS, but really don't */
+static const struct dmi_system_id intel_no_lvds[] = {
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Apple Mac Mini (Core series)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Apple Mac Mini (Core 2 series)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "MSI IM-945GSE-A",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Dell Studio Hybrid",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Dell OptiPlex FX170",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "AOpen Mini PC",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "AOpen Mini PC MP915",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
+			DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "AOpen i915GMm-HFS",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
+			DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "AOpen i45GMx-I",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
+			DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Aopen i945GTt-VFA",
+		.matches = {
+			DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Clientron U800",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Clientron E830",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Asus EeeBox PC EB1007",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Asus AT5NM10T-I",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+			DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Hewlett-Packard HP t5740",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+			DMI_MATCH(DMI_PRODUCT_NAME, " t5740"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Hewlett-Packard t5745",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Hewlett-Packard st5747",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "MSI Wind Box DC500",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
+			DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Gigabyte GA-D525TUD",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
+			DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Supermicro X7SPA-H",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "X7SPA-H"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Fujitsu Esprimo Q900",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Q900"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Intel D410PT",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
+			DMI_MATCH(DMI_BOARD_NAME, "D410PT"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Intel D425KT",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
+			DMI_EXACT_MATCH(DMI_BOARD_NAME, "D425KT"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Intel D510MO",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
+			DMI_EXACT_MATCH(DMI_BOARD_NAME, "D510MO"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Intel D525MW",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
+			DMI_EXACT_MATCH(DMI_BOARD_NAME, "D525MW"),
+		},
+	},
+	{
+		.callback = intel_no_lvds_dmi_callback,
+		.ident = "Radiant P845",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Radiant Systems Inc"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "P845"),
+		},
+	},
+
+	{ }	/* terminating entry */
+};
+
+static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
+{
+	DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident);
+	return 1;
+}
+
+static const struct dmi_system_id intel_dual_link_lvds[] = {
+	{
+		.callback = intel_dual_link_lvds_callback,
+		.ident = "Apple MacBook Pro 15\" (2010)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro6,2"),
+		},
+	},
+	{
+		.callback = intel_dual_link_lvds_callback,
+		.ident = "Apple MacBook Pro 15\" (2011)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),
+		},
+	},
+	{
+		.callback = intel_dual_link_lvds_callback,
+		.ident = "Apple MacBook Pro 15\" (2012)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro9,1"),
+		},
+	},
+	{ }	/* terminating entry */
+};
+
+struct intel_encoder *intel_get_lvds_encoder(struct drm_i915_private *i915)
+{
+	struct intel_encoder *encoder;
+
+	for_each_intel_encoder(&i915->drm, encoder) {
+		if (encoder->type == INTEL_OUTPUT_LVDS)
+			return encoder;
+	}
+
+	return NULL;
+}
+
+bool intel_is_dual_link_lvds(struct drm_i915_private *i915)
+{
+	struct intel_encoder *encoder = intel_get_lvds_encoder(i915);
+
+	return encoder && to_lvds_encoder(encoder)->is_dual_link;
+}
+
+static bool compute_is_dual_link_lvds(struct intel_lvds_encoder *lvds_encoder)
+{
+	struct drm_i915_private *i915 = to_i915(lvds_encoder->base.base.dev);
+	struct intel_connector *connector = lvds_encoder->attached_connector;
+	const struct drm_display_mode *fixed_mode =
+		intel_panel_preferred_fixed_mode(connector);
+	unsigned int val;
+
+	/* use the module option value if specified */
+	if (i915->params.lvds_channel_mode > 0)
+		return i915->params.lvds_channel_mode == 2;
+
+	/* single channel LVDS is limited to 112 MHz */
+	if (fixed_mode->clock > 112999)
+		return true;
+
+	if (dmi_check_system(intel_dual_link_lvds))
+		return true;
+
+	/*
+	 * BIOS should set the proper LVDS register value at boot, but
+	 * in reality, it doesn't set the value when the lid is closed;
+	 * we need to check "the value to be set" in VBT when LVDS
+	 * register is uninitialized.
+	 */
+	val = intel_de_read(i915, lvds_encoder->reg);
+	if (HAS_PCH_CPT(i915))
+		val &= ~(LVDS_DETECTED | LVDS_PIPE_SEL_MASK_CPT);
+	else
+		val &= ~(LVDS_DETECTED | LVDS_PIPE_SEL_MASK);
+	if (val == 0)
+		val = connector->panel.vbt.bios_lvds_val;
+
+	return (val & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP;
+}
+
+static void intel_lvds_add_properties(struct drm_connector *connector)
+{
+	intel_attach_scaling_mode_property(connector);
+}
+
+/**
+ * intel_lvds_init - setup LVDS connectors on this device
+ * @i915: i915 device
+ *
+ * Create the connector, register the LVDS DDC bus, and try to figure out what
+ * modes we can display on the LVDS panel (if present).
+ */
+void intel_lvds_init(struct drm_i915_private *i915)
+{
+	struct intel_lvds_encoder *lvds_encoder;
+	struct intel_connector *connector;
+	const struct drm_edid *drm_edid;
+	struct intel_encoder *encoder;
+	i915_reg_t lvds_reg;
+	u32 lvds;
+	u8 pin;
+
+	/* Skip init on machines we know falsely report LVDS */
+	if (dmi_check_system(intel_no_lvds)) {
+		drm_WARN(&i915->drm, !i915->display.vbt.int_lvds_support,
+			 "Useless DMI match. Internal LVDS support disabled by VBT\n");
+		return;
+	}
+
+	if (!i915->display.vbt.int_lvds_support) {
+		drm_dbg_kms(&i915->drm,
+			    "Internal LVDS support disabled by VBT\n");
+		return;
+	}
+
+	if (HAS_PCH_SPLIT(i915))
+		lvds_reg = PCH_LVDS;
+	else
+		lvds_reg = LVDS;
+
+	lvds = intel_de_read(i915, lvds_reg);
+
+	if (HAS_PCH_SPLIT(i915)) {
+		if ((lvds & LVDS_DETECTED) == 0)
+			return;
+	}
+
+	pin = GMBUS_PIN_PANEL;
+	if (!intel_bios_is_lvds_present(i915, &pin)) {
+		if ((lvds & LVDS_PORT_EN) == 0) {
+			drm_dbg_kms(&i915->drm,
+				    "LVDS is not present in VBT\n");
+			return;
+		}
+		drm_dbg_kms(&i915->drm,
+			    "LVDS is not present in VBT, but enabled anyway\n");
+	}
+
+	lvds_encoder = kzalloc(sizeof(*lvds_encoder), GFP_KERNEL);
+	if (!lvds_encoder)
+		return;
+
+	connector = intel_connector_alloc();
+	if (!connector) {
+		kfree(lvds_encoder);
+		return;
+	}
+
+	lvds_encoder->attached_connector = connector;
+	encoder = &lvds_encoder->base;
+
+	drm_connector_init(&i915->drm, &connector->base, &intel_lvds_connector_funcs,
+			   DRM_MODE_CONNECTOR_LVDS);
+
+	drm_encoder_init(&i915->drm, &encoder->base, &intel_lvds_enc_funcs,
+			 DRM_MODE_ENCODER_LVDS, "LVDS");
+
+	encoder->enable = intel_enable_lvds;
+	encoder->pre_enable = intel_pre_enable_lvds;
+	encoder->compute_config = intel_lvds_compute_config;
+	if (HAS_PCH_SPLIT(i915)) {
+		encoder->disable = pch_disable_lvds;
+		encoder->post_disable = pch_post_disable_lvds;
+	} else {
+		encoder->disable = gmch_disable_lvds;
+	}
+	encoder->get_hw_state = intel_lvds_get_hw_state;
+	encoder->get_config = intel_lvds_get_config;
+	encoder->update_pipe = intel_backlight_update;
+	encoder->shutdown = intel_lvds_shutdown;
+	connector->get_hw_state = intel_connector_get_hw_state;
+
+	intel_connector_attach_encoder(connector, encoder);
+
+	encoder->type = INTEL_OUTPUT_LVDS;
+	encoder->power_domain = POWER_DOMAIN_PORT_OTHER;
+	encoder->port = PORT_NONE;
+	encoder->cloneable = 0;
+	if (DISPLAY_VER(i915) < 4)
+		encoder->pipe_mask = BIT(PIPE_B);
+	else
+		encoder->pipe_mask = ~0;
+
+	drm_connector_helper_add(&connector->base, &intel_lvds_connector_helper_funcs);
+	connector->base.display_info.subpixel_order = SubPixelHorizontalRGB;
+
+	lvds_encoder->reg = lvds_reg;
+
+	intel_lvds_add_properties(&connector->base);
+
+	intel_lvds_pps_get_hw_state(i915, &lvds_encoder->init_pps);
+	lvds_encoder->init_lvds_val = lvds;
+
+	/*
+	 * LVDS discovery:
+	 * 1) check for EDID on DDC
+	 * 2) check for VBT data
+	 * 3) check to see if LVDS is already on
+	 *    if none of the above, no panel
+	 */
+
+	/*
+	 * Attempt to get the fixed panel mode from DDC.  Assume that the
+	 * preferred mode is the right one.
+	 */
+	mutex_lock(&i915->drm.mode_config.mutex);
+	if (vga_switcheroo_handler_flags() & VGA_SWITCHEROO_CAN_SWITCH_DDC) {
+		drm_edid = drm_edid_read_switcheroo(&connector->base,
+						    intel_gmbus_get_adapter(i915, pin));
+	} else {
+		drm_edid = drm_edid_read_ddc(&connector->base,
+					     intel_gmbus_get_adapter(i915, pin));
+	}
+	if (drm_edid) {
+		if (drm_edid_connector_update(&connector->base, drm_edid) ||
+		    !drm_edid_connector_add_modes(&connector->base)) {
+			drm_edid_connector_update(&connector->base, NULL);
+			drm_edid_free(drm_edid);
+			drm_edid = ERR_PTR(-EINVAL);
+		}
+	} else {
+		drm_edid = ERR_PTR(-ENOENT);
+	}
+	intel_bios_init_panel_late(i915, &connector->panel, NULL,
+				   IS_ERR(drm_edid) ? NULL : drm_edid);
+
+	/* Try EDID first */
+	intel_panel_add_edid_fixed_modes(connector, true);
+
+	/* Failed to get EDID, what about VBT? */
+	if (!intel_panel_preferred_fixed_mode(connector))
+		intel_panel_add_vbt_lfp_fixed_mode(connector);
+
+	/*
+	 * If we didn't get a fixed mode from EDID or VBT, try checking
+	 * if the panel is already turned on.  If so, assume that
+	 * whatever is currently programmed is the correct mode.
+	 */
+	if (!intel_panel_preferred_fixed_mode(connector))
+		intel_panel_add_encoder_fixed_mode(connector, encoder);
+
+	mutex_unlock(&i915->drm.mode_config.mutex);
+
+	/* If we still don't have a mode after all that, give up. */
+	if (!intel_panel_preferred_fixed_mode(connector))
+		goto failed;
+
+	intel_panel_init(connector, drm_edid);
+
+	intel_backlight_setup(connector, INVALID_PIPE);
+
+	lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
+	drm_dbg_kms(&i915->drm, "detected %s-link lvds configuration\n",
+		    lvds_encoder->is_dual_link ? "dual" : "single");
+
+	lvds_encoder->a3_power = lvds & LVDS_A3_POWER_MASK;
+
+	return;
+
+failed:
+	drm_dbg_kms(&i915->drm, "No LVDS modes found, disabling.\n");
+	drm_connector_cleanup(&connector->base);
+	drm_encoder_cleanup(&encoder->base);
+	kfree(lvds_encoder);
+	intel_connector_free(connector);
+	return;
+}