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[211.23.39.77]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2beb58b2d47sm147055165ad.45.2026.05.26.02.57.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 May 2026 02:57:43 -0700 (PDT) From: LiangCheng Wang Subject: [PATCH v2 0/2] drm/tiny: add support for PIXPAPER 4.26 monochrome e-ink panel Date: Tue, 26 May 2026 17:57:15 +0800 Message-Id: <20260526-bar-v2-0-c66df9a840c4@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAHtuFWoC/zWMywrDIBBFfyXMuhYfUbCr/kfIwtoxGWhi0SItw X+vFbo8l3vOARkTYYbLcEDCQpni3kCeBvCr2xdkdG8MkkvDNdfs5hLTUgXpVTBWWWjPZ8JA716 Z5sYr5VdMnx4t4rf+fdP9IhhnQgqrR27CiOG6bI4eZx83mGutX0IBFuqWAAAA X-Change-ID: 20260505-bar-523f2c3f6939 To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Wig Cheng Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, LiangCheng Wang X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1779789463; l=1797; i=zaq14760@gmail.com; h=from:subject:message-id; bh=Kmq+0JLaZnUA+G7wcCq8VCK1JhVzlHRY2UTpbNvp+v0=; b=H20lFZ57zk7aLVD9tzw2j8UNuMfNWBa3MKA5sXBHiXJmdmFROxPxHaCPGx/w/yU34eWDDAUXZ pgYnO/HpbeIB5T8zuWr/aDgC+EEg/JnKGg4LLGiEJGXw+g1avjDnKhI X-Developer-Key: i=zaq14760@gmail.com; a=ed25519; pk=5IaLhzvMqasgGPT47dsa8HEpfb0/Dv2BZC0TzSLj6E0= This patch series adds support for the Mayqueen Pixpaper 4.26 monochrome e-ink display panel, controlled via SPI. The series includes: - Device tree binding updates for the Pixpaper 4.26 panel - A DRM tiny driver implementation for the Pixpaper 4.26 panel - A MAINTAINERS update for the Pixpaper DRM drivers and binding The panel supports 800x480 resolution with XRGB8888 framebuffer input and uses SPI, along with GPIO lines for reset, busy, and data/command control. Tested on: - Raspberry Pi 5 with Linux kernel 7.1.0-rc1 Feedback is welcome. Signed-off-by: LiangCheng Wang --- Changes in v2: - Explain why pixpaper-426m requires a distinct compatible string despite sharing the same SPI and GPIO properties with the existing Pixpaper panel. - Drop the duplicated pixpaper-426m DT binding example. - Update the binding description for multiple Pixpaper panels. - Select DRM_GEM_SHMEM_HELPER instead of DRM_GEM_DMA_HELPER for the pixpaper-426m driver. - Link to v1: https://lore.kernel.org/r/20260506-bar-v1-0-12195406f4ef@gmail.com --- LiangCheng Wang (2): dt-bindings: display: mayqueen,pixpaper: add pixpaper-426m drm/tiny: add support for PIXPAPER 4.26 monochrome e-ink panel .../bindings/display/mayqueen,pixpaper.yaml | 13 +- MAINTAINERS | 3 +- drivers/gpu/drm/tiny/Kconfig | 16 + drivers/gpu/drm/tiny/Makefile | 1 + drivers/gpu/drm/tiny/pixpaper-426m.c | 828 +++++++++++++++++++++ 5 files changed, 855 insertions(+), 6 deletions(-) --- base-commit: a293ec25d59dd96309058c70df5a4dd0f889a1e4 change-id: 20260505-bar-523f2c3f6939 Best regards, -- LiangCheng Wang