On devices with a burst_mode_ratio which is not 100 (1:1), the pclk will have a different value then drm_display_mode.clock .
On a Prowise PT301 tablet where vbt.lfp_lvds_vbt_mode.clock is 66100 and burst_mode_ratio is 130 this leads to the following errors:
[drm:pipe_config_err [i915]] *ERROR* mismatch in pixel_rate (expected 66100, found 86458) [drm:pipe_config_err [i915]] *ERROR* mismatch in base.adjusted_mode.crtc_clock (expected 66100, found 86458) [drm:pipe_config_err [i915]] *ERROR* mismatch in port_clock (expected 66100, found 86458)
This commit makes intel_dsi_compute_config() set pipe_config.adjusted_mode.crtc_clock, taking the burst_mode_ratio into account fixing this.
Signed-off-by: Hans de Goede hdegoede@redhat.com --- drivers/gpu/drm/i915/vlv_dsi.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/vlv_dsi.c b/drivers/gpu/drm/i915/vlv_dsi.c index c21cbfa9653c..d72ccf557a9c 100644 --- a/drivers/gpu/drm/i915/vlv_dsi.c +++ b/drivers/gpu/drm/i915/vlv_dsi.c @@ -347,6 +347,10 @@ static bool intel_dsi_compute_config(struct intel_encoder *encoder, return false; }
+ adjusted_mode->crtc_clock = + DIV_ROUND_UP(adjusted_mode->crtc_clock * + intel_dsi->burst_mode_ratio, 100); + pipe_config->clock_set = true;
return true;