gpu/drm/drm_modes.c

11  * to deal in the Software without restriction, including without limitation
16  * The above copyright notice and this permission notice shall be included in
27  * Except as contained in this notice, the name of the copyright holder(s)
28  * and author(s) shall not be used in advertising or otherwise to promote
29  * the sale, use or other dealings in this Software without prior written
108  * then in a second step get filtered and all the modes actually supported by
302 			   * pulses, consisting in 5 short sync pulses
310 			   * In interlace, the even field is in the
319 			   * can't be in either the front porch or sync
528  * @pixel_clock_hz: Pixel Clock Frequency, in Hertz
613  * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c.
617  * The modeline based on the CVT algorithm stored in a drm_display_mode object.
727 		/* 9. Find number of lines in sync + backporch */
732 		/* 10. Find number of lines in back porch */
784 		/* 9. Find number of lines in vertical blanking */
789 		/* 11. Find total number of lines in vertical field */
791 		/* 12. Find total number of pixels in a line */
793 		/* Fill in HSync values */
796 		/* Fill in VSync values */
801 	tmp = drm_mode->htotal; /* perform intermediate calcs in u64 */
838  * GTF feature blocks specify C and J in multiples of 0.5, so we pass them
839  * in here multiplied by two.  For a C of 40, pass in 80.
842  * The modeline based on the full GTF algorithm stored in a drm_display_mode object.
856 	/* width of vsync in lines */
910 	/* 4. Find number of lines in Top margin: */
915 	/* 5. Find number of lines in bottom margin: */
932 	/* 8. Find the number of lines in V sync + back porch */
936 	/*  9. Find the number of lines in V back porch alone: */
938 	/*  10. Find the total number of lines in Vertical field period: */
953 	/*  15. Find number of pixels in left margin: */
960 	/* 16.Find number of pixels in right margin: */
962 	/* 17.Find total number of active pixels in image and left and right */
967 	/* 19.Find the number of pixels in the blanking time to the nearest
981 	/* 17. Find the number of pixels in the horizontal sync period: */
985 	/* 18. Find the number of pixels in horizontal front porch period */
987 	/*  36. Find the number of lines in the odd front porch period: */
990 	/* finally, pack the results in the mode struct */
1036  * I also refer to the function of fb_get_mode in the file of
1047  * The modeline based on the GTF algorithm stored in a drm_display_mode object.
1063  * drm_display_mode_from_videomode - fill in @dmode using @vm,
1067  * Fills out @dmode using the display mode specified in @vm.
1104  * drm_display_mode_to_videomode - fill in @vm using @dmode,
1108  * Fills out @vm using the display mode specified in @dmode.
1145  * DE polarity from videomode and store it in a separate variable
1151  * and DISPLAY_FLAGS_SYNC_(POS|NEG)EDGE in @bus_flags according to DISPLAY_FLAGS
1152  * found in @vm
1180  * @index: index into the list of display timings in devicetree
1263  * @mode: name will be set in this mode
1283  * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the
1310  * @hdisplay: hdisplay value to fill in
1311  * @vdisplay: vdisplay value to fill in
1433  * garbage in on-stack modes.
1908 			 * preferred (in case the match isn't 100%). If
2295 	 * If there's an equal sign in the name, the command-line
2348  * separate each option. Valid options can be found in
2573  * @in: drm_display_mode to use
2579 			       const struct drm_display_mode *in)
2581 	out->clock = in->clock;
2582 	out->hdisplay = in->hdisplay;
2583 	out->hsync_start = in->hsync_start;
2584 	out->hsync_end = in->hsync_end;
2585 	out->htotal = in->htotal;
2586 	out->hskew = in->hskew;
2587 	out->vdisplay = in->vdisplay;
2588 	out->vsync_start = in->vsync_start;
2589 	out->vsync_end = in->vsync_end;
2590 	out->vtotal = in->vtotal;
2591 	out->vscan = in->vscan;
2592 	out->vrefresh = drm_mode_vrefresh(in);
2593 	out->flags = in->flags;
2594 	out->type = in->type;
2596 	switch (in->picture_aspect_ratio) {
2611 		     in->picture_aspect_ratio);
2618 	strscpy_pad(out->name, in->name, sizeof(out->name));
2625  * @in: drm_mode_modeinfo to use
2635 			   const struct drm_mode_modeinfo *in)
2637 	if (in->clock > INT_MAX || in->vrefresh > INT_MAX)
2640 	out->clock = in->clock;
2641 	out->hdisplay = in->hdisplay;
2642 	out->hsync_start = in->hsync_start;
2643 	out->hsync_end = in->hsync_end;
2644 	out->htotal = in->htotal;
2645 	out->hskew = in->hskew;
2646 	out->vdisplay = in->vdisplay;
2647 	out->vsync_start = in->vsync_start;
2648 	out->vsync_end = in->vsync_end;
2649 	out->vtotal = in->vtotal;
2650 	out->vscan = in->vscan;
2651 	out->flags = in->flags;
2658 	out->type = in->type & DRM_MODE_TYPE_ALL;
2659 	strscpy_pad(out->name, in->name, sizeof(out->name));
2662 	 * as the aspect-ratio information is not stored in
2663 	 * flags for kernel-mode, but in picture_aspect_ratio.
2667 	switch (in->flags & DRM_MODE_FLAG_PIC_AR_MASK) {
2697  * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420
2704  * true if the mode can be supported in YCBCR420 format
2717  * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420
2736  * drm_mode_is_420 - if a given videomode can be supported in YCBCR420
2743  * true if the mode can be supported in YCBCR420 format