From patchwork Fri Feb 11 09:19:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javier Martinez Canillas X-Patchwork-Id: 12743054 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6CB0BC433EF for ; Fri, 11 Feb 2022 09:19:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348443AbiBKJTk (ORCPT ); Fri, 11 Feb 2022 04:19:40 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:60260 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237303AbiBKJTj (ORCPT ); Fri, 11 Feb 2022 04:19:39 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id A036C337 for ; Fri, 11 Feb 2022 01:19:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1644571177; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=pbRMjrOYXoV30kR7B4cKGNrPjuiwGwQkUxB9k4BkJUQ=; b=XbC7yxfuX8MRtHWhGSRe6U8E4auSpkwCr2OKzUxUC1TX8IoL1DAhtj/AvS/Qz/04NDbmLs htf/BUTX2VW32xWvpPJ9DgPpFxwCKix8UyMPQCVLpRn25FKe92lweM+SUoFLGvr9NhHqTj IQs3Gn/w6na2+FAKhVF7Oh6JlpFVo6I= Received: from mail-wm1-f70.google.com (mail-wm1-f70.google.com [209.85.128.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-453-ktdZjlg2MJi9IQd62lZjNg-1; Fri, 11 Feb 2022 04:19:36 -0500 X-MC-Unique: ktdZjlg2MJi9IQd62lZjNg-1 Received: by mail-wm1-f70.google.com with SMTP id n3-20020a05600c294300b0037bc685b717so2258419wmd.8 for ; Fri, 11 Feb 2022 01:19:36 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=pbRMjrOYXoV30kR7B4cKGNrPjuiwGwQkUxB9k4BkJUQ=; b=UoOEPHki0k9oFVSPV1mu16xjPKIkRhT/ihR/SDW0EsKxrZfaRSfrweAm7nosZfN4VP kmn7Fd97OLHYPR+9UOWTTzABwTV8ktSzeZl7bFSN2dlrnrZt5jQgmhGIXA+H+4buVQE9 Ft9vbee7DtaknoNQray4FwoeMEC0bCrwGvndtG8ZWAEX2YzVbYUqDr/wL1FXSPrsvCnO 0hxNo1O/Ko1qZuWG+Wfjc2OdrKd1rlj7qUp87scdYCKa3bLAMT/7IgIFGQGWG9IGS3hD fCP81nAMBrRR48QrtSU3sKcgH3WM3zu+j6KsPzq3Zlaetr8ud7Jv7YOmmgovi1wHPVvj Bokw== X-Gm-Message-State: AOAM531Vr7dxBQzvzBsgjbCfyE6vGOIAzzDdAgYYVDEoGQLlzxY5lMnh 9Fy8fbyox5M5CTiH0FR9tOLaXe8e350qheFSG4R7cCRufWpQyLDNDgVUY8GNy8ApupAGELV3CgI KeutXLyLADUNZDaDqqDKrzgM= X-Received: by 2002:a05:600c:4f02:: with SMTP id l2mr648770wmq.115.1644571175386; Fri, 11 Feb 2022 01:19:35 -0800 (PST) X-Google-Smtp-Source: ABdhPJxr0lW6hjWm3pVsSHTDsgb5mYafMoI0gJsI8Msc0Qhi547hDX6MT3H3LfS8grRnbdz9dc86hw== X-Received: by 2002:a05:600c:4f02:: with SMTP id l2mr648757wmq.115.1644571175124; Fri, 11 Feb 2022 01:19:35 -0800 (PST) Received: from minerva.home ([92.176.231.205]) by smtp.gmail.com with ESMTPSA id r17sm3805578wmq.33.2022.02.11.01.19.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Feb 2022 01:19:34 -0800 (PST) From: Javier Martinez Canillas To: linux-kernel@vger.kernel.org Cc: linux-fbdev@vger.kernel.org, Geert Uytterhoeven , Andy Shevchenko , Maxime Ripard , Daniel Vetter , dri-devel@lists.freedesktop.org, Thomas Zimmermann , Sam Ravnborg , =?utf-8?q?Noralf_Tr=C3=B8nnes?= , Javier Martinez Canillas , Daniel Vetter , David Airlie , Lee Jones , Maarten Lankhorst , Maxime Ripard , Rob Herring , Thierry Reding , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , devicetree@vger.kernel.org, linux-pwm@vger.kernel.org Subject: [PATCH v4 0/6] drm: Add driver for Solomon SSD130x OLED displays Date: Fri, 11 Feb 2022 10:19:21 +0100 Message-Id: <20220211091927.2988283-1-javierm@redhat.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org This patch series adds a DRM driver for the Solomon OLED SSD1305, SSD1306, SSD1307 and SSD1309 displays. It is a port of the ssd1307fb fbdev driver. Using the DRM fbdev emulation, all the tests from Geert Uytterhoeven repo (https://git.kernel.org/pub/scm/linux/kernel/git/geert/fbtest.git) passes. I've also tested it using the display as a VT output and even though fbcon seems to work, it is mostly unusable on a 128x64 SSD1306 display. This is a v4 that addresses the issues pointed in v3. Thanks a lot to all reviewers that gave me feedback and comments. I didn't include the patch that adds the SPI support this time, because it will require changes in the existing Device Tree binding. And I wanted to avoid that bikesheeding for now, to focus on the core and I2C parts. Once this series land, I'll post patches for the SPI support. But the WIP patch posted in v3 should still apply cleanly on top of this v4: https://patchwork.kernel.org/project/dri-devel/patch/20220209091204.2513437-1-javierm@redhat.com/ Patch #1 splits per-line conversion logic in drm_fb_xrgb8888_to_gray8() to a separate drm_fb_xrgb8888_to_gray8_line() helper function. Patch #2 adds a new drm_fb_xrgb8888_to_mono_reversed() helper function to convert from XR24 to reversed monochrome. The latter internally converts each line first to 8-bit grayscale and then to 1-bit reversed monochrome. Patch #3 adds the driver. This only has the core support and doesn't have any bus specific code, separate drivers are needed for the transport used. Patch #4 adds a driver to use the I2C bus to communicate with the device. Patch #5 adds a MAINTAINERS entry for the DRM driver and patch #6 adds myself as co-maintainer of the existing DT binding for the ssd1307fb, since the same DT binding is used for both the fbdev and DRM drivers. Best regards, Javier Changes in v4: - Rename end_offset to end_len (Thomas Zimmermann) - Warn once if dst_pitch is not a multiple of 8 (Thomas Zimmermann) - Drop drm_fb_gray8_to_mono_reversed() that's not used (Thomas Zimmermann) - Allocate single buffer for both copy cma memory and gray8 (Thomas Zimmermann) - Add Thomas Zimmermann Reviewed-by tag to patch adding XR24 -> mono helper. - Rename vbat supply to vcc since is how's labeled in the device (Mark Brown) - Don't make the regulator option since is always needed (Mark Brown) - Add solomon Kconfig source and directory inclusion sorted (Andy Shevchenko) - Use SSD130x instead of SSD130X to denote is not a model name (Andy Shevchenko) - Check if there's a reset pin in the callee and not the caller (Andy Shevchenko) - Define missing commands instead of using magic numbers (Andy Shevchenko) - Use GENMASK() and FIELD_PREP() macros when possible (Andy Shevchenko) - Avoid using ternary operators to ease code readablity (Andy Shevchenko) - Use i++ instead of --i on some for loops (Andy Shevchenko) - Remove redundant blank lines (Andy Shevchenko) - Rename power_off label to out_power_off (Andy Shevchenko) - Use dev_err_probe() even if no -EPROBE_DEFER (Andy Shevchenko) - Don't use plural Authors if there's only one (Andy Shevchenko) - Remove unnecessary casting (Geert Uytterhoeven) - Remove redundant blank lines (Andy Shevchenko) - Remove comma after of_device_id table terminator (Andy Shevchenko) - Add Rob Herring Acked-by tag to patch adding as DT binding co-maintainer. Changes in v3: - Add a drm_fb_xrgb8888_to_gray8_line() helper function (Thomas Zimmermann) - Also add a drm_fb_xrgb8888_to_mono_reversed() helper (Thomas Zimmermann) - Split lines copy to drm_fb_gray8_to_mono_reversed_line() (Thomas Zimmermann) - Handle case where the source buffer is not aligned to 8 (Thomas Zimmermann) - Move driver from tiny sub-dir to drivers/gpu/drm/solomon (Sam Ravnborg) - Split driver in a bus agnostic core and bus specific (Andy Shevchenko) - Use regmap to access the chip registers (Andy Shevchenko) - Remove unnecessary blank lines (Andy Shevchenko) - Remove unneeded inline specifier in functions (Andy Shevchenko) - Add a comment about always returning a single mode (Andy Shevchenko) - Change write command logic to use do while loop (Andy Shevchenko) - Use "firmware description" instead of "device tree" (Andy Shevchenko) - Use return foo() instead of returning the return value (Andy Shevchenko) - Don't split lines longer than 80 chars if makes less readable (Andy Shevchenko) - Remove redundant else statements in .mode_valid callback (Andy Shevchenko) - Rename powero{n,ff}() functions to power_o{n,ff)() (Andy Shevchenko) - Use dev_err_probe() to prevent spam logs on probe deferral (Andy Shevchenko) - Remove ',' after sentinel terminator in array (Andy Shevchenko) - Fix a bug when doing partial updates (Geert Uytterhoeven) - Add a separate driver for SSD130X chips I2C support (Andy Shevchenko) - Adapt MAINTAINERS entry to point to the new drivers/gpu/drm/solomon directory. Changes in v2: - Drop patch that was adding a DRM_MODE_CONNECTOR_I2C type. - Invert order of backlight {en,dis}able and display {on,off} (Sam Ravnborg) - Don't clear the screen and turn on display on probe (Sam Ravnborg) - Use backlight_get_brightness() macro to get BL brightness (Sam Ravnborg) - Use dev managed version of devm_backlight_device_register() (Sam Ravnborg) - Use dev_name(dev) for backlight name instead of an array (Sam Ravnborg) - Drop the .get_brightness callback since isn't needed (Sam Ravnborg) - Rename driver to ssd130x since supports a display family (Thomas Zimmermann) - Drop the TINY prefix from the Kconfig symbol (Thomas Zimmermann) - Sort the Kconfig symbol dependencies alphabetically (Thomas Zimmermann) - Rename struct ssd130x_array to struct ssd130x_i2c_msg (Thomas Zimmermann) - Rename struct ssd130x_i2c_msg .type member to .cmd (Thomas Zimmermann) - Use sizeof(*foo) instead of sizeof(struct foo) (Thomas Zimmermann) - Use struct_size() macro to calculate sizeof(*foo) + len (Thomas Zimmermann) - Use kcalloc() instead of kmalloc_array() + memset() (Thomas Zimmermann) - Use shadow plane helpers virtual screen support (Thomas Zimmermann) - Remove unused goto label in ssd1307_fb_blit_rect() (Thomas Zimmermann) - Use drm_set_preferred_mode() inset of manually set (Thomas Zimmermann) - Use shadow plane helpers virtual screen support (Thomas Zimmermann) - Remove unused goto label in ssd1307_fb_blit_rect() (Thomas Zimmermann) - Use drm_set_preferred_mode() inset of manually set (Thomas Zimmermann) - Reorganize code in probe to make it more legible (Thomas Zimmermann) - ssd130x_write_cmd() uses varargs to simplify I2C code (Thomas Zimmermann) - Move regulator/pwm init logic to display pipe enable callback. - Add Sam Ravnborg's acked-by to patch adding a MAINTAINERS entry (Sam Ravnborg) - Add myself as co-maintainer of the ssd1370fb DT binding (Sam Ravnborg). Javier Martinez Canillas (6): drm/format-helper: Add drm_fb_xrgb8888_to_gray8_line() drm/format-helper: Add drm_fb_xrgb8888_to_mono_reversed() drm: Add driver for Solomon SSD130x OLED displays drm/solomon: Add SSD130x OLED displays I2C support MAINTAINERS: Add entry for Solomon SSD130x OLED displays DRM driver dt-bindings: display: ssd1307fb: Add myself as binding co-maintainer .../bindings/display/solomon,ssd1307fb.yaml | 1 + MAINTAINERS | 7 + drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/drm_format_helper.c | 138 ++- drivers/gpu/drm/solomon/Kconfig | 21 + drivers/gpu/drm/solomon/Makefile | 2 + drivers/gpu/drm/solomon/ssd130x-i2c.c | 116 +++ drivers/gpu/drm/solomon/ssd130x.c | 852 ++++++++++++++++++ drivers/gpu/drm/solomon/ssd130x.h | 76 ++ include/drm/drm_format_helper.h | 4 + 11 files changed, 1208 insertions(+), 12 deletions(-) create mode 100644 drivers/gpu/drm/solomon/Kconfig create mode 100644 drivers/gpu/drm/solomon/Makefile create mode 100644 drivers/gpu/drm/solomon/ssd130x-i2c.c create mode 100644 drivers/gpu/drm/solomon/ssd130x.c create mode 100644 drivers/gpu/drm/solomon/ssd130x.h