From patchwork Thu Aug 11 09:11:25 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Zabel X-Patchwork-Id: 9274721 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 224E660780 for ; Thu, 11 Aug 2016 09:11:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0F4AE28458 for ; Thu, 11 Aug 2016 09:11:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0325228595; Thu, 11 Aug 2016 09:11:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 7542928458 for ; Thu, 11 Aug 2016 09:11:52 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bXm1o-0003p3-4T; Thu, 11 Aug 2016 09:11:52 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bXm1l-0003jI-V7 for linux-mediatek@lists.infradead.org; Thu, 11 Aug 2016 09:11:50 +0000 Received: from paszta.hi.pengutronix.de ([2001:67c:670:100:96de:80ff:fec2:9969] helo=paszta) by metis.ext.pengutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1bXm1N-0002aR-G3; Thu, 11 Aug 2016 11:11:25 +0200 Message-ID: <1470906685.2493.34.camel@pengutronix.de> Subject: [PATCH v4.5 3/4] drm/mediatek: Add gamma correction. From: Philipp Zabel To: Bibby Hsieh Date: Thu, 11 Aug 2016 11:11:25 +0200 In-Reply-To: <1469672575-5847-4-git-send-email-bibby.hsieh@mediatek.com> References: <1469672575-5847-1-git-send-email-bibby.hsieh@mediatek.com> <1469672575-5847-4-git-send-email-bibby.hsieh@mediatek.com> X-Mailer: Evolution 3.12.9-1+b1 Mime-Version: 1.0 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-mediatek@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160811_021150_189089_4C90E1BD X-CRM114-Status: GOOD ( 15.27 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, David Airlie , Daniel Vetter , Cawa Cheng , dri-devel@lists.freedesktop.org, Mao Huang , YT Shen , CK Hu , Thierry Reding , linux-mediatek@lists.infradead.org, Sascha Hauer , Matthias Brugger , Yingjoe Chen , linux-arm-kernel@lists.infradead.org Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From 2f3f4dda747c0619594d13996e65598ab675c60c Mon Sep 17 00:00:00 2001 From: Bibby Hsieh Date: Thu, 28 Jul 2016 10:22:54 +0800 Subject: [PATCH] drm/mediatek: Add gamma correction. 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 Signed-off-by: Philipp Zabel --- I have applied this patch with one change from v4: - Use drm_crtc_enable_color_mgmt instead of drm_crtc_helper_enable_color_mgmt --- drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 7 ++++++- 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, 48 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..e3ac280 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 +572,8 @@ 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_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, MTK_LUT_SIZE); priv->crtc[pipe] = &mtk_crtc->base; priv->num_pipes++; diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h index 81e5566..d332564 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h @@ -19,6 +19,7 @@ #include "mtk_drm_plane.h" #define OVL_LAYER_NR 4 +#define MTK_LUT_SIZE 512 int mtk_drm_crtc_enable_vblank(struct drm_device *drm, unsigned int pipe); void mtk_drm_crtc_disable_vblank(struct drm_device *drm, unsigned int pipe); diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c index ba895c8..42cd587 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c @@ -24,6 +24,7 @@ #include "mtk_drm_drv.h" #include "mtk_drm_plane.h" #include "mtk_drm_ddp_comp.h" +#include "mtk_drm_crtc.h" #define DISP_OD_EN 0x0000 #define DISP_OD_INTEN 0x0008 @@ -42,7 +43,11 @@ #define DISP_AAL_SIZE 0x0030 #define DISP_GAMMA_EN 0x0000 +#define DISP_GAMMA_CFG 0x0020 #define DISP_GAMMA_SIZE 0x0030 +#define DISP_GAMMA_LUT 0x0700 + +#define LUT_10BIT_MASK 0x03ff #define OD_RELAY_MODE BIT(0) @@ -54,6 +59,7 @@ #define AAL_EN BIT(0) #define GAMMA_EN BIT(0) +#define GAMMA_LUT_EN BIT(1) static void mtk_color_config(struct mtk_ddp_comp *comp, unsigned int w, unsigned int h, unsigned int vrefresh) @@ -118,13 +124,38 @@ static void mtk_gamma_stop(struct mtk_ddp_comp *comp) writel_relaxed(0x0, comp->regs + DISP_GAMMA_EN); } +static void mtk_gamma_set(struct mtk_ddp_comp *comp, + struct drm_crtc_state *state) +{ + unsigned int i, reg; + struct drm_color_lut *lut; + void __iomem *lut_base; + u32 word; + + if (state->gamma_lut) { + reg = readl(comp->regs + DISP_GAMMA_CFG); + reg = reg | GAMMA_LUT_EN; + writel(reg, comp->regs + DISP_GAMMA_CFG); + lut_base = comp->regs + DISP_GAMMA_LUT; + lut = (struct drm_color_lut *)state->gamma_lut->data; + for (i = 0; i < MTK_LUT_SIZE; i++) { + word = (((lut[i].red >> 6) & LUT_10BIT_MASK) << 20) + + (((lut[i].green >> 6) & LUT_10BIT_MASK) << 10) + + ((lut[i].blue >> 6) & LUT_10BIT_MASK); + writel(word, (lut_base + i * 4)); + } + } +} + static const struct mtk_ddp_comp_funcs ddp_aal = { + .gamma_set = mtk_gamma_set, .config = mtk_aal_config, .start = mtk_aal_start, .stop = mtk_aal_stop, }; static const struct mtk_ddp_comp_funcs ddp_gamma = { + .gamma_set = mtk_gamma_set, .config = mtk_gamma_config, .start = mtk_gamma_start, .stop = mtk_gamma_stop, diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h index 6b13ba9..f4b7e0a 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h @@ -21,6 +21,7 @@ struct device_node; struct drm_crtc; struct drm_device; struct mtk_plane_state; +struct drm_crtc_state; enum mtk_ddp_comp_type { MTK_DISP_OVL, @@ -73,6 +74,8 @@ struct mtk_ddp_comp_funcs { void (*layer_off)(struct mtk_ddp_comp *comp, unsigned int idx); void (*layer_config)(struct mtk_ddp_comp *comp, unsigned int idx, struct mtk_plane_state *state); + void (*gamma_set)(struct mtk_ddp_comp *comp, + struct drm_crtc_state *state); }; struct mtk_ddp_comp { @@ -139,6 +142,13 @@ static inline void mtk_ddp_comp_layer_config(struct mtk_ddp_comp *comp, comp->funcs->layer_config(comp, idx, state); } +static inline void mtk_ddp_gamma_set(struct mtk_ddp_comp *comp, + struct drm_crtc_state *state) +{ + if (comp->funcs && comp->funcs->gamma_set) + comp->funcs->gamma_set(comp, state); +} + int mtk_ddp_comp_get_id(struct device_node *node, enum mtk_ddp_comp_type comp_type); int mtk_ddp_comp_init(struct device *dev, struct device_node *comp_node,