From: Jesse Barnes Date: Fri, 20 Dec 2013 21:08:00 +0000 (-0800) Subject: drm/i915: use crtc_htotal when calculating ilk watermarks X-Git-Tag: next-20140109~53^2~2 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=576b259e65baf15f691010353f6ab06f7190c33f;p=karo-tx-linux.git drm/i915: use crtc_htotal when calculating ilk watermarks This was introduced in: commit 7c4a395ff8f441acb7876281c6777624e6410349 Author: Ville Syrjälä Date: Wed Oct 9 19:17:56 2013 +0300 drm/i915: Don't re-compute pipe watermarks except for the affected pipe and I missed fixing it in: commit fec8cba306f974f3a4491176994de5d821273643 Author: Jesse Barnes Date: Wed Nov 27 11:10:26 2013 -0800 drm/i915: use crtc_htotal in watermark calculations to match fastboot v2 It's needed for ILK+ platforms to fastboot without crashing on a divide by 0 after a DPMS on action. Note: Ville mentioned in his review that this confusion seems to go down to the original introduction of this code in commit 801bcfffbb0721d7131e930f9a46103e539c43a4 Author: Paulo Zanoni Date: Fri May 31 10:08:35 2013 -0300 drm/i915: properly set HSW WM_PIPE registers So it seems to have been missed both in the fastboot patch and in the 3d mode suppport (where only crtc_htotal reflects the real pipe width). Signed-off-by: Jesse Barnes Reviewed-by: Ville Syrjälä [danvet: Add note based on Ville's review.] Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 743449a51be8..534459944d70 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -2123,7 +2123,7 @@ static void ilk_compute_wm_parameters(struct drm_crtc *crtc, p->active = intel_crtc_active(crtc); if (p->active) { - p->pipe_htotal = intel_crtc->config.adjusted_mode.htotal; + p->pipe_htotal = intel_crtc->config.adjusted_mode.crtc_htotal; p->pixel_rate = ilk_pipe_pixel_rate(dev, crtc); p->pri.bytes_per_pixel = crtc->fb->bits_per_pixel / 8; p->cur.bytes_per_pixel = 4;