Making sure that the mode-clock is not greater than the max_dot_clock freq.This patch will prevent attempts from userspace to modeset with mode->clock greater than max_dot_clock freq. Signed-off-by: Nischal Varide <nischal.varide@xxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_dp.c | 10 ++++++++++ drivers/gpu/drm/i915/display/intel_hdmi.c | 3 +++ 2 files changed, 13 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 7400d6b4c587..e603b7c01d27 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -2045,6 +2045,16 @@ intel_dp_compute_config(struct intel_encoder *encoder, if (intel_dp_hdisplay_bad(dev_priv, adjusted_mode->crtc_hdisplay)) return -EINVAL; + if (!intel_dp_can_bigjoiner(intel_dp) && + (adjusted_mode->clock > dev_priv->max_dotclk_freq)) + return -EINVAL; + + if (intel_dp_can_bigjoiner(intel_dp) && + (adjusted_mode->clock > (2 * dev_priv->max_dotclk_freq))) + return -EINVAL; + + + /* * Try to respect downstream TMDS clock limits first, if * that fails assume the user might know something we don't. diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c index 02f8374ea51f..50603806a964 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.c +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c @@ -2247,6 +2247,9 @@ int intel_hdmi_compute_config(struct intel_encoder *encoder, if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) return -EINVAL; + if (adjusted_mode->clock > dev_priv->max_dotclk_freq) + return -EINVAL; + pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; pipe_config->has_hdmi_sink = intel_has_hdmi_sink(intel_hdmi, conn_state); -- 2.36.0
