From patchwork Wed Oct 23 12:43:48 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Denis Carikli X-Patchwork-Id: 3088231 Return-Path: X-Original-To: patchwork-linux-arm@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 39D869F2B7 for ; Wed, 23 Oct 2013 12:46:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E7DE620439 for ; Wed, 23 Oct 2013 12:46:16 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 512A620353 for ; Wed, 23 Oct 2013 12:46:15 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VYxoP-0005Rl-Ss; Wed, 23 Oct 2013 12:45:22 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VYxo9-0005KH-Kp; Wed, 23 Oct 2013 12:45:05 +0000 Received: from smtp5-g21.free.fr ([2a01:e0c:1:1599::14]) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VYxno-0005Ga-E9 for linux-arm-kernel@lists.infradead.org; Wed, 23 Oct 2013 12:44:47 +0000 Received: from denis-N73SV.local.eukrea.com (unknown [88.170.243.169]) by smtp5-g21.free.fr (Postfix) with ESMTP id 400C0D4817F; Wed, 23 Oct 2013 14:44:19 +0200 (CEST) From: Denis Carikli To: Sascha Hauer Subject: [PATCHv3][ 4/5] video: mx3fb: Introduce regulator support. Date: Wed, 23 Oct 2013 14:43:48 +0200 Message-Id: <1382532229-32755-4-git-send-email-denis@eukrea.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1382532229-32755-1-git-send-email-denis@eukrea.com> References: <1382532229-32755-1-git-send-email-denis@eukrea.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131023_084445_311191_B1DF0358 X-CRM114-Status: GOOD ( 16.85 ) X-Spam-Score: -1.2 (-) Cc: linux-fbdev@vger.kernel.org, Denis Carikli , Tomi Valkeinen , =?UTF-8?q?Eric=20B=C3=A9nard?= , Shawn Guo , Jean-Christophe Plagniol-Villard , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.6 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 This commit is based on the following commit by Fabio Estevam: 4344429 video: mxsfb: Introduce regulator support Cc: Jean-Christophe Plagniol-Villard Cc: Tomi Valkeinen Cc: linux-fbdev@vger.kernel.org Cc: Sascha Hauer Cc: linux-arm-kernel@lists.infradead.org Cc: Eric Bénard Signed-off-by: Denis Carikli --- ChangeLog v2->v3: - The prints are now replaced with non line wrapped prints. - The regulator retrival has been adapted to the new DT bindings which looks more like the IPUv3 ones. - The regulator_is_enabled checks were kept, because regulator_disable do not do such check. --- drivers/video/mx3fb.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 66 insertions(+), 1 deletion(-) diff --git a/drivers/video/mx3fb.c b/drivers/video/mx3fb.c index de5a6c8..1f2ce6d 100644 --- a/drivers/video/mx3fb.c +++ b/drivers/video/mx3fb.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include @@ -269,6 +270,7 @@ struct mx3fb_info { struct dma_async_tx_descriptor *txd; dma_cookie_t cookie; struct scatterlist sg[2]; + struct regulator *reg_lcd; struct fb_var_screeninfo cur_var; /* current var info */ }; @@ -1005,6 +1007,7 @@ static void __blank(int blank, struct fb_info *fbi) struct mx3fb_info *mx3_fbi = fbi->par; struct mx3fb_data *mx3fb = mx3_fbi->mx3fb; int was_blank = mx3_fbi->blank; + int ret; mx3_fbi->blank = blank; @@ -1023,6 +1026,15 @@ static void __blank(int blank, struct fb_info *fbi) case FB_BLANK_HSYNC_SUSPEND: case FB_BLANK_NORMAL: sdc_set_brightness(mx3fb, 0); + if (mx3_fbi->reg_lcd) { + if (regulator_is_enabled(mx3_fbi->reg_lcd)) { + ret = regulator_disable(mx3_fbi->reg_lcd); + if (ret) + dev_warn(fbi->device, + "lcd regulator disable failed with error: %d\n", + ret); + } + } memset((char *)fbi->screen_base, 0, fbi->fix.smem_len); /* Give LCD time to update - enough for 50 and 60 Hz */ msleep(25); @@ -1030,6 +1042,15 @@ static void __blank(int blank, struct fb_info *fbi) break; case FB_BLANK_UNBLANK: sdc_enable_channel(mx3_fbi); + if (mx3_fbi->reg_lcd) { + if (!regulator_is_enabled(mx3_fbi->reg_lcd)) { + ret = regulator_enable(mx3_fbi->reg_lcd); + if (ret) + dev_warn(fbi->device, + "lcd regulator enable failed with error: %d\n", + ret); + } + } sdc_set_brightness(mx3fb, mx3fb->backlight_level); break; } @@ -1206,6 +1227,7 @@ static int mx3fb_suspend(struct platform_device *pdev, pm_message_t state) { struct mx3fb_data *mx3fb = platform_get_drvdata(pdev); struct mx3fb_info *mx3_fbi = mx3fb->fbi->par; + int ret; console_lock(); fb_set_suspend(mx3fb->fbi, 1); @@ -1214,7 +1236,15 @@ static int mx3fb_suspend(struct platform_device *pdev, pm_message_t state) if (mx3_fbi->blank == FB_BLANK_UNBLANK) { sdc_disable_channel(mx3_fbi); sdc_set_brightness(mx3fb, 0); - + if (mx3_fbi->reg_lcd) { + if (regulator_is_enabled(mx3_fbi->reg_lcd)) { + ret = regulator_disable(mx3_fbi->reg_lcd); + if (ret) + dev_warn(&pdev->dev, + "lcd regulator disable failed with error: %d\n", + ret); + } + } } return 0; } @@ -1226,10 +1256,20 @@ static int mx3fb_resume(struct platform_device *pdev) { struct mx3fb_data *mx3fb = platform_get_drvdata(pdev); struct mx3fb_info *mx3_fbi = mx3fb->fbi->par; + int ret; if (mx3_fbi->blank == FB_BLANK_UNBLANK) { sdc_enable_channel(mx3_fbi); sdc_set_brightness(mx3fb, mx3fb->backlight_level); + if (mx3_fbi->reg_lcd) { + if (!regulator_is_enabled(mx3_fbi->reg_lcd)) { + ret = regulator_enable(mx3_fbi->reg_lcd); + if (ret) + dev_warn(&pdev->dev, + "lcd regulator enable failed with error: %d\n", + ret); + } + } } console_lock(); @@ -1373,6 +1413,7 @@ static int init_fb_chan(struct mx3fb_data *mx3fb, struct idmac_channel *ichan) struct mx3fb_platform_data *mx3fb_pdata = dev_get_platdata(dev); struct device_node *np = dev->of_node; const char *name; + const char *regulator_name; const char *ipu_disp_format; unsigned int irq; struct fb_info *fbi; @@ -1395,6 +1436,9 @@ static int init_fb_chan(struct mx3fb_data *mx3fb, struct idmac_channel *ichan) return -EINVAL; } + of_property_read_string(display_np, "regulator-name", + ®ulator_name); + of_property_read_string(display_np, "interface-pix-fmt", &ipu_disp_format); if (!ipu_disp_format) { @@ -1509,6 +1553,24 @@ static int init_fb_chan(struct mx3fb_data *mx3fb, struct idmac_channel *ichan) if (ret < 0) goto erfb; + /* In dt mode, + * using devm_regulator_get would require that the proprety referencing + * the regulator phandle has to be inside the mx3fb node. + */ + if (np) { + if (regulator_name) + mx3fbi->reg_lcd = regulator_get(NULL, regulator_name); + } else { + mx3fbi->reg_lcd = devm_regulator_get(dev, "lcd"); + } + + if (IS_ERR(mx3fbi->reg_lcd)) { + dev_warn(mx3fb->dev, "Operating without regulator \"lcd\"\n"); + mx3fbi->reg_lcd = NULL; + } else { + dev_info(mx3fb->dev, "Using \"lcd\" Regulator\n"); + } + return 0; erfb: @@ -1575,6 +1637,7 @@ static int mx3fb_probe(struct platform_device *pdev) dma_cap_mask_t mask; struct dma_chan *chan; struct dma_chan_request rq; + struct mx3fb_info *mx3_fbi; /* * Display Interface (DI) and Synchronous Display Controller (SDC) @@ -1630,6 +1693,8 @@ ersdc0: dmaengine_put(); iounmap(mx3fb->reg_base); eremap: + mx3_fbi = mx3fb->fbi->par; + regulator_put(mx3_fbi->reg_lcd); kfree(mx3fb); dev_err(dev, "mx3fb: failed to register fb\n"); return ret;