From patchwork Mon Nov 4 16:15:22 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Denis Carikli X-Patchwork-Id: 3136461 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 9C3679F407 for ; Mon, 4 Nov 2013 16:18:17 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D0FCF2054C for ; Mon, 4 Nov 2013 16:18:12 +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 DD17320115 for ; Mon, 4 Nov 2013 16:18:07 +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 1VdMpT-0004B2-2Q; Mon, 04 Nov 2013 16:16:39 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VdMpC-0007bW-EC; Mon, 04 Nov 2013 16:16:22 +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 1VdMp7-0007Yk-3J for linux-arm-kernel@lists.infradead.org; Mon, 04 Nov 2013 16:16:19 +0000 Received: from denis-N73SV.local.eukrea.com (unknown [88.170.243.169]) by smtp5-g21.free.fr (Postfix) with ESMTP id 81839D48270; Mon, 4 Nov 2013 17:15:49 +0100 (CET) From: Denis Carikli To: Shawn Guo Subject: [PATCHv4][ 4/6] video: mx3fb: Introduce regulator support. Date: Mon, 4 Nov 2013 17:15:22 +0100 Message-Id: <1383581724-14817-4-git-send-email-denis@eukrea.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1383581724-14817-1-git-send-email-denis@eukrea.com> References: <1383581724-14817-1-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-20131104_111617_871554_54BD8905 X-CRM114-Status: GOOD ( 17.55 ) X-Spam-Score: -1.2 (-) Cc: devicetree@vger.kernel.org, linux-fbdev@vger.kernel.org, =?UTF-8?q?Eric=20B=C3=A9nard?= , Rob Herring , Denis Carikli , Tomi Valkeinen , Sascha Hauer , Grant Likely , 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=-4.2 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 v3->v4: - Some code style fixes. - Improved error handling in eremap. 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 | 71 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 70 insertions(+), 1 deletion(-) diff --git a/drivers/video/mx3fb.c b/drivers/video/mx3fb.c index 75087c8..fd8df64 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->platform_data; 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; @@ -1389,6 +1430,9 @@ 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) { @@ -1503,6 +1547,25 @@ 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 \"%s\" Regulator\n", + regulator_name); + } + return 0; erfb: @@ -1569,6 +1632,7 @@ 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) @@ -1624,6 +1688,11 @@ ersdc0: dmaengine_put(); iounmap(mx3fb->reg_base); eremap: + if (mx3fb->fbi) { + mx3_fbi = mx3fb->fbi->par; + if (mx3_fbi->reg_lcd) + regulator_put(mx3_fbi->reg_lcd); + } kfree(mx3fb); dev_err(dev, "mx3fb: failed to register fb\n"); return ret;