From d28a8803ab0325393fd5c2507f5e3dd5064df2b7 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Mon, 21 May 2012 18:54:41 +0200 Subject: [PATCH] drm/i915: reject doubleclocked cea modes on dp These are ultra-low-res modes used to upscale SDTV content and we don't know how to support these on dp on intel hw: - It's unclear whether we can send avi infoframes over dp ports. - And the pixel repeat setting that work for hdmi/sdvo explicitly don't work for dp. So don't bother and just reject these modes. These modes have been introduced in commit 54ac76f851a1789b047b74a8e14980f2dd1ac749 Author: Christian Schmidt Date: Mon Dec 19 14:53:16 2011 +0000 drm/edid: support CEA video modes. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=45729 Signed-Off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_dp.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index a1a5ce7..736a3c8 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -266,6 +266,9 @@ intel_dp_mode_valid(struct drm_connector *connector, if (mode->clock < 10000) return MODE_CLOCK_LOW; + if (mode->flags & DRM_MODE_FLAG_DBLCLK) + return MODE_H_ILLEGAL; + return MODE_OK; } @@ -702,6 +705,9 @@ intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode, mode->clock = intel_dp->panel_fixed_mode->clock; } + if (mode->flags & DRM_MODE_FLAG_DBLCLK) + return false; + DRM_DEBUG_KMS("DP link computation with max lane count %i " "max bw %02x pixel clock %iKHz\n", max_lane_count, bws[max_clock], mode->clock); -- 1.7.10