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.var...@intel.com>
---
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
