From patchwork Thu May 29 12:48:05 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrzej Hajda X-Patchwork-Id: 4264161 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 496359F333 for ; Thu, 29 May 2014 12:49:13 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6ECB220340 for ; Thu, 29 May 2014 12:49:11 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 46784202F8 for ; Thu, 29 May 2014 12:49:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4711F6E393; Thu, 29 May 2014 05:49:07 -0700 (PDT) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mailout1.w1.samsung.com (mailout1.w1.samsung.com [210.118.77.11]) by gabe.freedesktop.org (Postfix) with ESMTP id 75AD56E393 for ; Thu, 29 May 2014 05:49:05 -0700 (PDT) Received: from eucpsbgm2.samsung.com (unknown [203.254.199.245]) by mailout1.w1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N6C00A5L69NSD10@mailout1.w1.samsung.com> for dri-devel@lists.freedesktop.org; Thu, 29 May 2014 13:48:59 +0100 (BST) X-AuditID: cbfec7f5-b7f626d000004b39-99-53872cbe5f28 Received: from eusync4.samsung.com ( [203.254.199.214]) by eucpsbgm2.samsung.com (EUCPMTA) with SMTP id F0.DE.19257.EBC27835; Thu, 29 May 2014 13:49:02 +0100 (BST) Received: from AMDC1061.digital.local ([106.116.147.88]) by eusync4.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0N6C0040968YLH90@eusync4.samsung.com>; Thu, 29 May 2014 13:49:02 +0100 (BST) From: Andrzej Hajda To: Thierry Reding Subject: [PATCH] drm/panel/s6e8aa0: add backlight support Date: Thu, 29 May 2014 14:48:05 +0200 Message-id: <1401367685-22528-1-git-send-email-a.hajda@samsung.com> X-Mailer: git-send-email 1.9.1 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrHJMWRmVeSWpSXmKPExsVy+t/xa7r7dNqDDWa3sFjcWneO1aL33Ekm iytf37NZXN41h81ixvl9TBZrj9xlt/i5ax6LA7vHzll32T22f3vA6nG/+ziTR9+WVYwenzfJ BbBGcdmkpOZklqUW6dslcGV0XLrJWnBJuqL72wGWBsY/Yl2MnBwSAiYSS77fZ4SwxSQu3FvP 1sXIxSEksJRR4sXSF8wQTh+TRP/5BnaQKjYBTYm/m2+ygdgiAroS/0+/YQEpYha4zSgxdcNT IIeDQ1jAUmLCklyQGhYBVYlziw6B1fMKOEu0Pt7MBLFNTuLkscmsExi5FzAyrGIUTS1NLihO Ss810itOzC0uzUvXS87P3cQICZOvOxiXHrM6xCjAwajEw3vzaFuwEGtiWXFl7iFGCQ5mJRFe LuX2YCHelMTKqtSi/Pii0pzU4kOMTBycUg2MNlILFi1vqrsbZeHhfK08eUomT/lU62fpscdM azuXqT1Zes1yfdMR7Ve90+Te8SYYJxT8cTPZ2bxn4lnbk45TxJzS/7A0r/F9KqG9zDKT+fCZ BwKREs881VxaL2c67+y2Xag7e9aBbJ7n8+2mngops01fMO3g5zrvmJslJa0NEm5zjVr3pi5S YinOSDTUYi4qTgQAVCT+APEBAAA= Cc: linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Andrzej Hajda , Marek Szyprowski X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The patch adds backlight support to s6e8aa0 panel. Signed-off-by: Andrzej Hajda --- drivers/gpu/drm/panel/Kconfig | 2 ++ drivers/gpu/drm/panel/panel-s6e8aa0.c | 50 +++++++++++++++++++++++++++++++++++ 2 files changed, 52 insertions(+) diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 4ec874d..a54d89b 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -29,5 +29,7 @@ config DRM_PANEL_S6E8AA0 depends on OF select DRM_MIPI_DSI select VIDEOMODE_HELPERS + select BACKLIGHT_LCD_SUPPORT + select BACKLIGHT_CLASS_DEVICE endmenu diff --git a/drivers/gpu/drm/panel/panel-s6e8aa0.c b/drivers/gpu/drm/panel/panel-s6e8aa0.c index 35941d2..98a59a7 100644 --- a/drivers/gpu/drm/panel/panel-s6e8aa0.c +++ b/drivers/gpu/drm/panel/panel-s6e8aa0.c @@ -19,6 +19,7 @@ #include #include +#include #include #include @@ -91,6 +92,8 @@ struct s6e8aa0_variant { const s6e8aa0_gamma_table *gamma_tables; }; +#define S6E8AA0_STATE_BIT_ENABLED 0 + struct s6e8aa0 { struct device *dev; struct drm_panel panel; @@ -106,6 +109,7 @@ struct s6e8aa0 { u32 width_mm; u32 height_mm; + unsigned long state; u8 version; u8 id; const struct s6e8aa0_variant *variant; @@ -890,6 +894,7 @@ static int s6e8aa0_disable(struct drm_panel *panel) { struct s6e8aa0 *ctx = panel_to_s6e8aa0(panel); + clear_bit(S6E8AA0_STATE_BIT_ENABLED, &ctx->state); s6e8aa0_dcs_write_seq_static(ctx, MIPI_DCS_ENTER_SLEEP_MODE); s6e8aa0_dcs_write_seq_static(ctx, MIPI_DCS_SET_DISPLAY_OFF); msleep(40); @@ -913,6 +918,8 @@ static int s6e8aa0_enable(struct drm_panel *panel) if (ret < 0) s6e8aa0_disable(panel); + else + set_bit(S6E8AA0_STATE_BIT_ENABLED, &ctx->state); return ret; } @@ -947,6 +954,47 @@ static const struct drm_panel_funcs s6e8aa0_drm_funcs = { .get_modes = s6e8aa0_get_modes, }; +static int s6e8aa0_get_brightness(struct backlight_device *bd) +{ + return bd->props.brightness; +} + +static int s6e8aa0_set_brightness(struct backlight_device *bd) +{ + struct s6e8aa0 *ctx = bl_get_data(bd); + + bd->props.power = FB_BLANK_UNBLANK; + if (ctx->brightness != bd->props.brightness) { + ctx->brightness = bd->props.brightness; + if (test_bit(S6E8AA0_STATE_BIT_ENABLED, &ctx->state)) + s6e8aa0_brightness_set(ctx); + } + + return s6e8aa0_clear_error(ctx); +} + +static const struct backlight_ops s6e8aa0_backlight_ops = { + .get_brightness = s6e8aa0_get_brightness, + .update_status = s6e8aa0_set_brightness, +}; + +static void s6e8aa0_backlight_register(struct s6e8aa0 *ctx) +{ + struct backlight_properties props = { + .type = BACKLIGHT_RAW, + .brightness = ctx->brightness, + .max_brightness = GAMMA_LEVEL_NUM - 1 + }; + struct device *dev = ctx->dev; + struct backlight_device *bd; + + bd = devm_backlight_device_register(dev, "s6e8aa0-bl", dev, ctx, + &s6e8aa0_backlight_ops, &props); + if (IS_ERR(bd)) + dev_err(dev, "error registering backlight device (%ld)\n", + PTR_ERR(bd)); +} + static int s6e8aa0_parse_dt(struct s6e8aa0 *ctx) { struct device *dev = ctx->dev; @@ -1029,6 +1077,8 @@ static int s6e8aa0_probe(struct mipi_dsi_device *dsi) if (ret < 0) drm_panel_remove(&ctx->panel); + s6e8aa0_backlight_register(ctx); + return ret; }