Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755446Ab3HEUpx (ORCPT ); Mon, 5 Aug 2013 16:45:53 -0400 Received: from mail-wg0-f42.google.com ([74.125.82.42]:50945 "EHLO mail-wg0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753451Ab3HEUpt (ORCPT ); Mon, 5 Aug 2013 16:45:49 -0400 Date: Mon, 5 Aug 2013 22:45:54 +0200 From: Daniel Vetter To: Furquan Shaikh Cc: Jesse Barnes , Josh Triplett , Paulo Zanoni , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Ronald Minnich , Daniel Vetter Subject: Re: [Intel-gfx] [PATCH] drm/i915: add fast boot support for Haswell Message-ID: <20130805204554.GR22035@phenom.ffwll.local> Mail-Followup-To: Furquan Shaikh , Jesse Barnes , Josh Triplett , Paulo Zanoni , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Ronald Minnich , Daniel Vetter References: <1375391542-21936-1-git-send-email-furquan@google.com> <20130805072421.GV22035@phenom.ffwll.local> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Operating-System: Linux phenom 3.11.0-rc2+ User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5465 Lines: 139 [Now without the confidential header which shouldn't have spilled to public lists, please reply to this one here.] On Mon, Aug 05, 2013 at 01:24:15PM -0700, Furquan Shaikh wrote: > We tested the submitted patch on several systems here and it seems to be > working fine. So, I'm not sure I understand your comment. Can you please > provide more details? You check for the bit DP_PLL_FREQ_160MHZ in the register DP_A when calculating the reference frequence for port A eDP panels (i.e. the assignement of pipe_config->port_clock). This bit is valid on port A for ivb, snb & ilk, but not on hsw. Haswell has a complete new way for assigning the pll to the port. For solid fastboot support I think we need to support them all (i.e. also the hdmi wrpll clocks and while at it we might as well write the fdi dotclock readout code, it should be almost the same as the DP dotclock computation). -Daniel > > Thanks, > Furquan > > > On Mon, Aug 5, 2013 at 12:24 AM, Daniel Vetter wrote: > > > On Thu, Aug 01, 2013 at 02:12:22PM -0700, Furquan Shaikh wrote: > > > Enables getting correct mode clock when reading pipe config > > > > > > Signed-off-by: Furquan Shaikh > > > --- > > > drivers/gpu/drm/i915/intel_ddi.c | 8 ++++++++ > > > drivers/gpu/drm/i915/intel_display.c | 9 ++++++++- > > > 2 files changed, 16 insertions(+), 1 deletion(-) > > > > > > diff --git a/drivers/gpu/drm/i915/intel_ddi.c > > b/drivers/gpu/drm/i915/intel_ddi.c > > > index 931b4bb..fa0af9b 100644 > > > --- a/drivers/gpu/drm/i915/intel_ddi.c > > > +++ b/drivers/gpu/drm/i915/intel_ddi.c > > > @@ -1269,6 +1269,7 @@ static void intel_ddi_get_config(struct > > intel_encoder *encoder, > > > struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; > > > struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); > > > enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder; > > > + int port = intel_ddi_get_encoder_port(encoder); > > > u32 temp, flags = 0; > > > > > > temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder)); > > > @@ -1282,6 +1283,13 @@ static void intel_ddi_get_config(struct > > intel_encoder *encoder, > > > flags |= DRM_MODE_FLAG_NVSYNC; > > > > > > pipe_config->adjusted_mode.flags |= flags; > > > + > > > + if (port == PORT_A) { > > > + if ((I915_READ(DP_A) & DP_PLL_FREQ_MASK) == > > DP_PLL_FREQ_160MHZ) > > > + pipe_config->port_clock = 162000; > > > + else > > > + pipe_config->port_clock = 270000; > > > + } > > > > I don't think this works correctly since for DP we have new clocks on > > haswell, see intel_ddi_pll_mode_set. Also I think it'd be good to go right > > ahead and implement clock readout support for all hsw clock sources, not > > just DP. > > -Daniel > > > > > } > > > > > > static void intel_ddi_destroy(struct drm_encoder *encoder) > > > diff --git a/drivers/gpu/drm/i915/intel_display.c > > b/drivers/gpu/drm/i915/intel_display.c > > > index 3e66f05..681c99a 100644 > > > --- a/drivers/gpu/drm/i915/intel_display.c > > > +++ b/drivers/gpu/drm/i915/intel_display.c > > > @@ -7176,6 +7176,8 @@ static void i9xx_crtc_clock_get(struct intel_crtc > > *crtc, > > > pipe_config->pixel_multiplier; > > > } > > > > > > +#define div_ceil(A, B) ((A)/(B) + ((A)%(B) ? 1 : 0)) > > > + > > > static void ironlake_crtc_clock_get(struct intel_crtc *crtc, > > > struct intel_crtc_config *pipe_config) > > > { > > > @@ -7218,7 +7220,11 @@ static void ironlake_crtc_clock_get(struct > > intel_crtc *crtc, > > > return; > > > > > > clock = ((u64)link_m * (u64)link_freq * (u64)repeat); > > > - do_div(clock, link_n); > > > + /* This is required because the value comes out to be in fraction > > > + (eg. 70699.54). Need to round it up since values are compared in > > > + drm_mode_equal > > > + */ > > > + clock = div_ceil(clock, link_n); > > > > > > pipe_config->adjusted_mode.clock = clock; > > > } > > > @@ -9588,6 +9594,7 @@ static void intel_init_display(struct drm_device > > *dev) > > > > > > if (HAS_DDI(dev)) { > > > dev_priv->display.get_pipe_config = > > haswell_get_pipe_config; > > > + dev_priv->display.get_clock = ironlake_crtc_clock_get; > > > dev_priv->display.crtc_mode_set = haswell_crtc_mode_set; > > > dev_priv->display.crtc_enable = haswell_crtc_enable; > > > dev_priv->display.crtc_disable = haswell_crtc_disable; > > > -- > > > 1.8.3 > > > > > > _______________________________________________ > > > dri-devel mailing list > > > dri-devel@lists.freedesktop.org > > > http://lists.freedesktop.org/mailman/listinfo/dri-devel > > > > -- > > Daniel Vetter > > Software Engineer, Intel Corporation > > +41 (0) 79 365 57 48 - http://blog.ffwll.ch > > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/