v4.19.13 snapshot.
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
new file mode 100644
index 0000000..02db9ac
--- /dev/null
+++ b/drivers/gpu/drm/drm_modes.c
@@ -0,0 +1,1813 @@
+/*
+ * Copyright © 1997-2003 by The XFree86 Project, Inc.
+ * Copyright © 2007 Dave Airlie
+ * Copyright © 2007-2008 Intel Corporation
+ * Jesse Barnes <jesse.barnes@intel.com>
+ * Copyright 2005-2006 Luc Verhaegen
+ * Copyright (c) 2001, Andy Ritger aritger@nvidia.com
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Except as contained in this notice, the name of the copyright holder(s)
+ * and author(s) shall not be used in advertising or otherwise to promote
+ * the sale, use or other dealings in this Software without prior written
+ * authorization from the copyright holder(s) and author(s).
+ */
+
+#include <linux/list.h>
+#include <linux/list_sort.h>
+#include <linux/export.h>
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <video/of_videomode.h>
+#include <video/videomode.h>
+#include <drm/drm_modes.h>
+
+#include "drm_crtc_internal.h"
+
+/**
+ * drm_mode_debug_printmodeline - print a mode to dmesg
+ * @mode: mode to print
+ *
+ * Describe @mode using DRM_DEBUG.
+ */
+void drm_mode_debug_printmodeline(const struct drm_display_mode *mode)
+{
+ DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
+}
+EXPORT_SYMBOL(drm_mode_debug_printmodeline);
+
+/**
+ * drm_mode_create - create a new display mode
+ * @dev: DRM device
+ *
+ * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it
+ * and return it.
+ *
+ * Returns:
+ * Pointer to new mode on success, NULL on error.
+ */
+struct drm_display_mode *drm_mode_create(struct drm_device *dev)
+{
+ struct drm_display_mode *nmode;
+
+ nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL);
+ if (!nmode)
+ return NULL;
+
+ if (drm_mode_object_add(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) {
+ kfree(nmode);
+ return NULL;
+ }
+
+ return nmode;
+}
+EXPORT_SYMBOL(drm_mode_create);
+
+/**
+ * drm_mode_destroy - remove a mode
+ * @dev: DRM device
+ * @mode: mode to remove
+ *
+ * Release @mode's unique ID, then free it @mode structure itself using kfree.
+ */
+void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
+{
+ if (!mode)
+ return;
+
+ drm_mode_object_unregister(dev, &mode->base);
+
+ kfree(mode);
+}
+EXPORT_SYMBOL(drm_mode_destroy);
+
+/**
+ * drm_mode_probed_add - add a mode to a connector's probed_mode list
+ * @connector: connector the new mode
+ * @mode: mode data
+ *
+ * Add @mode to @connector's probed_mode list for later use. This list should
+ * then in a second step get filtered and all the modes actually supported by
+ * the hardware moved to the @connector's modes list.
+ */
+void drm_mode_probed_add(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
+
+ list_add_tail(&mode->head, &connector->probed_modes);
+}
+EXPORT_SYMBOL(drm_mode_probed_add);
+
+/**
+ * drm_cvt_mode -create a modeline based on the CVT algorithm
+ * @dev: drm device
+ * @hdisplay: hdisplay size
+ * @vdisplay: vdisplay size
+ * @vrefresh: vrefresh rate
+ * @reduced: whether to use reduced blanking
+ * @interlaced: whether to compute an interlaced mode
+ * @margins: whether to add margins (borders)
+ *
+ * This function is called to generate the modeline based on CVT algorithm
+ * according to the hdisplay, vdisplay, vrefresh.
+ * It is based from the VESA(TM) Coordinated Video Timing Generator by
+ * Graham Loveridge April 9, 2003 available at
+ * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
+ *
+ * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c.
+ * What I have done is to translate it by using integer calculation.
+ *
+ * Returns:
+ * The modeline based on the CVT algorithm stored in a drm_display_mode object.
+ * The display mode object is allocated with drm_mode_create(). Returns NULL
+ * when no mode could be allocated.
+ */
+struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay,
+ int vdisplay, int vrefresh,
+ bool reduced, bool interlaced, bool margins)
+{
+#define HV_FACTOR 1000
+ /* 1) top/bottom margin size (% of height) - default: 1.8, */
+#define CVT_MARGIN_PERCENTAGE 18
+ /* 2) character cell horizontal granularity (pixels) - default 8 */
+#define CVT_H_GRANULARITY 8
+ /* 3) Minimum vertical porch (lines) - default 3 */
+#define CVT_MIN_V_PORCH 3
+ /* 4) Minimum number of vertical back porch lines - default 6 */
+#define CVT_MIN_V_BPORCH 6
+ /* Pixel Clock step (kHz) */
+#define CVT_CLOCK_STEP 250
+ struct drm_display_mode *drm_mode;
+ unsigned int vfieldrate, hperiod;
+ int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync;
+ int interlace;
+ u64 tmp;
+
+ /* allocate the drm_display_mode structure. If failure, we will
+ * return directly
+ */
+ drm_mode = drm_mode_create(dev);
+ if (!drm_mode)
+ return NULL;
+
+ /* the CVT default refresh rate is 60Hz */
+ if (!vrefresh)
+ vrefresh = 60;
+
+ /* the required field fresh rate */
+ if (interlaced)
+ vfieldrate = vrefresh * 2;
+ else
+ vfieldrate = vrefresh;
+
+ /* horizontal pixels */
+ hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY);
+
+ /* determine the left&right borders */
+ hmargin = 0;
+ if (margins) {
+ hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
+ hmargin -= hmargin % CVT_H_GRANULARITY;
+ }
+ /* find the total active pixels */
+ drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin;
+
+ /* find the number of lines per field */
+ if (interlaced)
+ vdisplay_rnd = vdisplay / 2;
+ else
+ vdisplay_rnd = vdisplay;
+
+ /* find the top & bottom borders */
+ vmargin = 0;
+ if (margins)
+ vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
+
+ drm_mode->vdisplay = vdisplay + 2 * vmargin;
+
+ /* Interlaced */
+ if (interlaced)
+ interlace = 1;
+ else
+ interlace = 0;
+
+ /* Determine VSync Width from aspect ratio */
+ if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay))
+ vsync = 4;
+ else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay))
+ vsync = 5;
+ else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay))
+ vsync = 6;
+ else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay))
+ vsync = 7;
+ else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay))
+ vsync = 7;
+ else /* custom */
+ vsync = 10;
+
+ if (!reduced) {
+ /* simplify the GTF calculation */
+ /* 4) Minimum time of vertical sync + back porch interval (µs)
+ * default 550.0
+ */
+ int tmp1, tmp2;
+#define CVT_MIN_VSYNC_BP 550
+ /* 3) Nominal HSync width (% of line period) - default 8 */
+#define CVT_HSYNC_PERCENTAGE 8
+ unsigned int hblank_percentage;
+ int vsyncandback_porch, vback_porch, hblank;
+
+ /* estimated the horizontal period */
+ tmp1 = HV_FACTOR * 1000000 -
+ CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate;
+ tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 +
+ interlace;
+ hperiod = tmp1 * 2 / (tmp2 * vfieldrate);
+
+ tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1;
+ /* 9. Find number of lines in sync + backporch */
+ if (tmp1 < (vsync + CVT_MIN_V_PORCH))
+ vsyncandback_porch = vsync + CVT_MIN_V_PORCH;
+ else
+ vsyncandback_porch = tmp1;
+ /* 10. Find number of lines in back porch */
+ vback_porch = vsyncandback_porch - vsync;
+ drm_mode->vtotal = vdisplay_rnd + 2 * vmargin +
+ vsyncandback_porch + CVT_MIN_V_PORCH;
+ /* 5) Definition of Horizontal blanking time limitation */
+ /* Gradient (%/kHz) - default 600 */
+#define CVT_M_FACTOR 600
+ /* Offset (%) - default 40 */
+#define CVT_C_FACTOR 40
+ /* Blanking time scaling factor - default 128 */
+#define CVT_K_FACTOR 128
+ /* Scaling factor weighting - default 20 */
+#define CVT_J_FACTOR 20
+#define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256)
+#define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \
+ CVT_J_FACTOR)
+ /* 12. Find ideal blanking duty cycle from formula */
+ hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME *
+ hperiod / 1000;
+ /* 13. Blanking time */
+ if (hblank_percentage < 20 * HV_FACTOR)
+ hblank_percentage = 20 * HV_FACTOR;
+ hblank = drm_mode->hdisplay * hblank_percentage /
+ (100 * HV_FACTOR - hblank_percentage);
+ hblank -= hblank % (2 * CVT_H_GRANULARITY);
+ /* 14. find the total pixels per line */
+ drm_mode->htotal = drm_mode->hdisplay + hblank;
+ drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2;
+ drm_mode->hsync_start = drm_mode->hsync_end -
+ (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100;
+ drm_mode->hsync_start += CVT_H_GRANULARITY -
+ drm_mode->hsync_start % CVT_H_GRANULARITY;
+ /* fill the Vsync values */
+ drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH;
+ drm_mode->vsync_end = drm_mode->vsync_start + vsync;
+ } else {
+ /* Reduced blanking */
+ /* Minimum vertical blanking interval time (µs)- default 460 */
+#define CVT_RB_MIN_VBLANK 460
+ /* Fixed number of clocks for horizontal sync */
+#define CVT_RB_H_SYNC 32
+ /* Fixed number of clocks for horizontal blanking */
+#define CVT_RB_H_BLANK 160
+ /* Fixed number of lines for vertical front porch - default 3*/
+#define CVT_RB_VFPORCH 3
+ int vbilines;
+ int tmp1, tmp2;
+ /* 8. Estimate Horizontal period. */
+ tmp1 = HV_FACTOR * 1000000 -
+ CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate;
+ tmp2 = vdisplay_rnd + 2 * vmargin;
+ hperiod = tmp1 / (tmp2 * vfieldrate);
+ /* 9. Find number of lines in vertical blanking */
+ vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1;
+ /* 10. Check if vertical blanking is sufficient */
+ if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH))
+ vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH;
+ /* 11. Find total number of lines in vertical field */
+ drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines;
+ /* 12. Find total number of pixels in a line */
+ drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK;
+ /* Fill in HSync values */
+ drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2;
+ drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC;
+ /* Fill in VSync values */
+ drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH;
+ drm_mode->vsync_end = drm_mode->vsync_start + vsync;
+ }
+ /* 15/13. Find pixel clock frequency (kHz for xf86) */
+ tmp = drm_mode->htotal; /* perform intermediate calcs in u64 */
+ tmp *= HV_FACTOR * 1000;
+ do_div(tmp, hperiod);
+ tmp -= drm_mode->clock % CVT_CLOCK_STEP;
+ drm_mode->clock = tmp;
+ /* 18/16. Find actual vertical frame frequency */
+ /* ignore - just set the mode flag for interlaced */
+ if (interlaced) {
+ drm_mode->vtotal *= 2;
+ drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
+ }
+ /* Fill the mode line name */
+ drm_mode_set_name(drm_mode);
+ if (reduced)
+ drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC |
+ DRM_MODE_FLAG_NVSYNC);
+ else
+ drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC |
+ DRM_MODE_FLAG_NHSYNC);
+
+ return drm_mode;
+}
+EXPORT_SYMBOL(drm_cvt_mode);
+
+/**
+ * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm
+ * @dev: drm device
+ * @hdisplay: hdisplay size
+ * @vdisplay: vdisplay size
+ * @vrefresh: vrefresh rate.
+ * @interlaced: whether to compute an interlaced mode
+ * @margins: desired margin (borders) size
+ * @GTF_M: extended GTF formula parameters
+ * @GTF_2C: extended GTF formula parameters
+ * @GTF_K: extended GTF formula parameters
+ * @GTF_2J: extended GTF formula parameters
+ *
+ * GTF feature blocks specify C and J in multiples of 0.5, so we pass them
+ * in here multiplied by two. For a C of 40, pass in 80.
+ *
+ * Returns:
+ * The modeline based on the full GTF algorithm stored in a drm_display_mode object.
+ * The display mode object is allocated with drm_mode_create(). Returns NULL
+ * when no mode could be allocated.
+ */
+struct drm_display_mode *
+drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay,
+ int vrefresh, bool interlaced, int margins,
+ int GTF_M, int GTF_2C, int GTF_K, int GTF_2J)
+{ /* 1) top/bottom margin size (% of height) - default: 1.8, */
+#define GTF_MARGIN_PERCENTAGE 18
+ /* 2) character cell horizontal granularity (pixels) - default 8 */
+#define GTF_CELL_GRAN 8
+ /* 3) Minimum vertical porch (lines) - default 3 */
+#define GTF_MIN_V_PORCH 1
+ /* width of vsync in lines */
+#define V_SYNC_RQD 3
+ /* width of hsync as % of total line */
+#define H_SYNC_PERCENT 8
+ /* min time of vsync + back porch (microsec) */
+#define MIN_VSYNC_PLUS_BP 550
+ /* C' and M' are part of the Blanking Duty Cycle computation */
+#define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2)
+#define GTF_M_PRIME (GTF_K * GTF_M / 256)
+ struct drm_display_mode *drm_mode;
+ unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd;
+ int top_margin, bottom_margin;
+ int interlace;
+ unsigned int hfreq_est;
+ int vsync_plus_bp, vback_porch;
+ unsigned int vtotal_lines, vfieldrate_est, hperiod;
+ unsigned int vfield_rate, vframe_rate;
+ int left_margin, right_margin;
+ unsigned int total_active_pixels, ideal_duty_cycle;
+ unsigned int hblank, total_pixels, pixel_freq;
+ int hsync, hfront_porch, vodd_front_porch_lines;
+ unsigned int tmp1, tmp2;
+
+ drm_mode = drm_mode_create(dev);
+ if (!drm_mode)
+ return NULL;
+
+ /* 1. In order to give correct results, the number of horizontal
+ * pixels requested is first processed to ensure that it is divisible
+ * by the character size, by rounding it to the nearest character
+ * cell boundary:
+ */
+ hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
+ hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN;
+
+ /* 2. If interlace is requested, the number of vertical lines assumed
+ * by the calculation must be halved, as the computation calculates
+ * the number of vertical lines per field.
+ */
+ if (interlaced)
+ vdisplay_rnd = vdisplay / 2;
+ else
+ vdisplay_rnd = vdisplay;
+
+ /* 3. Find the frame rate required: */
+ if (interlaced)
+ vfieldrate_rqd = vrefresh * 2;
+ else
+ vfieldrate_rqd = vrefresh;
+
+ /* 4. Find number of lines in Top margin: */
+ top_margin = 0;
+ if (margins)
+ top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
+ 1000;
+ /* 5. Find number of lines in bottom margin: */
+ bottom_margin = top_margin;
+
+ /* 6. If interlace is required, then set variable interlace: */
+ if (interlaced)
+ interlace = 1;
+ else
+ interlace = 0;
+
+ /* 7. Estimate the Horizontal frequency */
+ {
+ tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500;
+ tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) *
+ 2 + interlace;
+ hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1;
+ }
+
+ /* 8. Find the number of lines in V sync + back porch */
+ /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */
+ vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000;
+ vsync_plus_bp = (vsync_plus_bp + 500) / 1000;
+ /* 9. Find the number of lines in V back porch alone: */
+ vback_porch = vsync_plus_bp - V_SYNC_RQD;
+ /* 10. Find the total number of lines in Vertical field period: */
+ vtotal_lines = vdisplay_rnd + top_margin + bottom_margin +
+ vsync_plus_bp + GTF_MIN_V_PORCH;
+ /* 11. Estimate the Vertical field frequency: */
+ vfieldrate_est = hfreq_est / vtotal_lines;
+ /* 12. Find the actual horizontal period: */
+ hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines);
+
+ /* 13. Find the actual Vertical field frequency: */
+ vfield_rate = hfreq_est / vtotal_lines;
+ /* 14. Find the Vertical frame frequency: */
+ if (interlaced)
+ vframe_rate = vfield_rate / 2;
+ else
+ vframe_rate = vfield_rate;
+ /* 15. Find number of pixels in left margin: */
+ if (margins)
+ left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
+ 1000;
+ else
+ left_margin = 0;
+
+ /* 16.Find number of pixels in right margin: */
+ right_margin = left_margin;
+ /* 17.Find total number of active pixels in image and left and right */
+ total_active_pixels = hdisplay_rnd + left_margin + right_margin;
+ /* 18.Find the ideal blanking duty cycle from blanking duty cycle */
+ ideal_duty_cycle = GTF_C_PRIME * 1000 -
+ (GTF_M_PRIME * 1000000 / hfreq_est);
+ /* 19.Find the number of pixels in the blanking time to the nearest
+ * double character cell: */
+ hblank = total_active_pixels * ideal_duty_cycle /
+ (100000 - ideal_duty_cycle);
+ hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN);
+ hblank = hblank * 2 * GTF_CELL_GRAN;
+ /* 20.Find total number of pixels: */
+ total_pixels = total_active_pixels + hblank;
+ /* 21.Find pixel clock frequency: */
+ pixel_freq = total_pixels * hfreq_est / 1000;
+ /* Stage 1 computations are now complete; I should really pass
+ * the results to another function and do the Stage 2 computations,
+ * but I only need a few more values so I'll just append the
+ * computations here for now */
+ /* 17. Find the number of pixels in the horizontal sync period: */
+ hsync = H_SYNC_PERCENT * total_pixels / 100;
+ hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
+ hsync = hsync * GTF_CELL_GRAN;
+ /* 18. Find the number of pixels in horizontal front porch period */
+ hfront_porch = hblank / 2 - hsync;
+ /* 36. Find the number of lines in the odd front porch period: */
+ vodd_front_porch_lines = GTF_MIN_V_PORCH ;
+
+ /* finally, pack the results in the mode struct */
+ drm_mode->hdisplay = hdisplay_rnd;
+ drm_mode->hsync_start = hdisplay_rnd + hfront_porch;
+ drm_mode->hsync_end = drm_mode->hsync_start + hsync;
+ drm_mode->htotal = total_pixels;
+ drm_mode->vdisplay = vdisplay_rnd;
+ drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines;
+ drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD;
+ drm_mode->vtotal = vtotal_lines;
+
+ drm_mode->clock = pixel_freq;
+
+ if (interlaced) {
+ drm_mode->vtotal *= 2;
+ drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
+ }
+
+ drm_mode_set_name(drm_mode);
+ if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40)
+ drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC;
+ else
+ drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC;
+
+ return drm_mode;
+}
+EXPORT_SYMBOL(drm_gtf_mode_complex);
+
+/**
+ * drm_gtf_mode - create the modeline based on the GTF algorithm
+ * @dev: drm device
+ * @hdisplay: hdisplay size
+ * @vdisplay: vdisplay size
+ * @vrefresh: vrefresh rate.
+ * @interlaced: whether to compute an interlaced mode
+ * @margins: desired margin (borders) size
+ *
+ * return the modeline based on GTF algorithm
+ *
+ * This function is to create the modeline based on the GTF algorithm.
+ * Generalized Timing Formula is derived from:
+ *
+ * GTF Spreadsheet by Andy Morrish (1/5/97)
+ * available at http://www.vesa.org
+ *
+ * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c.
+ * What I have done is to translate it by using integer calculation.
+ * I also refer to the function of fb_get_mode in the file of
+ * drivers/video/fbmon.c
+ *
+ * Standard GTF parameters::
+ *
+ * M = 600
+ * C = 40
+ * K = 128
+ * J = 20
+ *
+ * Returns:
+ * The modeline based on the GTF algorithm stored in a drm_display_mode object.
+ * The display mode object is allocated with drm_mode_create(). Returns NULL
+ * when no mode could be allocated.
+ */
+struct drm_display_mode *
+drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh,
+ bool interlaced, int margins)
+{
+ return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh,
+ interlaced, margins,
+ 600, 40 * 2, 128, 20 * 2);
+}
+EXPORT_SYMBOL(drm_gtf_mode);
+
+#ifdef CONFIG_VIDEOMODE_HELPERS
+/**
+ * drm_display_mode_from_videomode - fill in @dmode using @vm,
+ * @vm: videomode structure to use as source
+ * @dmode: drm_display_mode structure to use as destination
+ *
+ * Fills out @dmode using the display mode specified in @vm.
+ */
+void drm_display_mode_from_videomode(const struct videomode *vm,
+ struct drm_display_mode *dmode)
+{
+ dmode->hdisplay = vm->hactive;
+ dmode->hsync_start = dmode->hdisplay + vm->hfront_porch;
+ dmode->hsync_end = dmode->hsync_start + vm->hsync_len;
+ dmode->htotal = dmode->hsync_end + vm->hback_porch;
+
+ dmode->vdisplay = vm->vactive;
+ dmode->vsync_start = dmode->vdisplay + vm->vfront_porch;
+ dmode->vsync_end = dmode->vsync_start + vm->vsync_len;
+ dmode->vtotal = dmode->vsync_end + vm->vback_porch;
+
+ dmode->clock = vm->pixelclock / 1000;
+
+ dmode->flags = 0;
+ if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH)
+ dmode->flags |= DRM_MODE_FLAG_PHSYNC;
+ else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW)
+ dmode->flags |= DRM_MODE_FLAG_NHSYNC;
+ if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH)
+ dmode->flags |= DRM_MODE_FLAG_PVSYNC;
+ else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW)
+ dmode->flags |= DRM_MODE_FLAG_NVSYNC;
+ if (vm->flags & DISPLAY_FLAGS_INTERLACED)
+ dmode->flags |= DRM_MODE_FLAG_INTERLACE;
+ if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN)
+ dmode->flags |= DRM_MODE_FLAG_DBLSCAN;
+ if (vm->flags & DISPLAY_FLAGS_DOUBLECLK)
+ dmode->flags |= DRM_MODE_FLAG_DBLCLK;
+ drm_mode_set_name(dmode);
+}
+EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode);
+
+/**
+ * drm_display_mode_to_videomode - fill in @vm using @dmode,
+ * @dmode: drm_display_mode structure to use as source
+ * @vm: videomode structure to use as destination
+ *
+ * Fills out @vm using the display mode specified in @dmode.
+ */
+void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
+ struct videomode *vm)
+{
+ vm->hactive = dmode->hdisplay;
+ vm->hfront_porch = dmode->hsync_start - dmode->hdisplay;
+ vm->hsync_len = dmode->hsync_end - dmode->hsync_start;
+ vm->hback_porch = dmode->htotal - dmode->hsync_end;
+
+ vm->vactive = dmode->vdisplay;
+ vm->vfront_porch = dmode->vsync_start - dmode->vdisplay;
+ vm->vsync_len = dmode->vsync_end - dmode->vsync_start;
+ vm->vback_porch = dmode->vtotal - dmode->vsync_end;
+
+ vm->pixelclock = dmode->clock * 1000;
+
+ vm->flags = 0;
+ if (dmode->flags & DRM_MODE_FLAG_PHSYNC)
+ vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
+ else if (dmode->flags & DRM_MODE_FLAG_NHSYNC)
+ vm->flags |= DISPLAY_FLAGS_HSYNC_LOW;
+ if (dmode->flags & DRM_MODE_FLAG_PVSYNC)
+ vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
+ else if (dmode->flags & DRM_MODE_FLAG_NVSYNC)
+ vm->flags |= DISPLAY_FLAGS_VSYNC_LOW;
+ if (dmode->flags & DRM_MODE_FLAG_INTERLACE)
+ vm->flags |= DISPLAY_FLAGS_INTERLACED;
+ if (dmode->flags & DRM_MODE_FLAG_DBLSCAN)
+ vm->flags |= DISPLAY_FLAGS_DOUBLESCAN;
+ if (dmode->flags & DRM_MODE_FLAG_DBLCLK)
+ vm->flags |= DISPLAY_FLAGS_DOUBLECLK;
+}
+EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode);
+
+/**
+ * drm_bus_flags_from_videomode - extract information about pixelclk and
+ * DE polarity from videomode and store it in a separate variable
+ * @vm: videomode structure to use
+ * @bus_flags: information about pixelclk, sync and DE polarity will be stored
+ * here
+ *
+ * Sets DRM_BUS_FLAG_DE_(LOW|HIGH), DRM_BUS_FLAG_PIXDATA_(POS|NEG)EDGE and
+ * DISPLAY_FLAGS_SYNC_(POS|NEG)EDGE in @bus_flags according to DISPLAY_FLAGS
+ * found in @vm
+ */
+void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags)
+{
+ *bus_flags = 0;
+ if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
+ *bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE;
+ if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
+ *bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE;
+
+ if (vm->flags & DISPLAY_FLAGS_SYNC_POSEDGE)
+ *bus_flags |= DRM_BUS_FLAG_SYNC_POSEDGE;
+ if (vm->flags & DISPLAY_FLAGS_SYNC_NEGEDGE)
+ *bus_flags |= DRM_BUS_FLAG_SYNC_NEGEDGE;
+
+ if (vm->flags & DISPLAY_FLAGS_DE_LOW)
+ *bus_flags |= DRM_BUS_FLAG_DE_LOW;
+ if (vm->flags & DISPLAY_FLAGS_DE_HIGH)
+ *bus_flags |= DRM_BUS_FLAG_DE_HIGH;
+}
+EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode);
+
+#ifdef CONFIG_OF
+/**
+ * of_get_drm_display_mode - get a drm_display_mode from devicetree
+ * @np: device_node with the timing specification
+ * @dmode: will be set to the return value
+ * @bus_flags: information about pixelclk, sync and DE polarity
+ * @index: index into the list of display timings in devicetree
+ *
+ * This function is expensive and should only be used, if only one mode is to be
+ * read from DT. To get multiple modes start with of_get_display_timings and
+ * work with that instead.
+ *
+ * Returns:
+ * 0 on success, a negative errno code when no of videomode node was found.
+ */
+int of_get_drm_display_mode(struct device_node *np,
+ struct drm_display_mode *dmode, u32 *bus_flags,
+ int index)
+{
+ struct videomode vm;
+ int ret;
+
+ ret = of_get_videomode(np, &vm, index);
+ if (ret)
+ return ret;
+
+ drm_display_mode_from_videomode(&vm, dmode);
+ if (bus_flags)
+ drm_bus_flags_from_videomode(&vm, bus_flags);
+
+ pr_debug("%pOF: got %dx%d display mode from %s\n",
+ np, vm.hactive, vm.vactive, np->name);
+ drm_mode_debug_printmodeline(dmode);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(of_get_drm_display_mode);
+#endif /* CONFIG_OF */
+#endif /* CONFIG_VIDEOMODE_HELPERS */
+
+/**
+ * drm_mode_set_name - set the name on a mode
+ * @mode: name will be set in this mode
+ *
+ * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay>
+ * with an optional 'i' suffix for interlaced modes.
+ */
+void drm_mode_set_name(struct drm_display_mode *mode)
+{
+ bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
+
+ snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s",
+ mode->hdisplay, mode->vdisplay,
+ interlaced ? "i" : "");
+}
+EXPORT_SYMBOL(drm_mode_set_name);
+
+/**
+ * drm_mode_hsync - get the hsync of a mode
+ * @mode: mode
+ *
+ * Returns:
+ * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the
+ * value first if it is not yet set.
+ */
+int drm_mode_hsync(const struct drm_display_mode *mode)
+{
+ unsigned int calc_val;
+
+ if (mode->hsync)
+ return mode->hsync;
+
+ if (mode->htotal < 0)
+ return 0;
+
+ calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */
+ calc_val += 500; /* round to 1000Hz */
+ calc_val /= 1000; /* truncate to kHz */
+
+ return calc_val;
+}
+EXPORT_SYMBOL(drm_mode_hsync);
+
+/**
+ * drm_mode_vrefresh - get the vrefresh of a mode
+ * @mode: mode
+ *
+ * Returns:
+ * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the
+ * value first if it is not yet set.
+ */
+int drm_mode_vrefresh(const struct drm_display_mode *mode)
+{
+ int refresh = 0;
+
+ if (mode->vrefresh > 0)
+ refresh = mode->vrefresh;
+ else if (mode->htotal > 0 && mode->vtotal > 0) {
+ unsigned int num, den;
+
+ num = mode->clock * 1000;
+ den = mode->htotal * mode->vtotal;
+
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ num *= 2;
+ if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
+ den *= 2;
+ if (mode->vscan > 1)
+ den *= mode->vscan;
+
+ refresh = DIV_ROUND_CLOSEST(num, den);
+ }
+ return refresh;
+}
+EXPORT_SYMBOL(drm_mode_vrefresh);
+
+/**
+ * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode
+ * @mode: mode to query
+ * @hdisplay: hdisplay value to fill in
+ * @vdisplay: vdisplay value to fill in
+ *
+ * The vdisplay value will be doubled if the specified mode is a stereo mode of
+ * the appropriate layout.
+ */
+void drm_mode_get_hv_timing(const struct drm_display_mode *mode,
+ int *hdisplay, int *vdisplay)
+{
+ struct drm_display_mode adjusted = *mode;
+
+ drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
+ *hdisplay = adjusted.crtc_hdisplay;
+ *vdisplay = adjusted.crtc_vdisplay;
+}
+EXPORT_SYMBOL(drm_mode_get_hv_timing);
+
+/**
+ * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters
+ * @p: mode
+ * @adjust_flags: a combination of adjustment flags
+ *
+ * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary.
+ *
+ * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of
+ * interlaced modes.
+ * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for
+ * buffers containing two eyes (only adjust the timings when needed, eg. for
+ * "frame packing" or "side by side full").
+ * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not*
+ * be performed for doublescan and vscan > 1 modes respectively.
+ */
+void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
+{
+ if (!p)
+ return;
+
+ p->crtc_clock = p->clock;
+ p->crtc_hdisplay = p->hdisplay;
+ p->crtc_hsync_start = p->hsync_start;
+ p->crtc_hsync_end = p->hsync_end;
+ p->crtc_htotal = p->htotal;
+ p->crtc_hskew = p->hskew;
+ p->crtc_vdisplay = p->vdisplay;
+ p->crtc_vsync_start = p->vsync_start;
+ p->crtc_vsync_end = p->vsync_end;
+ p->crtc_vtotal = p->vtotal;
+
+ if (p->flags & DRM_MODE_FLAG_INTERLACE) {
+ if (adjust_flags & CRTC_INTERLACE_HALVE_V) {
+ p->crtc_vdisplay /= 2;
+ p->crtc_vsync_start /= 2;
+ p->crtc_vsync_end /= 2;
+ p->crtc_vtotal /= 2;
+ }
+ }
+
+ if (!(adjust_flags & CRTC_NO_DBLSCAN)) {
+ if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
+ p->crtc_vdisplay *= 2;
+ p->crtc_vsync_start *= 2;
+ p->crtc_vsync_end *= 2;
+ p->crtc_vtotal *= 2;
+ }
+ }
+
+ if (!(adjust_flags & CRTC_NO_VSCAN)) {
+ if (p->vscan > 1) {
+ p->crtc_vdisplay *= p->vscan;
+ p->crtc_vsync_start *= p->vscan;
+ p->crtc_vsync_end *= p->vscan;
+ p->crtc_vtotal *= p->vscan;
+ }
+ }
+
+ if (adjust_flags & CRTC_STEREO_DOUBLE) {
+ unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK;
+
+ switch (layout) {
+ case DRM_MODE_FLAG_3D_FRAME_PACKING:
+ p->crtc_clock *= 2;
+ p->crtc_vdisplay += p->crtc_vtotal;
+ p->crtc_vsync_start += p->crtc_vtotal;
+ p->crtc_vsync_end += p->crtc_vtotal;
+ p->crtc_vtotal += p->crtc_vtotal;
+ break;
+ }
+ }
+
+ p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay);
+ p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal);
+ p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay);
+ p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal);
+}
+EXPORT_SYMBOL(drm_mode_set_crtcinfo);
+
+/**
+ * drm_mode_copy - copy the mode
+ * @dst: mode to overwrite
+ * @src: mode to copy
+ *
+ * Copy an existing mode into another mode, preserving the object id and
+ * list head of the destination mode.
+ */
+void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src)
+{
+ int id = dst->base.id;
+ struct list_head head = dst->head;
+
+ *dst = *src;
+ dst->base.id = id;
+ dst->head = head;
+}
+EXPORT_SYMBOL(drm_mode_copy);
+
+/**
+ * drm_mode_duplicate - allocate and duplicate an existing mode
+ * @dev: drm_device to allocate the duplicated mode for
+ * @mode: mode to duplicate
+ *
+ * Just allocate a new mode, copy the existing mode into it, and return
+ * a pointer to it. Used to create new instances of established modes.
+ *
+ * Returns:
+ * Pointer to duplicated mode on success, NULL on error.
+ */
+struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
+ const struct drm_display_mode *mode)
+{
+ struct drm_display_mode *nmode;
+
+ nmode = drm_mode_create(dev);
+ if (!nmode)
+ return NULL;
+
+ drm_mode_copy(nmode, mode);
+
+ return nmode;
+}
+EXPORT_SYMBOL(drm_mode_duplicate);
+
+static bool drm_mode_match_timings(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ return mode1->hdisplay == mode2->hdisplay &&
+ mode1->hsync_start == mode2->hsync_start &&
+ mode1->hsync_end == mode2->hsync_end &&
+ mode1->htotal == mode2->htotal &&
+ mode1->hskew == mode2->hskew &&
+ mode1->vdisplay == mode2->vdisplay &&
+ mode1->vsync_start == mode2->vsync_start &&
+ mode1->vsync_end == mode2->vsync_end &&
+ mode1->vtotal == mode2->vtotal &&
+ mode1->vscan == mode2->vscan;
+}
+
+static bool drm_mode_match_clock(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ /*
+ * do clock check convert to PICOS
+ * so fb modes get matched the same
+ */
+ if (mode1->clock && mode2->clock)
+ return KHZ2PICOS(mode1->clock) == KHZ2PICOS(mode2->clock);
+ else
+ return mode1->clock == mode2->clock;
+}
+
+static bool drm_mode_match_flags(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ return (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) ==
+ (mode2->flags & ~DRM_MODE_FLAG_3D_MASK);
+}
+
+static bool drm_mode_match_3d_flags(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ return (mode1->flags & DRM_MODE_FLAG_3D_MASK) ==
+ (mode2->flags & DRM_MODE_FLAG_3D_MASK);
+}
+
+static bool drm_mode_match_aspect_ratio(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ return mode1->picture_aspect_ratio == mode2->picture_aspect_ratio;
+}
+
+/**
+ * drm_mode_match - test modes for (partial) equality
+ * @mode1: first mode
+ * @mode2: second mode
+ * @match_flags: which parts need to match (DRM_MODE_MATCH_*)
+ *
+ * Check to see if @mode1 and @mode2 are equivalent.
+ *
+ * Returns:
+ * True if the modes are (partially) equal, false otherwise.
+ */
+bool drm_mode_match(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2,
+ unsigned int match_flags)
+{
+ if (!mode1 && !mode2)
+ return true;
+
+ if (!mode1 || !mode2)
+ return false;
+
+ if (match_flags & DRM_MODE_MATCH_TIMINGS &&
+ !drm_mode_match_timings(mode1, mode2))
+ return false;
+
+ if (match_flags & DRM_MODE_MATCH_CLOCK &&
+ !drm_mode_match_clock(mode1, mode2))
+ return false;
+
+ if (match_flags & DRM_MODE_MATCH_FLAGS &&
+ !drm_mode_match_flags(mode1, mode2))
+ return false;
+
+ if (match_flags & DRM_MODE_MATCH_3D_FLAGS &&
+ !drm_mode_match_3d_flags(mode1, mode2))
+ return false;
+
+ if (match_flags & DRM_MODE_MATCH_ASPECT_RATIO &&
+ !drm_mode_match_aspect_ratio(mode1, mode2))
+ return false;
+
+ return true;
+}
+EXPORT_SYMBOL(drm_mode_match);
+
+/**
+ * drm_mode_equal - test modes for equality
+ * @mode1: first mode
+ * @mode2: second mode
+ *
+ * Check to see if @mode1 and @mode2 are equivalent.
+ *
+ * Returns:
+ * True if the modes are equal, false otherwise.
+ */
+bool drm_mode_equal(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ return drm_mode_match(mode1, mode2,
+ DRM_MODE_MATCH_TIMINGS |
+ DRM_MODE_MATCH_CLOCK |
+ DRM_MODE_MATCH_FLAGS |
+ DRM_MODE_MATCH_3D_FLAGS|
+ DRM_MODE_MATCH_ASPECT_RATIO);
+}
+EXPORT_SYMBOL(drm_mode_equal);
+
+/**
+ * drm_mode_equal_no_clocks - test modes for equality
+ * @mode1: first mode
+ * @mode2: second mode
+ *
+ * Check to see if @mode1 and @mode2 are equivalent, but
+ * don't check the pixel clocks.
+ *
+ * Returns:
+ * True if the modes are equal, false otherwise.
+ */
+bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ return drm_mode_match(mode1, mode2,
+ DRM_MODE_MATCH_TIMINGS |
+ DRM_MODE_MATCH_FLAGS |
+ DRM_MODE_MATCH_3D_FLAGS);
+}
+EXPORT_SYMBOL(drm_mode_equal_no_clocks);
+
+/**
+ * drm_mode_equal_no_clocks_no_stereo - test modes for equality
+ * @mode1: first mode
+ * @mode2: second mode
+ *
+ * Check to see if @mode1 and @mode2 are equivalent, but
+ * don't check the pixel clocks nor the stereo layout.
+ *
+ * Returns:
+ * True if the modes are equal, false otherwise.
+ */
+bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ return drm_mode_match(mode1, mode2,
+ DRM_MODE_MATCH_TIMINGS |
+ DRM_MODE_MATCH_FLAGS);
+}
+EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo);
+
+static enum drm_mode_status
+drm_mode_validate_basic(const struct drm_display_mode *mode)
+{
+ if (mode->type & ~DRM_MODE_TYPE_ALL)
+ return MODE_BAD;
+
+ if (mode->flags & ~DRM_MODE_FLAG_ALL)
+ return MODE_BAD;
+
+ if ((mode->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
+ return MODE_BAD;
+
+ if (mode->clock == 0)
+ return MODE_CLOCK_LOW;
+
+ if (mode->hdisplay == 0 ||
+ mode->hsync_start < mode->hdisplay ||
+ mode->hsync_end < mode->hsync_start ||
+ mode->htotal < mode->hsync_end)
+ return MODE_H_ILLEGAL;
+
+ if (mode->vdisplay == 0 ||
+ mode->vsync_start < mode->vdisplay ||
+ mode->vsync_end < mode->vsync_start ||
+ mode->vtotal < mode->vsync_end)
+ return MODE_V_ILLEGAL;
+
+ return MODE_OK;
+}
+
+/**
+ * drm_mode_validate_driver - make sure the mode is somewhat sane
+ * @dev: drm device
+ * @mode: mode to check
+ *
+ * First do basic validation on the mode, and then allow the driver
+ * to check for device/driver specific limitations via the optional
+ * &drm_mode_config_helper_funcs.mode_valid hook.
+ *
+ * Returns:
+ * The mode status
+ */
+enum drm_mode_status
+drm_mode_validate_driver(struct drm_device *dev,
+ const struct drm_display_mode *mode)
+{
+ enum drm_mode_status status;
+
+ status = drm_mode_validate_basic(mode);
+ if (status != MODE_OK)
+ return status;
+
+ if (dev->mode_config.funcs->mode_valid)
+ return dev->mode_config.funcs->mode_valid(dev, mode);
+ else
+ return MODE_OK;
+}
+EXPORT_SYMBOL(drm_mode_validate_driver);
+
+/**
+ * drm_mode_validate_size - make sure modes adhere to size constraints
+ * @mode: mode to check
+ * @maxX: maximum width
+ * @maxY: maximum height
+ *
+ * This function is a helper which can be used to validate modes against size
+ * limitations of the DRM device/connector. If a mode is too big its status
+ * member is updated with the appropriate validation failure code. The list
+ * itself is not changed.
+ *
+ * Returns:
+ * The mode status
+ */
+enum drm_mode_status
+drm_mode_validate_size(const struct drm_display_mode *mode,
+ int maxX, int maxY)
+{
+ if (maxX > 0 && mode->hdisplay > maxX)
+ return MODE_VIRTUAL_X;
+
+ if (maxY > 0 && mode->vdisplay > maxY)
+ return MODE_VIRTUAL_Y;
+
+ return MODE_OK;
+}
+EXPORT_SYMBOL(drm_mode_validate_size);
+
+/**
+ * drm_mode_validate_ycbcr420 - add 'ycbcr420-only' modes only when allowed
+ * @mode: mode to check
+ * @connector: drm connector under action
+ *
+ * This function is a helper which can be used to filter out any YCBCR420
+ * only mode, when the source doesn't support it.
+ *
+ * Returns:
+ * The mode status
+ */
+enum drm_mode_status
+drm_mode_validate_ycbcr420(const struct drm_display_mode *mode,
+ struct drm_connector *connector)
+{
+ u8 vic = drm_match_cea_mode(mode);
+ enum drm_mode_status status = MODE_OK;
+ struct drm_hdmi_info *hdmi = &connector->display_info.hdmi;
+
+ if (test_bit(vic, hdmi->y420_vdb_modes)) {
+ if (!connector->ycbcr_420_allowed)
+ status = MODE_NO_420;
+ }
+
+ return status;
+}
+EXPORT_SYMBOL(drm_mode_validate_ycbcr420);
+
+#define MODE_STATUS(status) [MODE_ ## status + 3] = #status
+
+static const char * const drm_mode_status_names[] = {
+ MODE_STATUS(OK),
+ MODE_STATUS(HSYNC),
+ MODE_STATUS(VSYNC),
+ MODE_STATUS(H_ILLEGAL),
+ MODE_STATUS(V_ILLEGAL),
+ MODE_STATUS(BAD_WIDTH),
+ MODE_STATUS(NOMODE),
+ MODE_STATUS(NO_INTERLACE),
+ MODE_STATUS(NO_DBLESCAN),
+ MODE_STATUS(NO_VSCAN),
+ MODE_STATUS(MEM),
+ MODE_STATUS(VIRTUAL_X),
+ MODE_STATUS(VIRTUAL_Y),
+ MODE_STATUS(MEM_VIRT),
+ MODE_STATUS(NOCLOCK),
+ MODE_STATUS(CLOCK_HIGH),
+ MODE_STATUS(CLOCK_LOW),
+ MODE_STATUS(CLOCK_RANGE),
+ MODE_STATUS(BAD_HVALUE),
+ MODE_STATUS(BAD_VVALUE),
+ MODE_STATUS(BAD_VSCAN),
+ MODE_STATUS(HSYNC_NARROW),
+ MODE_STATUS(HSYNC_WIDE),
+ MODE_STATUS(HBLANK_NARROW),
+ MODE_STATUS(HBLANK_WIDE),
+ MODE_STATUS(VSYNC_NARROW),
+ MODE_STATUS(VSYNC_WIDE),
+ MODE_STATUS(VBLANK_NARROW),
+ MODE_STATUS(VBLANK_WIDE),
+ MODE_STATUS(PANEL),
+ MODE_STATUS(INTERLACE_WIDTH),
+ MODE_STATUS(ONE_WIDTH),
+ MODE_STATUS(ONE_HEIGHT),
+ MODE_STATUS(ONE_SIZE),
+ MODE_STATUS(NO_REDUCED),
+ MODE_STATUS(NO_STEREO),
+ MODE_STATUS(NO_420),
+ MODE_STATUS(STALE),
+ MODE_STATUS(BAD),
+ MODE_STATUS(ERROR),
+};
+
+#undef MODE_STATUS
+
+const char *drm_get_mode_status_name(enum drm_mode_status status)
+{
+ int index = status + 3;
+
+ if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names)))
+ return "";
+
+ return drm_mode_status_names[index];
+}
+
+/**
+ * drm_mode_prune_invalid - remove invalid modes from mode list
+ * @dev: DRM device
+ * @mode_list: list of modes to check
+ * @verbose: be verbose about it
+ *
+ * This helper function can be used to prune a display mode list after
+ * validation has been completed. All modes who's status is not MODE_OK will be
+ * removed from the list, and if @verbose the status code and mode name is also
+ * printed to dmesg.
+ */
+void drm_mode_prune_invalid(struct drm_device *dev,
+ struct list_head *mode_list, bool verbose)
+{
+ struct drm_display_mode *mode, *t;
+
+ list_for_each_entry_safe(mode, t, mode_list, head) {
+ if (mode->status != MODE_OK) {
+ list_del(&mode->head);
+ if (verbose) {
+ drm_mode_debug_printmodeline(mode);
+ DRM_DEBUG_KMS("Not using %s mode: %s\n",
+ mode->name,
+ drm_get_mode_status_name(mode->status));
+ }
+ drm_mode_destroy(dev, mode);
+ }
+ }
+}
+EXPORT_SYMBOL(drm_mode_prune_invalid);
+
+/**
+ * drm_mode_compare - compare modes for favorability
+ * @priv: unused
+ * @lh_a: list_head for first mode
+ * @lh_b: list_head for second mode
+ *
+ * Compare two modes, given by @lh_a and @lh_b, returning a value indicating
+ * which is better.
+ *
+ * Returns:
+ * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or
+ * positive if @lh_b is better than @lh_a.
+ */
+static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b)
+{
+ struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head);
+ struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head);
+ int diff;
+
+ diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) -
+ ((a->type & DRM_MODE_TYPE_PREFERRED) != 0);
+ if (diff)
+ return diff;
+ diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay;
+ if (diff)
+ return diff;
+
+ diff = b->vrefresh - a->vrefresh;
+ if (diff)
+ return diff;
+
+ diff = b->clock - a->clock;
+ return diff;
+}
+
+/**
+ * drm_mode_sort - sort mode list
+ * @mode_list: list of drm_display_mode structures to sort
+ *
+ * Sort @mode_list by favorability, moving good modes to the head of the list.
+ */
+void drm_mode_sort(struct list_head *mode_list)
+{
+ list_sort(NULL, mode_list, drm_mode_compare);
+}
+EXPORT_SYMBOL(drm_mode_sort);
+
+/**
+ * drm_connector_list_update - update the mode list for the connector
+ * @connector: the connector to update
+ *
+ * This moves the modes from the @connector probed_modes list
+ * to the actual mode list. It compares the probed mode against the current
+ * list and only adds different/new modes.
+ *
+ * This is just a helper functions doesn't validate any modes itself and also
+ * doesn't prune any invalid modes. Callers need to do that themselves.
+ */
+void drm_connector_list_update(struct drm_connector *connector)
+{
+ struct drm_display_mode *pmode, *pt;
+
+ WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
+
+ list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) {
+ struct drm_display_mode *mode;
+ bool found_it = false;
+
+ /* go through current modes checking for the new probed mode */
+ list_for_each_entry(mode, &connector->modes, head) {
+ if (!drm_mode_equal(pmode, mode))
+ continue;
+
+ found_it = true;
+
+ /*
+ * If the old matching mode is stale (ie. left over
+ * from a previous probe) just replace it outright.
+ * Otherwise just merge the type bits between all
+ * equal probed modes.
+ *
+ * If two probed modes are considered equal, pick the
+ * actual timings from the one that's marked as
+ * preferred (in case the match isn't 100%). If
+ * multiple or zero preferred modes are present, favor
+ * the mode added to the probed_modes list first.
+ */
+ if (mode->status == MODE_STALE) {
+ drm_mode_copy(mode, pmode);
+ } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 &&
+ (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) {
+ pmode->type |= mode->type;
+ drm_mode_copy(mode, pmode);
+ } else {
+ mode->type |= pmode->type;
+ }
+
+ list_del(&pmode->head);
+ drm_mode_destroy(connector->dev, pmode);
+ break;
+ }
+
+ if (!found_it) {
+ list_move_tail(&pmode->head, &connector->modes);
+ }
+ }
+}
+EXPORT_SYMBOL(drm_connector_list_update);
+
+/**
+ * drm_mode_parse_command_line_for_connector - parse command line modeline for connector
+ * @mode_option: optional per connector mode option
+ * @connector: connector to parse modeline for
+ * @mode: preallocated drm_cmdline_mode structure to fill out
+ *
+ * This parses @mode_option command line modeline for modes and options to
+ * configure the connector. If @mode_option is NULL the default command line
+ * modeline in fb_mode_option will be parsed instead.
+ *
+ * This uses the same parameters as the fb modedb.c, except for an extra
+ * force-enable, force-enable-digital and force-disable bit at the end::
+ *
+ * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
+ *
+ * The intermediate drm_cmdline_mode structure is required to store additional
+ * options from the command line modline like the force-enable/disable flag.
+ *
+ * Returns:
+ * True if a valid modeline has been parsed, false otherwise.
+ */
+bool drm_mode_parse_command_line_for_connector(const char *mode_option,
+ struct drm_connector *connector,
+ struct drm_cmdline_mode *mode)
+{
+ const char *name;
+ unsigned int namelen;
+ bool res_specified = false, bpp_specified = false, refresh_specified = false;
+ unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
+ bool yres_specified = false, cvt = false, rb = false;
+ bool interlace = false, margins = false, was_digit = false;
+ int i;
+ enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
+
+#ifdef CONFIG_FB
+ if (!mode_option)
+ mode_option = fb_mode_option;
+#endif
+
+ if (!mode_option) {
+ mode->specified = false;
+ return false;
+ }
+
+ name = mode_option;
+ namelen = strlen(name);
+ for (i = namelen-1; i >= 0; i--) {
+ switch (name[i]) {
+ case '@':
+ if (!refresh_specified && !bpp_specified &&
+ !yres_specified && !cvt && !rb && was_digit) {
+ refresh = simple_strtol(&name[i+1], NULL, 10);
+ refresh_specified = true;
+ was_digit = false;
+ } else
+ goto done;
+ break;
+ case '-':
+ if (!bpp_specified && !yres_specified && !cvt &&
+ !rb && was_digit) {
+ bpp = simple_strtol(&name[i+1], NULL, 10);
+ bpp_specified = true;
+ was_digit = false;
+ } else
+ goto done;
+ break;
+ case 'x':
+ if (!yres_specified && was_digit) {
+ yres = simple_strtol(&name[i+1], NULL, 10);
+ yres_specified = true;
+ was_digit = false;
+ } else
+ goto done;
+ break;
+ case '0' ... '9':
+ was_digit = true;
+ break;
+ case 'M':
+ if (yres_specified || cvt || was_digit)
+ goto done;
+ cvt = true;
+ break;
+ case 'R':
+ if (yres_specified || cvt || rb || was_digit)
+ goto done;
+ rb = true;
+ break;
+ case 'm':
+ if (cvt || yres_specified || was_digit)
+ goto done;
+ margins = true;
+ break;
+ case 'i':
+ if (cvt || yres_specified || was_digit)
+ goto done;
+ interlace = true;
+ break;
+ case 'e':
+ if (yres_specified || bpp_specified || refresh_specified ||
+ was_digit || (force != DRM_FORCE_UNSPECIFIED))
+ goto done;
+
+ force = DRM_FORCE_ON;
+ break;
+ case 'D':
+ if (yres_specified || bpp_specified || refresh_specified ||
+ was_digit || (force != DRM_FORCE_UNSPECIFIED))
+ goto done;
+
+ if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
+ (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
+ force = DRM_FORCE_ON;
+ else
+ force = DRM_FORCE_ON_DIGITAL;
+ break;
+ case 'd':
+ if (yres_specified || bpp_specified || refresh_specified ||
+ was_digit || (force != DRM_FORCE_UNSPECIFIED))
+ goto done;
+
+ force = DRM_FORCE_OFF;
+ break;
+ default:
+ goto done;
+ }
+ }
+
+ if (i < 0 && yres_specified) {
+ char *ch;
+ xres = simple_strtol(name, &ch, 10);
+ if ((ch != NULL) && (*ch == 'x'))
+ res_specified = true;
+ else
+ i = ch - name;
+ } else if (!yres_specified && was_digit) {
+ /* catch mode that begins with digits but has no 'x' */
+ i = 0;
+ }
+done:
+ if (i >= 0) {
+ pr_warn("[drm] parse error at position %i in video mode '%s'\n",
+ i, name);
+ mode->specified = false;
+ return false;
+ }
+
+ if (res_specified) {
+ mode->specified = true;
+ mode->xres = xres;
+ mode->yres = yres;
+ }
+
+ if (refresh_specified) {
+ mode->refresh_specified = true;
+ mode->refresh = refresh;
+ }
+
+ if (bpp_specified) {
+ mode->bpp_specified = true;
+ mode->bpp = bpp;
+ }
+ mode->rb = rb;
+ mode->cvt = cvt;
+ mode->interlace = interlace;
+ mode->margins = margins;
+ mode->force = force;
+
+ return true;
+}
+EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector);
+
+/**
+ * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode
+ * @dev: DRM device to create the new mode for
+ * @cmd: input command line modeline
+ *
+ * Returns:
+ * Pointer to converted mode on success, NULL on error.
+ */
+struct drm_display_mode *
+drm_mode_create_from_cmdline_mode(struct drm_device *dev,
+ struct drm_cmdline_mode *cmd)
+{
+ struct drm_display_mode *mode;
+
+ if (cmd->cvt)
+ mode = drm_cvt_mode(dev,
+ cmd->xres, cmd->yres,
+ cmd->refresh_specified ? cmd->refresh : 60,
+ cmd->rb, cmd->interlace,
+ cmd->margins);
+ else
+ mode = drm_gtf_mode(dev,
+ cmd->xres, cmd->yres,
+ cmd->refresh_specified ? cmd->refresh : 60,
+ cmd->interlace,
+ cmd->margins);
+ if (!mode)
+ return NULL;
+
+ mode->type |= DRM_MODE_TYPE_USERDEF;
+ /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */
+ if (cmd->xres == 1366)
+ drm_mode_fixup_1366x768(mode);
+ drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
+ return mode;
+}
+EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode);
+
+/**
+ * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
+ * @out: drm_mode_modeinfo struct to return to the user
+ * @in: drm_display_mode to use
+ *
+ * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
+ * the user.
+ */
+void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
+ const struct drm_display_mode *in)
+{
+ WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX ||
+ in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX ||
+ in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX ||
+ in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX ||
+ in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX,
+ "timing values too large for mode info\n");
+
+ out->clock = in->clock;
+ out->hdisplay = in->hdisplay;
+ out->hsync_start = in->hsync_start;
+ out->hsync_end = in->hsync_end;
+ out->htotal = in->htotal;
+ out->hskew = in->hskew;
+ out->vdisplay = in->vdisplay;
+ out->vsync_start = in->vsync_start;
+ out->vsync_end = in->vsync_end;
+ out->vtotal = in->vtotal;
+ out->vscan = in->vscan;
+ out->vrefresh = in->vrefresh;
+ out->flags = in->flags;
+ out->type = in->type;
+
+ switch (in->picture_aspect_ratio) {
+ case HDMI_PICTURE_ASPECT_4_3:
+ out->flags |= DRM_MODE_FLAG_PIC_AR_4_3;
+ break;
+ case HDMI_PICTURE_ASPECT_16_9:
+ out->flags |= DRM_MODE_FLAG_PIC_AR_16_9;
+ break;
+ case HDMI_PICTURE_ASPECT_64_27:
+ out->flags |= DRM_MODE_FLAG_PIC_AR_64_27;
+ break;
+ case HDMI_PICTURE_ASPECT_256_135:
+ out->flags |= DRM_MODE_FLAG_PIC_AR_256_135;
+ break;
+ case HDMI_PICTURE_ASPECT_RESERVED:
+ default:
+ out->flags |= DRM_MODE_FLAG_PIC_AR_NONE;
+ break;
+ }
+
+ strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
+ out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
+}
+
+/**
+ * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode
+ * @dev: drm device
+ * @out: drm_display_mode to return to the user
+ * @in: drm_mode_modeinfo to use
+ *
+ * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
+ * the caller.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_convert_umode(struct drm_device *dev,
+ struct drm_display_mode *out,
+ const struct drm_mode_modeinfo *in)
+{
+ if (in->clock > INT_MAX || in->vrefresh > INT_MAX)
+ return -ERANGE;
+
+ out->clock = in->clock;
+ out->hdisplay = in->hdisplay;
+ out->hsync_start = in->hsync_start;
+ out->hsync_end = in->hsync_end;
+ out->htotal = in->htotal;
+ out->hskew = in->hskew;
+ out->vdisplay = in->vdisplay;
+ out->vsync_start = in->vsync_start;
+ out->vsync_end = in->vsync_end;
+ out->vtotal = in->vtotal;
+ out->vscan = in->vscan;
+ out->vrefresh = in->vrefresh;
+ out->flags = in->flags;
+ /*
+ * Old xf86-video-vmware (possibly others too) used to
+ * leave 'type' unititialized. Just ignore any bits we
+ * don't like. It's a just hint after all, and more
+ * useful for the kernel->userspace direction anyway.
+ */
+ out->type = in->type & DRM_MODE_TYPE_ALL;
+ strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
+ out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
+
+ /* Clearing picture aspect ratio bits from out flags,
+ * as the aspect-ratio information is not stored in
+ * flags for kernel-mode, but in picture_aspect_ratio.
+ */
+ out->flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
+
+ switch (in->flags & DRM_MODE_FLAG_PIC_AR_MASK) {
+ case DRM_MODE_FLAG_PIC_AR_4_3:
+ out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_4_3;
+ break;
+ case DRM_MODE_FLAG_PIC_AR_16_9:
+ out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_16_9;
+ break;
+ case DRM_MODE_FLAG_PIC_AR_64_27:
+ out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_64_27;
+ break;
+ case DRM_MODE_FLAG_PIC_AR_256_135:
+ out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_256_135;
+ break;
+ default:
+ out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
+ break;
+ }
+
+ out->status = drm_mode_validate_driver(dev, out);
+ if (out->status != MODE_OK)
+ return -EINVAL;
+
+ drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V);
+
+ return 0;
+}
+
+/**
+ * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420
+ * output format
+ *
+ * @display: display under action
+ * @mode: video mode to be tested.
+ *
+ * Returns:
+ * true if the mode can be supported in YCBCR420 format
+ * false if not.
+ */
+bool drm_mode_is_420_only(const struct drm_display_info *display,
+ const struct drm_display_mode *mode)
+{
+ u8 vic = drm_match_cea_mode(mode);
+
+ return test_bit(vic, display->hdmi.y420_vdb_modes);
+}
+EXPORT_SYMBOL(drm_mode_is_420_only);
+
+/**
+ * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420
+ * output format also (along with RGB/YCBCR444/422)
+ *
+ * @display: display under action.
+ * @mode: video mode to be tested.
+ *
+ * Returns:
+ * true if the mode can be support YCBCR420 format
+ * false if not.
+ */
+bool drm_mode_is_420_also(const struct drm_display_info *display,
+ const struct drm_display_mode *mode)
+{
+ u8 vic = drm_match_cea_mode(mode);
+
+ return test_bit(vic, display->hdmi.y420_cmdb_modes);
+}
+EXPORT_SYMBOL(drm_mode_is_420_also);
+/**
+ * drm_mode_is_420 - if a given videomode can be supported in YCBCR420
+ * output format
+ *
+ * @display: display under action.
+ * @mode: video mode to be tested.
+ *
+ * Returns:
+ * true if the mode can be supported in YCBCR420 format
+ * false if not.
+ */
+bool drm_mode_is_420(const struct drm_display_info *display,
+ const struct drm_display_mode *mode)
+{
+ return drm_mode_is_420_only(display, mode) ||
+ drm_mode_is_420_also(display, mode);
+}
+EXPORT_SYMBOL(drm_mode_is_420);