* 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/ctype.h>
#include <linux/list.h>
#include <linux/list_sort.h>
#include <linux/export.h>
#include <video/of_videomode.h>
#include <video/videomode.h>
#include <drm/drm_crtc.h>
#include <drm/drm_device.h>
#include <drm/drm_modes.h>
#include <drm/drm_print.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;
}
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;
}
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
#define CVT_MARGIN_PERCENTAGE 18
#define CVT_H_GRANULARITY 8
#define CVT_MIN_V_PORCH 3
#define CVT_MIN_V_BPORCH 6
#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;
if (!hdisplay || !vdisplay) {
return NULL;
}
* return directly
*/
drm_mode = drm_mode_create(dev);
if (!drm_mode) {
return NULL;
}
if (!vrefresh) {
vrefresh = 0x3c;
}
if (interlaced) {
vfieldrate = vrefresh * 0x2;
} else {
vfieldrate = vrefresh;
}
hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY);
hmargin = 0;
if (margins) {
hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 0x3e8;
hmargin -= hmargin % CVT_H_GRANULARITY;
}
drm_mode->hdisplay = hdisplay_rnd + 0x2 * hmargin;
if (interlaced) {
vdisplay_rnd = vdisplay / 0x2;
} else {
vdisplay_rnd = vdisplay;
}
vmargin = 0;
if (margins) {
vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 0x3e8;
}
drm_mode->vdisplay = vdisplay + 0x2 * vmargin;
if (interlaced) {
interlace = 1;
} else {
interlace = 0;
}
if (!(vdisplay % 0x3) && ((vdisplay * 0x4 / 0x3) == hdisplay)) {
vsync = 0x4;
} else if (!(vdisplay % 0x9) && ((vdisplay * 0x10 / 0x9) == hdisplay)) {
vsync = 0x5;
} else if (!(vdisplay % 0xa) && ((vdisplay * 0x10 / 0xa) == hdisplay)) {
vsync = 0x6;
} else if (!(vdisplay % 0x4) && ((vdisplay * 0x5 / 0x4) == hdisplay)) {
vsync = 0x7;
} else if (!(vdisplay % 0x9) && ((vdisplay * 0xf / 0x9) == hdisplay)) {
vsync = 0x7;
} else {
vsync = 0xa;
}
if (!reduced) {
* default 550.0
*/
int tmp1, tmp2;
#define CVT_MIN_VSYNC_BP 550
#define CVT_HSYNC_PERCENTAGE 8
unsigned int hblank_percentage;
int vsyncandback_porch, __maybe_unused vback_porch, hblank;
tmp1 = HV_FACTOR * 0xf4240 - CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate;
tmp2 = (vdisplay_rnd + 0x2 * vmargin + CVT_MIN_V_PORCH) * 0x2 + interlace;
hperiod = tmp1 * 0x2 / (tmp2 * vfieldrate);
tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1;
if (tmp1 < (vsync + CVT_MIN_V_PORCH)) {
vsyncandback_porch = vsync + CVT_MIN_V_PORCH;
} else {
vsyncandback_porch = tmp1;
}
vback_porch = vsyncandback_porch - vsync;
drm_mode->vtotal = vdisplay_rnd + 0x2 * vmargin + vsyncandback_porch + CVT_MIN_V_PORCH;
#define CVT_M_FACTOR 600
#define CVT_C_FACTOR 40
#define CVT_K_FACTOR 128
#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)
hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * hperiod / 0x03e8;
if (hblank_percentage < 0x14 * HV_FACTOR) {
hblank_percentage = 0x14 * HV_FACTOR;
}
hblank = drm_mode->hdisplay * hblank_percentage / (0x64 * HV_FACTOR - hblank_percentage);
hblank -= hblank % (0x2 * CVT_H_GRANULARITY);
drm_mode->htotal = drm_mode->hdisplay + hblank;
drm_mode->hsync_end = drm_mode->hdisplay + hblank / 0x2;
drm_mode->hsync_start = drm_mode->hsync_end - (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 0x64;
drm_mode->hsync_start += CVT_H_GRANULARITY - drm_mode->hsync_start % CVT_H_GRANULARITY;
drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH;
drm_mode->vsync_end = drm_mode->vsync_start + vsync;
} else {
#define CVT_RB_MIN_VBLANK 460
#define CVT_RB_H_SYNC 32
#define CVT_RB_H_BLANK 160
#define CVT_RB_VFPORCH 3
int vbilines;
int tmp1, tmp2;
tmp1 = HV_FACTOR * 0xf4240 - CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate;
tmp2 = vdisplay_rnd + 0x2 * vmargin;
hperiod = tmp1 / (tmp2 * vfieldrate);
vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1;
if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) {
vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH;
}
drm_mode->vtotal = vdisplay_rnd + 0x2 * vmargin + vbilines;
drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK;
drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 0x2;
drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC;
drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH;
drm_mode->vsync_end = drm_mode->vsync_start + vsync;
}
tmp = drm_mode->htotal;
tmp *= HV_FACTOR * 0x3e8;
do_div(tmp, hperiod);
tmp -= drm_mode->clock % CVT_CLOCK_STEP;
drm_mode->clock = tmp;
if (interlaced) {
drm_mode->vtotal *= 0x2;
drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
}
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)
{
#define GTF_MARGIN_PERCENTAGE 18
#define GTF_CELL_GRAN 8
#define GTF_MIN_V_PORCH 1
#define V_SYNC_RQD 3
#define H_SYNC_PERCENT 8
#define MIN_VSYNC_PLUS_BP 550
#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, __maybe_unused vback_porch;
unsigned int vtotal_lines, __maybe_unused vfieldrate_est;
unsigned int __maybe_unused hperiod;
unsigned int vfield_rate, __maybe_unused 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;
if (!hdisplay || !vdisplay) {
return NULL;
}
drm_mode = drm_mode_create(dev);
if (!drm_mode) {
return NULL;
}
* 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 / 0x2) / GTF_CELL_GRAN;
hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN;
* by the calculation must be halved, as the computation calculates
* the number of vertical lines per field.
*/
if (interlaced) {
vdisplay_rnd = vdisplay / 0x2;
} else {
vdisplay_rnd = vdisplay;
}
if (interlaced) {
vfieldrate_rqd = vrefresh * 0x2;
} else {
vfieldrate_rqd = vrefresh;
}
top_margin = 0;
if (margins) {
top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 0x1f4) / 0x3e8;
}
bottom_margin = top_margin;
if (interlaced) {
interlace = 1;
} else {
interlace = 0;
}
{
tmp1 = (0xf4240 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 0x1f4;
tmp2 = (vdisplay_rnd + 0x2 * top_margin + GTF_MIN_V_PORCH) * 0x2 + interlace;
hfreq_est = (tmp2 * 0x3e8 * vfieldrate_rqd) / tmp1;
}
vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 0x3e8;
vsync_plus_bp = (vsync_plus_bp + 0x1f4) / 0x3e8;
vback_porch = vsync_plus_bp - V_SYNC_RQD;
vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + vsync_plus_bp + GTF_MIN_V_PORCH;
vfieldrate_est = hfreq_est / vtotal_lines;
hperiod = 0xf4240 / (vfieldrate_rqd * vtotal_lines);
vfield_rate = hfreq_est / vtotal_lines;
if (interlaced) {
vframe_rate = vfield_rate / 0x2;
} else {
vframe_rate = vfield_rate;
}
if (margins) {
left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 0x1f4) / 0x3e8;
} else {
left_margin = 0x0;
}
right_margin = left_margin;
total_active_pixels = hdisplay_rnd + left_margin + right_margin;
ideal_duty_cycle = GTF_C_PRIME * 0x3e8 - (GTF_M_PRIME * 0xf4240 / hfreq_est);
* double character cell: */
hblank = total_active_pixels * ideal_duty_cycle / (0xf4240 - ideal_duty_cycle);
hblank = (hblank + GTF_CELL_GRAN) / (0x2 * GTF_CELL_GRAN);
hblank = hblank * 0x2 * GTF_CELL_GRAN;
total_pixels = total_active_pixels + hblank;
pixel_freq = total_pixels * hfreq_est / 0x3e8;
* 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 */
hsync = H_SYNC_PERCENT * total_pixels / 0x64;
hsync = (hsync + GTF_CELL_GRAN / 0x2) / GTF_CELL_GRAN;
hsync = hsync * GTF_CELL_GRAN;
hfront_porch = hblank / 0x2 - hsync;
vodd_front_porch_lines = GTF_MIN_V_PORCH;
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 *= 0x2;
drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
}
drm_mode_set_name(drm_mode);
if (GTF_M == 0x258 && GTF_2C == 0x50 && GTF_K == 0x80 && GTF_2J == 0x28) {
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 https://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:: see below
*
* 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, 0x258, 0x50, 0x80, 0x28);
}
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 / 0x3e8;
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 * 0x3e8;
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_DRIVE_(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_DRIVE_POSEDGE;
}
if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) {
*bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE;
}
if (vm->flags & DISPLAY_FLAGS_SYNC_POSEDGE) {
*bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE;
}
if (vm->flags & DISPLAY_FLAGS_SYNC_NEGEDGE) {
*bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_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\n", np, vm.hactive, vm.vactive);
drm_mode_debug_printmodeline(dmode);
return 0;
}
EXPORT_SYMBOL_GPL(of_get_drm_display_mode);
#endif
#endif
* 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);
int ret;
ret = snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", mode->hdisplay, mode->vdisplay, interlaced ? "i" : "");
}
EXPORT_SYMBOL(drm_mode_set_name);
* 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)
{
unsigned int num, den;
if (mode->htotal == 0 || mode->vtotal == 0) {
return 0;
}
num = mode->clock;
den = mode->htotal * mode->vtotal;
if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
num *= 0x2;
}
if (mode->flags & DRM_MODE_FLAG_DBLSCAN) {
den *= 0x2;
}
if (mode->vscan > 1) {
den *= mode->vscan;
}
return DIV_ROUND_CLOSEST_ULL(mul_u32_u32(num, 0x3e8), den);
}
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 /= 0x2;
p->crtc_vsync_start /= 0x2;
p->crtc_vsync_end /= 0x2;
p->crtc_vtotal /= 0x2;
}
}
if (!(adjust_flags & CRTC_NO_DBLSCAN)) {
if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
p->crtc_vdisplay *= 0x2;
p->crtc_vsync_start *= 0x2;
p->crtc_vsync_end *= 0x2;
p->crtc_vtotal *= 0x2;
}
}
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 *= 0x2;
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;
default:
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)
{
struct list_head head = dst->head;
*dst = *src;
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 + 0x3;
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 whose 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 = drm_mode_vrefresh(b) - drm_mode_vrefresh(a);
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;
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);
static int drm_mode_parse_cmdline_bpp(const char *str, char **end_ptr, struct drm_cmdline_mode *mode)
{
unsigned int bpp;
if (str[0] != '-') {
return -EINVAL;
}
str++;
bpp = simple_strtol(str, end_ptr, 0xa);
if (*end_ptr == str) {
return -EINVAL;
}
mode->bpp = bpp;
mode->bpp_specified = true;
return 0;
}
static int drm_mode_parse_cmdline_refresh(const char *str, char **end_ptr, struct drm_cmdline_mode *mode)
{
unsigned int refresh;
if (str[0] != '@') {
return -EINVAL;
}
str++;
refresh = simple_strtol(str, end_ptr, 0xa);
if (*end_ptr == str) {
return -EINVAL;
}
mode->refresh = refresh;
mode->refresh_specified = true;
return 0;
}
static int drm_mode_parse_cmdline_extra(const char *str, int length, bool freestanding,
const struct drm_connector *connector, struct drm_cmdline_mode *mode)
{
int i;
for (i = 0; i < length; i++) {
switch (str[i]) {
case 'i':
if (freestanding) {
return -EINVAL;
}
mode->interlace = true;
break;
case 'm':
if (freestanding) {
return -EINVAL;
}
mode->margins = true;
break;
case 'D':
if (mode->force != DRM_FORCE_UNSPECIFIED) {
return -EINVAL;
}
if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
(connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) {
mode->force = DRM_FORCE_ON;
} else {
mode->force = DRM_FORCE_ON_DIGITAL;
}
break;
case 'd':
if (mode->force != DRM_FORCE_UNSPECIFIED) {
return -EINVAL;
}
mode->force = DRM_FORCE_OFF;
break;
case 'e':
if (mode->force != DRM_FORCE_UNSPECIFIED) {
return -EINVAL;
}
mode->force = DRM_FORCE_ON;
break;
default:
return -EINVAL;
}
}
return 0;
}
static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length, bool extras,
const struct drm_connector *connector, struct drm_cmdline_mode *mode)
{
const char *str_start = str;
bool rb = false, cvt = false;
int xres = 0, yres = 0;
int remaining, i;
char *end_ptr;
xres = simple_strtol(str, &end_ptr, 0xa);
if (end_ptr == str) {
return -EINVAL;
}
if (end_ptr[0] != 'x') {
return -EINVAL;
}
end_ptr++;
str = end_ptr;
yres = simple_strtol(str, &end_ptr, 0xa);
if (end_ptr == str) {
return -EINVAL;
}
remaining = length - (end_ptr - str_start);
if (remaining < 0) {
return -EINVAL;
}
for (i = 0; i < remaining; i++) {
switch (end_ptr[i]) {
case 'M':
cvt = true;
break;
case 'R':
rb = true;
break;
default:
* Try to pass that to our extras parsing
* function to handle the case where the
* extras are directly after the resolution
*/
if (extras) {
int ret = drm_mode_parse_cmdline_extra(end_ptr + i, 1, false, connector, mode);
if (ret) {
return ret;
}
} else {
return -EINVAL;
}
}
}
mode->xres = xres;
mode->yres = yres;
mode->cvt = cvt;
mode->rb = rb;
return 0;
}
static int drm_mode_parse_cmdline_int(const char *delim, unsigned int *int_ret)
{
const char *value;
char *endp;
* delim must point to the '=', otherwise it is a syntax error and
* if delim points to the terminating zero, then delim + 1 wil point
* past the end of the string.
*/
if (*delim != '=') {
return -EINVAL;
}
value = delim + 1;
*int_ret = simple_strtol(value, &endp, 0xa);
if (endp == value) {
return -EINVAL;
}
return 0;
}
static int drm_mode_parse_panel_orientation(const char *delim, struct drm_cmdline_mode *mode)
{
const char *value;
if (*delim != '=') {
return -EINVAL;
}
value = delim + 1;
delim = strchr(value, ',');
if (!delim) {
delim = value + strlen(value);
}
if (!strncmp(value, "normal", delim - value)) {
mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL;
} else if (!strncmp(value, "upside_down", delim - value)) {
mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP;
} else if (!strncmp(value, "left_side_up", delim - value)) {
mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP;
} else if (!strncmp(value, "right_side_up", delim - value)) {
mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP;
} else {
return -EINVAL;
}
return 0;
}
static int drm_mode_parse_cmdline_options(const char *str, bool freestanding, const struct drm_connector *connector,
struct drm_cmdline_mode *mode)
{
unsigned int deg, margin, rotation = 0;
const char *delim, *option, *sep;
option = str;
do {
delim = strchr(option, '=');
if (!delim) {
delim = strchr(option, ',');
if (!delim) {
delim = option + strlen(option);
}
}
if (!strncmp(option, "rotate", delim - option)) {
if (drm_mode_parse_cmdline_int(delim, °)) {
return -EINVAL;
}
switch (deg) {
case 0x0:
rotation |= DRM_MODE_ROTATE_0;
break;
case 0x5a:
rotation |= DRM_MODE_ROTATE_90;
break;
case 0xb4:
rotation |= DRM_MODE_ROTATE_180;
break;
case 0x10e:
rotation |= DRM_MODE_ROTATE_270;
break;
default:
return -EINVAL;
}
} else if (!strncmp(option, "reflect_x", delim - option)) {
rotation |= DRM_MODE_REFLECT_X;
} else if (!strncmp(option, "reflect_y", delim - option)) {
rotation |= DRM_MODE_REFLECT_Y;
} else if (!strncmp(option, "margin_right", delim - option)) {
if (drm_mode_parse_cmdline_int(delim, &margin)) {
return -EINVAL;
}
mode->tv_margins.right = margin;
} else if (!strncmp(option, "margin_left", delim - option)) {
if (drm_mode_parse_cmdline_int(delim, &margin)) {
return -EINVAL;
}
mode->tv_margins.left = margin;
} else if (!strncmp(option, "margin_top", delim - option)) {
if (drm_mode_parse_cmdline_int(delim, &margin)) {
return -EINVAL;
}
mode->tv_margins.top = margin;
} else if (!strncmp(option, "margin_bottom", delim - option)) {
if (drm_mode_parse_cmdline_int(delim, &margin)) {
return -EINVAL;
}
mode->tv_margins.bottom = margin;
} else if (!strncmp(option, "panel_orientation", delim - option)) {
if (drm_mode_parse_panel_orientation(delim, mode)) {
return -EINVAL;
}
} else {
return -EINVAL;
}
sep = strchr(delim, ',');
option = sep + 1;
} while (sep);
if (rotation && freestanding) {
return -EINVAL;
}
if (!(rotation & DRM_MODE_ROTATE_MASK)) {
rotation |= DRM_MODE_ROTATE_0;
}
if (!is_power_of_2(rotation & DRM_MODE_ROTATE_MASK)) {
return -EINVAL;
}
mode->rotation_reflection = rotation;
return 0;
}
static const char *const drm_named_modes_whitelist[] = {
"NTSC",
"PAL",
};
* 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]
*
* Additionals options can be provided following the mode, using a comma to
* separate each option. Valid options can be found in
* Documentation/fb/modedb.rst.
*
* 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, const struct drm_connector *connector,
struct drm_cmdline_mode *mode)
{
const char *name;
bool freestanding = false, parse_extras = false;
unsigned int bpp_off = 0, refresh_off = 0, options_off = 0;
unsigned int mode_end = 0;
const char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL;
const char *options_ptr = NULL;
char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL;
int i, len, ret;
memset(mode, 0, sizeof(*mode));
mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
if (!mode_option) {
return false;
}
name = mode_option;
bpp_ptr = strchr(name, '-');
if (bpp_ptr) {
bpp_off = bpp_ptr - name;
}
refresh_ptr = strchr(name, '@');
if (refresh_ptr) {
refresh_off = refresh_ptr - name;
}
options_ptr = strchr(name, ',');
if (options_ptr) {
options_off = options_ptr - name;
}
if (bpp_ptr) {
mode_end = bpp_off;
} else if (refresh_ptr) {
mode_end = refresh_off;
} else if (options_ptr) {
mode_end = options_off;
parse_extras = true;
} else {
mode_end = strlen(name);
parse_extras = true;
}
for (i = 0; i < ARRAY_SIZE(drm_named_modes_whitelist); i++) {
ret = str_has_prefix(name, drm_named_modes_whitelist[i]);
if (ret == mode_end) {
if (refresh_ptr) {
return false;
}
strcpy(mode->name, drm_named_modes_whitelist[i]);
mode->specified = true;
break;
}
}
if (!mode->specified && isdigit(name[0])) {
ret = drm_mode_parse_cmdline_res_mode(name, mode_end, parse_extras, connector, mode);
if (ret) {
return false;
}
mode->specified = true;
}
if (!mode->specified) {
unsigned int len_ex = strlen(mode_option);
if (bpp_ptr || refresh_ptr) {
return false;
}
if (len_ex == 1 || (len_ex >= 0x2 && mode_option[1] == ',')) {
extra_ptr = mode_option;
} else {
options_ptr = mode_option - 1;
}
freestanding = true;
}
if (bpp_ptr) {
ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode);
if (ret) {
return false;
}
mode->bpp_specified = true;
}
if (refresh_ptr) {
ret = drm_mode_parse_cmdline_refresh(refresh_ptr, &refresh_end_ptr, mode);
if (ret) {
return false;
}
mode->refresh_specified = true;
}
* Locate the end of the bpp / refresh, and parse the extras
* if relevant
*/
if (bpp_ptr && refresh_ptr) {
extra_ptr = max(bpp_end_ptr, refresh_end_ptr);
} else if (bpp_ptr) {
extra_ptr = bpp_end_ptr;
} else if (refresh_ptr) {
extra_ptr = refresh_end_ptr;
}
if (extra_ptr) {
if (options_ptr) {
len = options_ptr - extra_ptr;
} else {
len = strlen(extra_ptr);
}
ret = drm_mode_parse_cmdline_extra(extra_ptr, len, freestanding, connector, mode);
if (ret) {
return false;
}
}
if (options_ptr) {
ret = drm_mode_parse_cmdline_options(options_ptr + 1, freestanding, connector, mode);
if (ret) {
return false;
}
}
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 : 0x3c, cmd->rb,
cmd->interlace, cmd->margins);
} else {
mode = drm_gtf_mode(dev, cmd->xres, cmd->yres, cmd->refresh_specified ? cmd->refresh : 0x3c, cmd->interlace,
cmd->margins);
}
if (!mode) {
return NULL;
}
mode->type |= DRM_MODE_TYPE_USERDEF;
if (cmd->xres == 0x556) {
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)
{
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 = drm_mode_vrefresh(in);
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;
default:
WARN(1, "Invalid aspect ratio (0%x) on mode\n", in->picture_aspect_ratio);
fallthrough;
case HDMI_PICTURE_ASPECT_NONE:
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;
}
EXPORT_SYMBOL_GPL(drm_mode_convert_to_umode);
* 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->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;
* 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;
case DRM_MODE_FLAG_PIC_AR_NONE:
out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
break;
default:
return -EINVAL;
}
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;
}
EXPORT_SYMBOL_GPL(drm_mode_convert_umode);
* 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);