It is possible the we request to have a mode that has higher pixel clock than our HW can support. This patch checks if requested pixel clock is lower than the one supported by the HW. The requested mode is discarded if we cannot support the requested pixel clock. This patch applies to HDMI. V2: - removed computation for max dot clock V3: - cleanup by removing unnecessary lines Signed-off-by: Mika Kahola <mika.kahola@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_hdmi.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index 70bad5b..3149e5f 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -1193,10 +1193,14 @@ intel_hdmi_mode_valid(struct drm_connector *connector, struct drm_device *dev = intel_hdmi_to_dev(hdmi); enum drm_mode_status status; int clock; + int max_pixclk = to_i915(connector->dev)->max_dotclk; if (mode->flags & DRM_MODE_FLAG_DBLSCAN) return MODE_NO_DBLESCAN; + if (mode->clock > max_pixclk) + return MODE_CLOCK_HIGH; + clock = mode->clock; if (mode->flags & DRM_MODE_FLAG_DBLCLK) clock *= 2; -- 1.9.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
