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[125.227.154.99]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2dd89eb896bsm19014945ad.43.2026.09.16.19.56.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Sep 2026 19:56:51 -0700 (PDT) From: LiangCheng Wang To: Thomas Zimmermann , Javier Martinez Canillas , Devarsh Thakkar , Maarten Lankhorst , Maxime Ripard , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Wig Cheng , Neil Armstrong , Sam Ravnborg Cc: LiangCheng Wang , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Tomi Valkeinen Subject: Re: [PATCH v3 2/2] drm/tiny: add support for PIXPAPER 4.26 monochrome e-ink panel Date: Thu, 17 Sep 2026 10:56:44 +0800 Message-Id: <20260917025644.1262504-1-zaq14760@gmail.com> In-Reply-To: References: <20260529-bar-v3-0-5c2ac1c751ee@gmail.com> <20260529-bar-v3-2-5c2ac1c751ee@gmail.com> <2bfb73e6-dca3-4d93-af04-3c644929dd19@ti.com> <20260616083921.4066690-1-zaq14760@gmail.com> <423c3dca-9589-488d-8462-c3d51f05ee4a@ti.com> <20260617020926.114947-1-zaq14760@gmail.com> <8fcfab0f-6b98-478b-be4a-c5b810fb3524@ti.com> <20260731035705.3198816-1-zaq14760@gmail.com> <20260916082924.956116-1-zaq14760@gmail.com> <0a13ccb8-8817-4223-a4a2-0de594ac8c71@suse.de> <20260916094453.1062125-1-zaq14760@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi Thomas, > There's also the ssd130x driver under solomon/ how does it related to > the ssd16xx? Is that similar as well? They share the vendor, but not much else as far as I can tell - Javier will know ssd130x far better than I do. It is an OLED driver over regmap, while ssd16xx is e-paper over raw SPI with a BUSY handshake, RAM address windows and waveform LUTs. The register maps do not overlap, so I doubt there is much the two could share. Its shape does look like a good model though - one driver covering three sub-families through a variant table. And if you would prefer ssd16xx to sit in drivers/gpu/drm/solomon/ next to it, that is fine by me. > If the ssd16xx does not make progress, we could also try to merge your > code as ssd16xx and Devarsh would then add support for additional ICs on > top. Thank you - I would be glad to help that way if it comes to it. Devarsh, it is your series though, so please say if you would rather carry it yourself; I would only pick it up with your agreement. I should also be honest about what I could offer: only what the SSD1677 and the PIXPAPER 4.26m need, arranged so that further controllers can be added on top. This panel is the only SSD16xx hardware I have, so I could not implement or test the others. If that is too small a starting point, I quite understand. Regards, LiangCheng