Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 765 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
new file mode 100644
index 0000000000..9232a305b1
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_panel.c
@@ -0,0 +1,765 @@
+/*
+ * Copyright © 2006-2010 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>
+ *      Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include <linux/kernel.h>
+#include <linux/pwm.h>
+
+#include <drm/drm_edid.h>
+
+#include "i915_reg.h"
+#include "intel_backlight.h"
+#include "intel_connector.h"
+#include "intel_de.h"
+#include "intel_display_types.h"
+#include "intel_drrs.h"
+#include "intel_lvds_regs.h"
+#include "intel_panel.h"
+#include "intel_quirks.h"
+#include "intel_vrr.h"
+
+bool intel_panel_use_ssc(struct drm_i915_private *i915)
+{
+	if (i915->params.panel_use_ssc >= 0)
+		return i915->params.panel_use_ssc != 0;
+	return i915->display.vbt.lvds_use_ssc &&
+		!intel_has_quirk(i915, QUIRK_LVDS_SSC_DISABLE);
+}
+
+const struct drm_display_mode *
+intel_panel_preferred_fixed_mode(struct intel_connector *connector)
+{
+	return list_first_entry_or_null(&connector->panel.fixed_modes,
+					struct drm_display_mode, head);
+}
+
+static bool is_in_vrr_range(struct intel_connector *connector, int vrefresh)
+{
+	const struct drm_display_info *info = &connector->base.display_info;
+
+	return intel_vrr_is_capable(connector) &&
+		vrefresh >= info->monitor_range.min_vfreq &&
+		vrefresh <= info->monitor_range.max_vfreq;
+}
+
+static bool is_best_fixed_mode(struct intel_connector *connector,
+			       int vrefresh, int fixed_mode_vrefresh,
+			       const struct drm_display_mode *best_mode)
+{
+	/* we want to always return something */
+	if (!best_mode)
+		return true;
+
+	/*
+	 * With VRR always pick a mode with equal/higher than requested
+	 * vrefresh, which we can then reduce to match the requested
+	 * vrefresh by extending the vblank length.
+	 */
+	if (is_in_vrr_range(connector, vrefresh) &&
+	    is_in_vrr_range(connector, fixed_mode_vrefresh) &&
+	    fixed_mode_vrefresh < vrefresh)
+		return false;
+
+	/* pick the fixed_mode that is closest in terms of vrefresh */
+	return abs(fixed_mode_vrefresh - vrefresh) <
+		abs(drm_mode_vrefresh(best_mode) - vrefresh);
+}
+
+const struct drm_display_mode *
+intel_panel_fixed_mode(struct intel_connector *connector,
+		       const struct drm_display_mode *mode)
+{
+	const struct drm_display_mode *fixed_mode, *best_mode = NULL;
+	int vrefresh = drm_mode_vrefresh(mode);
+
+	list_for_each_entry(fixed_mode, &connector->panel.fixed_modes, head) {
+		int fixed_mode_vrefresh = drm_mode_vrefresh(fixed_mode);
+
+		if (is_best_fixed_mode(connector, vrefresh,
+				       fixed_mode_vrefresh, best_mode))
+			best_mode = fixed_mode;
+	}
+
+	return best_mode;
+}
+
+static bool is_alt_drrs_mode(const struct drm_display_mode *mode,
+			     const struct drm_display_mode *preferred_mode)
+{
+	return drm_mode_match(mode, preferred_mode,
+			      DRM_MODE_MATCH_TIMINGS |
+			      DRM_MODE_MATCH_FLAGS |
+			      DRM_MODE_MATCH_3D_FLAGS) &&
+		mode->clock != preferred_mode->clock;
+}
+
+static bool is_alt_fixed_mode(const struct drm_display_mode *mode,
+			      const struct drm_display_mode *preferred_mode)
+{
+	u32 sync_flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NHSYNC |
+		DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_NVSYNC;
+
+	return (mode->flags & ~sync_flags) == (preferred_mode->flags & ~sync_flags) &&
+		mode->hdisplay == preferred_mode->hdisplay &&
+		mode->vdisplay == preferred_mode->vdisplay;
+}
+
+const struct drm_display_mode *
+intel_panel_downclock_mode(struct intel_connector *connector,
+			   const struct drm_display_mode *adjusted_mode)
+{
+	const struct drm_display_mode *fixed_mode, *best_mode = NULL;
+	int min_vrefresh = connector->panel.vbt.seamless_drrs_min_refresh_rate;
+	int max_vrefresh = drm_mode_vrefresh(adjusted_mode);
+
+	/* pick the fixed_mode with the lowest refresh rate */
+	list_for_each_entry(fixed_mode, &connector->panel.fixed_modes, head) {
+		int vrefresh = drm_mode_vrefresh(fixed_mode);
+
+		if (is_alt_drrs_mode(fixed_mode, adjusted_mode) &&
+		    vrefresh >= min_vrefresh && vrefresh < max_vrefresh) {
+			max_vrefresh = vrefresh;
+			best_mode = fixed_mode;
+		}
+	}
+
+	return best_mode;
+}
+
+const struct drm_display_mode *
+intel_panel_highest_mode(struct intel_connector *connector,
+			 const struct drm_display_mode *adjusted_mode)
+{
+	const struct drm_display_mode *fixed_mode, *best_mode = adjusted_mode;
+
+	/* pick the fixed_mode that has the highest clock */
+	list_for_each_entry(fixed_mode, &connector->panel.fixed_modes, head) {
+		if (fixed_mode->clock > best_mode->clock)
+			best_mode = fixed_mode;
+	}
+
+	return best_mode;
+}
+
+int intel_panel_get_modes(struct intel_connector *connector)
+{
+	const struct drm_display_mode *fixed_mode;
+	int num_modes = 0;
+
+	list_for_each_entry(fixed_mode, &connector->panel.fixed_modes, head) {
+		struct drm_display_mode *mode;
+
+		mode = drm_mode_duplicate(connector->base.dev, fixed_mode);
+		if (mode) {
+			drm_mode_probed_add(&connector->base, mode);
+			num_modes++;
+		}
+	}
+
+	return num_modes;
+}
+
+static bool has_drrs_modes(struct intel_connector *connector)
+{
+	const struct drm_display_mode *mode1;
+
+	list_for_each_entry(mode1, &connector->panel.fixed_modes, head) {
+		const struct drm_display_mode *mode2 = mode1;
+
+		list_for_each_entry_continue(mode2, &connector->panel.fixed_modes, head) {
+			if (is_alt_drrs_mode(mode1, mode2))
+				return true;
+		}
+	}
+
+	return false;
+}
+
+enum drrs_type intel_panel_drrs_type(struct intel_connector *connector)
+{
+	return connector->panel.vbt.drrs_type;
+}
+
+int intel_panel_compute_config(struct intel_connector *connector,
+			       struct drm_display_mode *adjusted_mode)
+{
+	const struct drm_display_mode *fixed_mode =
+		intel_panel_fixed_mode(connector, adjusted_mode);
+	int vrefresh, fixed_mode_vrefresh;
+	bool is_vrr;
+
+	if (!fixed_mode)
+		return 0;
+
+	vrefresh = drm_mode_vrefresh(adjusted_mode);
+	fixed_mode_vrefresh = drm_mode_vrefresh(fixed_mode);
+
+	/*
+	 * Assume that we shouldn't muck about with the
+	 * timings if they don't land in the VRR range.
+	 */
+	is_vrr = is_in_vrr_range(connector, vrefresh) &&
+		is_in_vrr_range(connector, fixed_mode_vrefresh);
+
+	if (!is_vrr) {
+		/*
+		 * We don't want to lie too much to the user about the refresh
+		 * rate they're going to get. But we have to allow a bit of latitude
+		 * for Xorg since it likes to automagically cook up modes with slightly
+		 * off refresh rates.
+		 */
+		if (abs(vrefresh - fixed_mode_vrefresh) > 1) {
+			drm_dbg_kms(connector->base.dev,
+				    "[CONNECTOR:%d:%s] Requested mode vrefresh (%d Hz) does not match fixed mode vrefresh (%d Hz)\n",
+				    connector->base.base.id, connector->base.name,
+				    vrefresh, fixed_mode_vrefresh);
+
+			return -EINVAL;
+		}
+	}
+
+	drm_mode_copy(adjusted_mode, fixed_mode);
+
+	if (is_vrr && fixed_mode_vrefresh != vrefresh)
+		adjusted_mode->vtotal =
+			DIV_ROUND_CLOSEST(adjusted_mode->clock * 1000,
+					  adjusted_mode->htotal * vrefresh);
+
+	drm_mode_set_crtcinfo(adjusted_mode, 0);
+
+	return 0;
+}
+
+static void intel_panel_add_edid_alt_fixed_modes(struct intel_connector *connector)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	const struct drm_display_mode *preferred_mode =
+		intel_panel_preferred_fixed_mode(connector);
+	struct drm_display_mode *mode, *next;
+
+	list_for_each_entry_safe(mode, next, &connector->base.probed_modes, head) {
+		if (!is_alt_fixed_mode(mode, preferred_mode))
+			continue;
+
+		drm_dbg_kms(&dev_priv->drm,
+			    "[CONNECTOR:%d:%s] using alternate EDID fixed mode: " DRM_MODE_FMT "\n",
+			    connector->base.base.id, connector->base.name,
+			    DRM_MODE_ARG(mode));
+
+		list_move_tail(&mode->head, &connector->panel.fixed_modes);
+	}
+}
+
+static void intel_panel_add_edid_preferred_mode(struct intel_connector *connector)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	struct drm_display_mode *scan, *fixed_mode = NULL;
+
+	if (list_empty(&connector->base.probed_modes))
+		return;
+
+	/* make sure the preferred mode is first */
+	list_for_each_entry(scan, &connector->base.probed_modes, head) {
+		if (scan->type & DRM_MODE_TYPE_PREFERRED) {
+			fixed_mode = scan;
+			break;
+		}
+	}
+
+	if (!fixed_mode)
+		fixed_mode = list_first_entry(&connector->base.probed_modes,
+					      typeof(*fixed_mode), head);
+
+	drm_dbg_kms(&dev_priv->drm,
+		    "[CONNECTOR:%d:%s] using %s EDID fixed mode: " DRM_MODE_FMT "\n",
+		    connector->base.base.id, connector->base.name,
+		    fixed_mode->type & DRM_MODE_TYPE_PREFERRED ? "preferred" : "first",
+		    DRM_MODE_ARG(fixed_mode));
+
+	fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
+
+	list_move_tail(&fixed_mode->head, &connector->panel.fixed_modes);
+}
+
+static void intel_panel_destroy_probed_modes(struct intel_connector *connector)
+{
+	struct drm_i915_private *i915 = to_i915(connector->base.dev);
+	struct drm_display_mode *mode, *next;
+
+	list_for_each_entry_safe(mode, next, &connector->base.probed_modes, head) {
+		drm_dbg_kms(&i915->drm,
+			    "[CONNECTOR:%d:%s] not using EDID mode: " DRM_MODE_FMT "\n",
+			    connector->base.base.id, connector->base.name,
+			    DRM_MODE_ARG(mode));
+		list_del(&mode->head);
+		drm_mode_destroy(&i915->drm, mode);
+	}
+}
+
+void intel_panel_add_edid_fixed_modes(struct intel_connector *connector,
+				      bool use_alt_fixed_modes)
+{
+	intel_panel_add_edid_preferred_mode(connector);
+	if (intel_panel_preferred_fixed_mode(connector) && use_alt_fixed_modes)
+		intel_panel_add_edid_alt_fixed_modes(connector);
+	intel_panel_destroy_probed_modes(connector);
+}
+
+static void intel_panel_add_fixed_mode(struct intel_connector *connector,
+				       struct drm_display_mode *fixed_mode,
+				       const char *type)
+{
+	struct drm_i915_private *i915 = to_i915(connector->base.dev);
+	struct drm_display_info *info = &connector->base.display_info;
+
+	if (!fixed_mode)
+		return;
+
+	fixed_mode->type |= DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
+
+	info->width_mm = fixed_mode->width_mm;
+	info->height_mm = fixed_mode->height_mm;
+
+	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] using %s fixed mode: " DRM_MODE_FMT "\n",
+		    connector->base.base.id, connector->base.name, type,
+		    DRM_MODE_ARG(fixed_mode));
+
+	list_add_tail(&fixed_mode->head, &connector->panel.fixed_modes);
+}
+
+void intel_panel_add_vbt_lfp_fixed_mode(struct intel_connector *connector)
+{
+	struct drm_i915_private *i915 = to_i915(connector->base.dev);
+	const struct drm_display_mode *mode;
+
+	mode = connector->panel.vbt.lfp_lvds_vbt_mode;
+	if (!mode)
+		return;
+
+	intel_panel_add_fixed_mode(connector,
+				   drm_mode_duplicate(&i915->drm, mode),
+				   "VBT LFP");
+}
+
+void intel_panel_add_vbt_sdvo_fixed_mode(struct intel_connector *connector)
+{
+	struct drm_i915_private *i915 = to_i915(connector->base.dev);
+	const struct drm_display_mode *mode;
+
+	mode = connector->panel.vbt.sdvo_lvds_vbt_mode;
+	if (!mode)
+		return;
+
+	intel_panel_add_fixed_mode(connector,
+				   drm_mode_duplicate(&i915->drm, mode),
+				   "VBT SDVO");
+}
+
+void intel_panel_add_encoder_fixed_mode(struct intel_connector *connector,
+					struct intel_encoder *encoder)
+{
+	intel_panel_add_fixed_mode(connector,
+				   intel_encoder_current_mode(encoder),
+				   "current (BIOS)");
+}
+
+/* adjusted_mode has been preset to be the panel's fixed mode */
+static int pch_panel_fitting(struct intel_crtc_state *crtc_state,
+			     const struct drm_connector_state *conn_state)
+{
+	const struct drm_display_mode *adjusted_mode =
+		&crtc_state->hw.adjusted_mode;
+	int pipe_src_w = drm_rect_width(&crtc_state->pipe_src);
+	int pipe_src_h = drm_rect_height(&crtc_state->pipe_src);
+	int x, y, width, height;
+
+	/* Native modes don't need fitting */
+	if (adjusted_mode->crtc_hdisplay == pipe_src_w &&
+	    adjusted_mode->crtc_vdisplay == pipe_src_h &&
+	    crtc_state->output_format != INTEL_OUTPUT_FORMAT_YCBCR420)
+		return 0;
+
+	switch (conn_state->scaling_mode) {
+	case DRM_MODE_SCALE_CENTER:
+		width = pipe_src_w;
+		height = pipe_src_h;
+		x = (adjusted_mode->crtc_hdisplay - width + 1)/2;
+		y = (adjusted_mode->crtc_vdisplay - height + 1)/2;
+		break;
+
+	case DRM_MODE_SCALE_ASPECT:
+		/* Scale but preserve the aspect ratio */
+		{
+			u32 scaled_width = adjusted_mode->crtc_hdisplay * pipe_src_h;
+			u32 scaled_height = pipe_src_w * adjusted_mode->crtc_vdisplay;
+			if (scaled_width > scaled_height) { /* pillar */
+				width = scaled_height / pipe_src_h;
+				if (width & 1)
+					width++;
+				x = (adjusted_mode->crtc_hdisplay - width + 1) / 2;
+				y = 0;
+				height = adjusted_mode->crtc_vdisplay;
+			} else if (scaled_width < scaled_height) { /* letter */
+				height = scaled_width / pipe_src_w;
+				if (height & 1)
+				    height++;
+				y = (adjusted_mode->crtc_vdisplay - height + 1) / 2;
+				x = 0;
+				width = adjusted_mode->crtc_hdisplay;
+			} else {
+				x = y = 0;
+				width = adjusted_mode->crtc_hdisplay;
+				height = adjusted_mode->crtc_vdisplay;
+			}
+		}
+		break;
+
+	case DRM_MODE_SCALE_NONE:
+		WARN_ON(adjusted_mode->crtc_hdisplay != pipe_src_w);
+		WARN_ON(adjusted_mode->crtc_vdisplay != pipe_src_h);
+		fallthrough;
+	case DRM_MODE_SCALE_FULLSCREEN:
+		x = y = 0;
+		width = adjusted_mode->crtc_hdisplay;
+		height = adjusted_mode->crtc_vdisplay;
+		break;
+
+	default:
+		MISSING_CASE(conn_state->scaling_mode);
+		return -EINVAL;
+	}
+
+	drm_rect_init(&crtc_state->pch_pfit.dst,
+		      x, y, width, height);
+	crtc_state->pch_pfit.enabled = true;
+
+	return 0;
+}
+
+static void
+centre_horizontally(struct drm_display_mode *adjusted_mode,
+		    int width)
+{
+	u32 border, sync_pos, blank_width, sync_width;
+
+	/* keep the hsync and hblank widths constant */
+	sync_width = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start;
+	blank_width = adjusted_mode->crtc_hblank_end - adjusted_mode->crtc_hblank_start;
+	sync_pos = (blank_width - sync_width + 1) / 2;
+
+	border = (adjusted_mode->crtc_hdisplay - width + 1) / 2;
+	border += border & 1; /* make the border even */
+
+	adjusted_mode->crtc_hdisplay = width;
+	adjusted_mode->crtc_hblank_start = width + border;
+	adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_hblank_start + blank_width;
+
+	adjusted_mode->crtc_hsync_start = adjusted_mode->crtc_hblank_start + sync_pos;
+	adjusted_mode->crtc_hsync_end = adjusted_mode->crtc_hsync_start + sync_width;
+}
+
+static void
+centre_vertically(struct drm_display_mode *adjusted_mode,
+		  int height)
+{
+	u32 border, sync_pos, blank_width, sync_width;
+
+	/* keep the vsync and vblank widths constant */
+	sync_width = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start;
+	blank_width = adjusted_mode->crtc_vblank_end - adjusted_mode->crtc_vblank_start;
+	sync_pos = (blank_width - sync_width + 1) / 2;
+
+	border = (adjusted_mode->crtc_vdisplay - height + 1) / 2;
+
+	adjusted_mode->crtc_vdisplay = height;
+	adjusted_mode->crtc_vblank_start = height + border;
+	adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vblank_start + blank_width;
+
+	adjusted_mode->crtc_vsync_start = adjusted_mode->crtc_vblank_start + sync_pos;
+	adjusted_mode->crtc_vsync_end = adjusted_mode->crtc_vsync_start + sync_width;
+}
+
+static u32 panel_fitter_scaling(u32 source, u32 target)
+{
+	/*
+	 * Floating point operation is not supported. So the FACTOR
+	 * is defined, which can avoid the floating point computation
+	 * when calculating the panel ratio.
+	 */
+#define ACCURACY 12
+#define FACTOR (1 << ACCURACY)
+	u32 ratio = source * FACTOR / target;
+	return (FACTOR * ratio + FACTOR/2) / FACTOR;
+}
+
+static void i965_scale_aspect(struct intel_crtc_state *crtc_state,
+			      u32 *pfit_control)
+{
+	const struct drm_display_mode *adjusted_mode =
+		&crtc_state->hw.adjusted_mode;
+	int pipe_src_w = drm_rect_width(&crtc_state->pipe_src);
+	int pipe_src_h = drm_rect_height(&crtc_state->pipe_src);
+	u32 scaled_width = adjusted_mode->crtc_hdisplay * pipe_src_h;
+	u32 scaled_height = pipe_src_w * adjusted_mode->crtc_vdisplay;
+
+	/* 965+ is easy, it does everything in hw */
+	if (scaled_width > scaled_height)
+		*pfit_control |= PFIT_ENABLE |
+			PFIT_SCALING_PILLAR;
+	else if (scaled_width < scaled_height)
+		*pfit_control |= PFIT_ENABLE |
+			PFIT_SCALING_LETTER;
+	else if (adjusted_mode->crtc_hdisplay != pipe_src_w)
+		*pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
+}
+
+static void i9xx_scale_aspect(struct intel_crtc_state *crtc_state,
+			      u32 *pfit_control, u32 *pfit_pgm_ratios,
+			      u32 *border)
+{
+	struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
+	int pipe_src_w = drm_rect_width(&crtc_state->pipe_src);
+	int pipe_src_h = drm_rect_height(&crtc_state->pipe_src);
+	u32 scaled_width = adjusted_mode->crtc_hdisplay * pipe_src_h;
+	u32 scaled_height = pipe_src_w * adjusted_mode->crtc_vdisplay;
+	u32 bits;
+
+	/*
+	 * For earlier chips we have to calculate the scaling
+	 * ratio by hand and program it into the
+	 * PFIT_PGM_RATIO register
+	 */
+	if (scaled_width > scaled_height) { /* pillar */
+		centre_horizontally(adjusted_mode,
+				    scaled_height / pipe_src_h);
+
+		*border = LVDS_BORDER_ENABLE;
+		if (pipe_src_h != adjusted_mode->crtc_vdisplay) {
+			bits = panel_fitter_scaling(pipe_src_h,
+						    adjusted_mode->crtc_vdisplay);
+
+			*pfit_pgm_ratios |= (PFIT_HORIZ_SCALE(bits) |
+					     PFIT_VERT_SCALE(bits));
+			*pfit_control |= (PFIT_ENABLE |
+					  PFIT_VERT_INTERP_BILINEAR |
+					  PFIT_HORIZ_INTERP_BILINEAR);
+		}
+	} else if (scaled_width < scaled_height) { /* letter */
+		centre_vertically(adjusted_mode,
+				  scaled_width / pipe_src_w);
+
+		*border = LVDS_BORDER_ENABLE;
+		if (pipe_src_w != adjusted_mode->crtc_hdisplay) {
+			bits = panel_fitter_scaling(pipe_src_w,
+						    adjusted_mode->crtc_hdisplay);
+
+			*pfit_pgm_ratios |= (PFIT_HORIZ_SCALE(bits) |
+					     PFIT_VERT_SCALE(bits));
+			*pfit_control |= (PFIT_ENABLE |
+					  PFIT_VERT_INTERP_BILINEAR |
+					  PFIT_HORIZ_INTERP_BILINEAR);
+		}
+	} else {
+		/* Aspects match, Let hw scale both directions */
+		*pfit_control |= (PFIT_ENABLE |
+				  PFIT_VERT_AUTO_SCALE |
+				  PFIT_HORIZ_AUTO_SCALE |
+				  PFIT_VERT_INTERP_BILINEAR |
+				  PFIT_HORIZ_INTERP_BILINEAR);
+	}
+}
+
+static int gmch_panel_fitting(struct intel_crtc_state *crtc_state,
+			      const struct drm_connector_state *conn_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
+	struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
+	int pipe_src_w = drm_rect_width(&crtc_state->pipe_src);
+	int pipe_src_h = drm_rect_height(&crtc_state->pipe_src);
+
+	/* Native modes don't need fitting */
+	if (adjusted_mode->crtc_hdisplay == pipe_src_w &&
+	    adjusted_mode->crtc_vdisplay == pipe_src_h)
+		goto out;
+
+	switch (conn_state->scaling_mode) {
+	case DRM_MODE_SCALE_CENTER:
+		/*
+		 * For centered modes, we have to calculate border widths &
+		 * heights and modify the values programmed into the CRTC.
+		 */
+		centre_horizontally(adjusted_mode, pipe_src_w);
+		centre_vertically(adjusted_mode, pipe_src_h);
+		border = LVDS_BORDER_ENABLE;
+		break;
+	case DRM_MODE_SCALE_ASPECT:
+		/* Scale but preserve the aspect ratio */
+		if (DISPLAY_VER(dev_priv) >= 4)
+			i965_scale_aspect(crtc_state, &pfit_control);
+		else
+			i9xx_scale_aspect(crtc_state, &pfit_control,
+					  &pfit_pgm_ratios, &border);
+		break;
+	case DRM_MODE_SCALE_FULLSCREEN:
+		/*
+		 * Full scaling, even if it changes the aspect ratio.
+		 * Fortunately this is all done for us in hw.
+		 */
+		if (pipe_src_h != adjusted_mode->crtc_vdisplay ||
+		    pipe_src_w != adjusted_mode->crtc_hdisplay) {
+			pfit_control |= PFIT_ENABLE;
+			if (DISPLAY_VER(dev_priv) >= 4)
+				pfit_control |= PFIT_SCALING_AUTO;
+			else
+				pfit_control |= (PFIT_VERT_AUTO_SCALE |
+						 PFIT_VERT_INTERP_BILINEAR |
+						 PFIT_HORIZ_AUTO_SCALE |
+						 PFIT_HORIZ_INTERP_BILINEAR);
+		}
+		break;
+	default:
+		MISSING_CASE(conn_state->scaling_mode);
+		return -EINVAL;
+	}
+
+	/* 965+ wants fuzzy fitting */
+	/* FIXME: handle multiple panels by failing gracefully */
+	if (DISPLAY_VER(dev_priv) >= 4)
+		pfit_control |= PFIT_PIPE(crtc->pipe) | PFIT_FILTER_FUZZY;
+
+out:
+	if ((pfit_control & PFIT_ENABLE) == 0) {
+		pfit_control = 0;
+		pfit_pgm_ratios = 0;
+	}
+
+	/* Make sure pre-965 set dither correctly for 18bpp panels. */
+	if (DISPLAY_VER(dev_priv) < 4 && crtc_state->pipe_bpp == 18)
+		pfit_control |= PFIT_PANEL_8TO6_DITHER_ENABLE;
+
+	crtc_state->gmch_pfit.control = pfit_control;
+	crtc_state->gmch_pfit.pgm_ratios = pfit_pgm_ratios;
+	crtc_state->gmch_pfit.lvds_border_bits = border;
+
+	return 0;
+}
+
+int intel_panel_fitting(struct intel_crtc_state *crtc_state,
+			const struct drm_connector_state *conn_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+
+	if (HAS_GMCH(i915))
+		return gmch_panel_fitting(crtc_state, conn_state);
+	else
+		return pch_panel_fitting(crtc_state, conn_state);
+}
+
+enum drm_connector_status
+intel_panel_detect(struct drm_connector *connector, bool force)
+{
+	struct drm_i915_private *i915 = to_i915(connector->dev);
+
+	if (!INTEL_DISPLAY_ENABLED(i915))
+		return connector_status_disconnected;
+
+	return connector_status_connected;
+}
+
+enum drm_mode_status
+intel_panel_mode_valid(struct intel_connector *connector,
+		       const struct drm_display_mode *mode)
+{
+	const struct drm_display_mode *fixed_mode =
+		intel_panel_fixed_mode(connector, mode);
+
+	if (!fixed_mode)
+		return MODE_OK;
+
+	if (mode->hdisplay != fixed_mode->hdisplay)
+		return MODE_PANEL;
+
+	if (mode->vdisplay != fixed_mode->vdisplay)
+		return MODE_PANEL;
+
+	if (drm_mode_vrefresh(mode) != drm_mode_vrefresh(fixed_mode))
+		return MODE_PANEL;
+
+	return MODE_OK;
+}
+
+void intel_panel_init_alloc(struct intel_connector *connector)
+{
+	struct intel_panel *panel = &connector->panel;
+
+	connector->panel.vbt.panel_type = -1;
+	connector->panel.vbt.backlight.controller = -1;
+	INIT_LIST_HEAD(&panel->fixed_modes);
+}
+
+int intel_panel_init(struct intel_connector *connector,
+		     const struct drm_edid *fixed_edid)
+{
+	struct intel_panel *panel = &connector->panel;
+
+	panel->fixed_edid = fixed_edid;
+
+	intel_backlight_init_funcs(panel);
+
+	if (!has_drrs_modes(connector))
+		connector->panel.vbt.drrs_type = DRRS_TYPE_NONE;
+
+	drm_dbg_kms(connector->base.dev,
+		    "[CONNECTOR:%d:%s] DRRS type: %s\n",
+		    connector->base.base.id, connector->base.name,
+		    intel_drrs_type_str(intel_panel_drrs_type(connector)));
+
+	return 0;
+}
+
+void intel_panel_fini(struct intel_connector *connector)
+{
+	struct intel_panel *panel = &connector->panel;
+	struct drm_display_mode *fixed_mode, *next;
+
+	if (!IS_ERR_OR_NULL(panel->fixed_edid))
+		drm_edid_free(panel->fixed_edid);
+
+	intel_backlight_destroy(panel);
+
+	intel_bios_fini_panel(panel);
+
+	list_for_each_entry_safe(fixed_mode, next, &panel->fixed_modes, head) {
+		list_del(&fixed_mode->head);
+		drm_mode_destroy(connector->base.dev, fixed_mode);
+	}
+}