From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932680AbcHKHvn (ORCPT ); Thu, 11 Aug 2016 03:51:43 -0400 Received: from metis.ext.4.pengutronix.de ([92.198.50.35]:54605 "EHLO metis.ext.4.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752302AbcHKHvm (ORCPT ); Thu, 11 Aug 2016 03:51:42 -0400 Message-ID: <1470901876.2493.24.camel@pengutronix.de> Subject: Re: [PATCH v4 3/4] drm/mediatek: Add gamma correction. From: Philipp Zabel To: Ville =?ISO-8859-1?Q?Syrj=E4l=E4?= Cc: Bibby Hsieh , linux-kernel@vger.kernel.org, Daniel Vetter , Cawa Cheng , dri-devel@lists.freedesktop.org, Mao Huang , linux-mediatek@lists.infradead.org, Sascha Hauer , Matthias Brugger , Yingjoe Chen , linux-arm-kernel@lists.infradead.org Date: Thu, 11 Aug 2016 09:51:16 +0200 In-Reply-To: <20160811074410.GF4329@intel.com> References: <1469672575-5847-1-git-send-email-bibby.hsieh@mediatek.com> <1469672575-5847-4-git-send-email-bibby.hsieh@mediatek.com> <1470900779.2493.20.camel@pengutronix.de> <20160811074410.GF4329@intel.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.12.9-1+b1 Mime-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 2001:67c:670:100:96de:80ff:fec2:9969 X-SA-Exim-Mail-From: p.zabel@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Donnerstag, den 11.08.2016, 10:44 +0300 schrieb Ville Syrjälä: > On Thu, Aug 11, 2016 at 09:32:59AM +0200, Philipp Zabel wrote: > > Am Donnerstag, den 28.07.2016, 10:22 +0800 schrieb Bibby Hsieh: > > > Add gamma set function to correct brightness values. > > > It applies arbitrary mapping curve to compensate the > > > incorrect transfer function of the panel. > > > > > > Signed-off-by: Bibby Hsieh > > > --- > > > drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 8 ++++++- > > > drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 1 + > > > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 31 +++++++++++++++++++++++++++ > > > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 10 +++++++++ > > > 4 files changed, 49 insertions(+), 1 deletion(-) > > > > > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > > > index 24aa3ba..cbb460a5 100644 > > > --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > > > +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > > > @@ -409,6 +409,9 @@ static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc, > > > } > > > if (pending_planes) > > > mtk_crtc->pending_planes = true; > > > + if (crtc->state->color_mgmt_changed) > > > + for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) > > > + mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i], crtc->state); > > > } > > > > > > static const struct drm_crtc_funcs mtk_crtc_funcs = { > > > @@ -418,6 +421,7 @@ static const struct drm_crtc_funcs mtk_crtc_funcs = { > > > .reset = mtk_drm_crtc_reset, > > > .atomic_duplicate_state = mtk_drm_crtc_duplicate_state, > > > .atomic_destroy_state = mtk_drm_crtc_destroy_state, > > > + .gamma_set = drm_atomic_helper_legacy_gamma_set, > > > }; > > > > > > static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = { > > > @@ -568,7 +572,9 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev, > > > &mtk_crtc->planes[1].base, pipe); > > > if (ret < 0) > > > goto unprepare; > > > - > > > + drm_mode_crtc_set_gamma_size(&mtk_crtc->base, MTK_LUT_SIZE); > > > + drm_helper_crtc_enable_color_mgmt(&mtk_crtc->base, MTK_LUT_SIZE, > > > + MTK_LUT_SIZE); > > > > I have applied all four patches and rebased onto v4.8-rc1, replacing > > drm_helper_crtc_enable_color_mgmt with: > > > > drm_crtc_enable_color_mgmt(&mtk_crtc->base, MTK_LUT_SIZE, > > true, MTK_LUT_SIZE); > > BTW that looks wrong (already in the original). AFAICS the patch just > handled the gamma_lut, not the degamma_lut, so telling you have both > is not right. Thanks, so should that be drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, MTK_LUT_SIZE); instead, since we only handle gamma? regards Philipp