| 8,6 → 8,8 |
|---|
| * 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"), |
| 33,12 → 35,11 |
|---|
| * authorization from the copyright holder(s) and author(s). |
| */ |
| |
| #include <list.h> |
| #include <linux/list.h> |
| #include "drmP.h" |
| #include "drm.h" |
| #include "drm_crtc.h" |
| |
| #define DRM_MODESET_DEBUG "drm_mode" |
| /** |
| * drm_mode_debug_printmodeline - debug print a mode |
| * @dev: DRM device |
| 51,8 → 52,8 |
|---|
| */ |
| void drm_mode_debug_printmodeline(struct drm_display_mode *mode) |
| { |
| DRM_DEBUG_MODE(DRM_MODESET_DEBUG, |
| "Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n", |
| DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d " |
| "0x%x 0x%x\n", |
| mode->base.id, mode->name, mode->vrefresh, mode->clock, |
| mode->hdisplay, mode->hsync_start, |
| mode->hsync_end, mode->htotal, |
| 62,6 → 63,420 |
|---|
| EXPORT_SYMBOL(drm_mode_debug_printmodeline); |
| |
| /** |
| * drm_cvt_mode -create a modeline based on CVT algorithm |
| * @dev: DRM device |
| * @hdisplay: hdisplay size |
| * @vdisplay: vdisplay size |
| * @vrefresh : vrefresh rate |
| * @reduced : Whether the GTF calculation is simplified |
| * @interlaced:Whether the interlace is supported |
| * |
| * LOCKING: |
| * none. |
| * |
| * return the modeline based on CVT algorithm |
| * |
| * 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.vesa.org/public/CVT/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. |
| */ |
| #define HV_FACTOR 1000 |
| struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, |
| int vdisplay, int vrefresh, |
| bool reduced, bool interlaced) |
| { |
| /* 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; |
| bool margins = false; |
| unsigned int vfieldrate, hperiod; |
| int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; |
| int interlace; |
| |
| /* 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 pixes 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; |
| } |
| /* 15/13. Find pixel clock frequency (kHz for xf86) */ |
| drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod; |
| drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP; |
| /* 18/16. Find actual vertical frame frequency */ |
| /* ignore - just set the mode flag for interlaced */ |
| if (interlaced) |
| drm_mode->vtotal *= 2; |
| /* 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); |
| if (interlaced) |
| drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; |
| |
| return drm_mode; |
| } |
| EXPORT_SYMBOL(drm_cvt_mode); |
| |
| /** |
| * drm_gtf_mode - create the modeline based on GTF algorithm |
| * |
| * @dev :drm device |
| * @hdisplay :hdisplay size |
| * @vdisplay :vdisplay size |
| * @vrefresh :vrefresh rate. |
| * @interlaced :whether the interlace is supported |
| * @margins :whether the margin is supported |
| * |
| * LOCKING. |
| * none. |
| * |
| * 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 |
| */ |
| struct drm_display_mode *drm_gtf_mode(struct drm_device *dev, int hdisplay, |
| int vdisplay, int vrefresh, |
| bool interlaced, int margins) |
| { |
| /* 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 |
| /* blanking formula gradient */ |
| #define GTF_M 600 |
| /* blanking formula offset */ |
| #define GTF_C 40 |
| /* blanking formula scaling factor */ |
| #define GTF_K 128 |
| /* blanking formula scaling factor */ |
| #define GTF_J 20 |
| /* C' and M' are part of the Blanking Duty Cycle computation */ |
| #define GTF_C_PRIME (((GTF_C - GTF_J) * GTF_K / 256) + GTF_J) |
| #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; |
| |
| drm_mode_set_name(drm_mode); |
| drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; |
| |
| if (interlaced) { |
| drm_mode->vtotal *= 2; |
| drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; |
| } |
| |
| return drm_mode; |
| } |
| EXPORT_SYMBOL(drm_gtf_mode); |
| /** |
| * drm_mode_set_name - set the name on a mode |
| * @mode: name will be set in this mode |
| * |
| 151,7 → 566,9 |
|---|
| * FIXME: why is this needed? shouldn't vrefresh be set already? |
| * |
| * RETURNS: |
| * Vertical refresh rate of @mode x 1000. For precision reasons. |
| * Vertical refresh rate. It will be the result of actual value plus 0.5. |
| * If it is 70.288, it will return 70Hz. |
| * If it is 59.6, it will return 60Hz. |
| */ |
| int drm_mode_vrefresh(struct drm_display_mode *mode) |
| { |
| 161,14 → 578,13 |
|---|
| if (mode->vrefresh > 0) |
| refresh = mode->vrefresh; |
| else if (mode->htotal > 0 && mode->vtotal > 0) { |
| int vtotal; |
| vtotal = mode->vtotal; |
| /* work out vrefresh the value will be x1000 */ |
| calc_val = (mode->clock * 1000); |
| |
| calc_val /= mode->htotal; |
| calc_val *= 1000; |
| calc_val /= mode->vtotal; |
| refresh = (calc_val + vtotal / 2) / vtotal; |
| |
| refresh = calc_val; |
| if (mode->flags & DRM_MODE_FLAG_INTERLACE) |
| refresh *= 2; |
| if (mode->flags & DRM_MODE_FLAG_DBLSCAN) |
| 403,8 → 819,7 |
|---|
| list_del(&mode->head); |
| if (verbose) { |
| drm_mode_debug_printmodeline(mode); |
| DRM_DEBUG_MODE(DRM_MODESET_DEBUG, |
| "Not using %s mode %d\n", |
| DRM_DEBUG_KMS("Not using %s mode %d\n", |
| mode->name, mode->status); |
| } |
| drm_mode_destroy(dev, mode); |
| 566,6 → 981,8 |
|---|
| found_it = 1; |
| /* if equal delete the probed mode */ |
| mode->status = pmode->status; |
| /* Merge type bits together */ |
| mode->type |= pmode->type; |
| list_del(&pmode->head); |
| drm_mode_destroy(connector->dev, pmode); |
| break; |