From 8bf42225dac865665a5a0f8bbe1b62139470ffa0 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Fri, 27 Jan 2012 22:40:51 +0100 Subject: [PATCH] drm/modes: do not enforce an odd vtotal for interlaced modes CEA actually specifies an interlaced mode with even vtotal and supplies a diagram showing how this is supposed to work. Note that interlaced modes with an even vtotal seem to be a fairly recent invention. All modelines lore I could dig up with googling says that vtotal for interlaced modes _needs_ to be odd. But the even modelines in CEA are not a spec-bug, there's a figure in CEA-861-E called "Figure 5 Special Interlaced Video Format Timing (Even Vtotal)" that explains how it's supposed to work. Furthermore intel Bspec explicitly mentions that both odd and even interlaced vtotal are supported (VTOTAL register in the south display engine of PCH split chips). Acked-by: Adam Jackson Signed-Off-by: Daniel Vetter Signed-off-by: Dave Airlie --- drivers/gpu/drm/drm_modes.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index fb8e46b4e8bc..7ff13bc47ca2 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -686,8 +686,6 @@ void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) p->crtc_vsync_end /= 2; p->crtc_vtotal /= 2; } - - p->crtc_vtotal |= 1; } if (p->flags & DRM_MODE_FLAG_DBLSCAN) { -- 2.30.2