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drm/i915: Reject odd pipe source width with double wide/dual link

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In order to guarantee that pipe_src_w/h matches the user mode h/vdisplay
we must not adjust pipe_src_w to accommodate double wide/dual link.
Instead just reject the mode outright.

This will allows us to rely on crtc_state->mode for plane clipping.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171123190502.28449-2-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Ville Syrjälä 2017-11-23 21:04:48 +02:00
parent a63b8e7958
commit 0574bd882e
1 changed files with 12 additions and 3 deletions
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15
drivers/gpu/drm/i915/intel_display.c
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@ -6372,9 +6372,18 @@ static int intel_crtc_compute_config(struct intel_crtc *crtc,
* - LVDS dual channel mode
* - Double wide pipe
*/
if ((intel_crtc_has_type(pipe_config, INTEL_OUTPUT_LVDS) &&
intel_is_dual_link_lvds(dev)) || pipe_config->double_wide)
pipe_config->pipe_src_w &= ~1;
if (pipe_config->pipe_src_w & 1) {
if (pipe_config->double_wide) {
DRM_DEBUG_KMS("Odd pipe source width not supported with double wide pipe\n");
return -EINVAL;
}
if (intel_crtc_has_type(pipe_config, INTEL_OUTPUT_LVDS) &&
intel_is_dual_link_lvds(dev)) {
DRM_DEBUG_KMS("Odd pipe source width not supported with dual link LVDS\n");
return -EINVAL;
}
}
/* Cantiga+ cannot handle modes with a hsync front porch of 0.
* WaPruneModeWithIncorrectHsyncOffset:ctg,elk,ilk,snb,ivb,vlv,hsw.