From: Ville Syrjälä <ville.syrj...@linux.intel.com>
Reject the modeset if the requested dotclock exceeds the maximum allowed
by the hardware. So far we've only checked this on gen2/3 while also
handling the double wide vs. single wide pipe selection. Extend the
check to all platforms since we have the max dotclock correctly
populated now across the board.
Testcase: igt/kms_invalid_dotclock
Cc: Mika Kahola <mika.kah...@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 1e5138497e6a..adb489508f25 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6510,10 +6510,10 @@ static int intel_crtc_compute_config(struct intel_crtc
*crtc,
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
const struct drm_display_mode *adjusted_mode =
&pipe_config->base.adjusted_mode;
+ int clock_limit = dev_priv->max_dotclk_freq;
- /* FIXME should check pixel clock limits on all platforms */
if (INTEL_INFO(dev)->gen < 4) {
- int clock_limit = dev_priv->max_cdclk_freq * 9 / 10;
+ clock_limit = dev_priv->max_cdclk_freq * 9 / 10;
/*
* Enable double wide mode when the dot clock
@@ -6521,16 +6521,16 @@ static int intel_crtc_compute_config(struct intel_crtc
*crtc,
*/
if (intel_crtc_supports_double_wide(crtc) &&
adjusted_mode->crtc_clock > clock_limit) {
- clock_limit *= 2;
+ clock_limit = dev_priv->max_dotclk_freq;
pipe_config->double_wide = true;
}
+ }
- if (adjusted_mode->crtc_clock > clock_limit) {
- DRM_DEBUG_KMS("requested pixel clock (%d kHz) too high
(max: %d kHz, double wide: %s)\n",
- adjusted_mode->crtc_clock, clock_limit,
- yesno(pipe_config->double_wide));
- return -EINVAL;
- }
+ if (adjusted_mode->crtc_clock > clock_limit) {
+ DRM_DEBUG_KMS("requested pixel clock (%d kHz) too high (max: %d
kHz, double wide: %s)\n",
+ adjusted_mode->crtc_clock, clock_limit,
+ yesno(pipe_config->double_wide));
+ return -EINVAL;
}
/*
--
2.7.4
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