From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0BC604EC658; Mon, 28 Sep 2026 16:22:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790612552; cv=none; b=A9Z9vPoo665M/Ul0D1EqMB6RmgLXDSsnKaVMXNp6twW+/MElPcNHF85QlZki1XwS4SyLezO3jKPvJyHC/YyzvB4H/H3QjGVkkGBzE0WdSchVOxKol+v9JWd78lBtukLyUCqSWrxg4TPQHQgH9dal4/8raUUkv1GxPGyLqx6s2Sg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790612552; c=relaxed/simple; bh=89k9KSU3yiMbMLTJ99z/iNKamETD7Q7S+e0/Ah/AIiY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=LAManyuBcp548el3Rd8XksqumXKZX6l/syJebUrRFCaocGrpXIRdDm4VcWKBT8BVSED7ZmUmKDUHQ9t19u7sykYhl+U/5Kmgc4G73yWfXFi/qnQgbyI0VOstRgwxzGv35d1WEJ/1NTkhDMojKdWCkfZ12DCCCMefw9r6FxACLZU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mxQomtFQ; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="mxQomtFQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E23F01F0089B; Mon, 28 Sep 2026 16:22:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790612550; bh=VP5IhzUlPxzFJwkYVvuQ8CT3t9rGSF8B7tbh7+IcBQo=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=mxQomtFQOwHyp8GaXlX96reKoFni9WOvkNPFVu1OU4B34F+KZhwjdhUJDwe/vaWG/ 8ESemJ0lgI1f3cXufWfW/gxru/OTihIFTeKgzBVneP4LpKFLKHslm6ByQIfoi95mHI fRVPOOWFPxI19ivOMY0oMUU7QBErSgp/7JWGoghYN7WN7g+1S7UtYOsoy+O0iKuNFU sKAtDpwziyWRJvsPci8+q9Wg14ZIkPwWaovbwWcym6kCZ0QWk5HyNHoPLBey+/VQZI OKeQ1hyFHl0d8ZhHn6LmUblOVDzZE1Coijj7E8t0VDpyUnPoWX/AA88TBpyzKnIjVK Pqlvg1OmAjjlQ== From: Maxime Ripard Date: Mon, 28 Sep 2026 18:22:04 +0200 Subject: [PATCH 4/6] drm/panel: dsi-bpf: Add Raspberry Pi 7-inch panel BPF program Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260928-drm-mipi-dsi-panel-ebpf-v1-4-5244926aace4@kernel.org> References: <20260928-drm-mipi-dsi-panel-ebpf-v1-0-5244926aace4@kernel.org> In-Reply-To: <20260928-drm-mipi-dsi-panel-ebpf-v1-0-5244926aace4@kernel.org> To: Neil Armstrong , Jessica Zhang , David Airlie , Simona Vetter , Maarten Lankhorst , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Florian Fainelli , Broadcom internal kernel review list Cc: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Albert Esteve , Dave Stevenson , Javier Martinez Canillas , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, llvm@lists.linux.dev, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Maxime Ripard , Benjamin Tissoires X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=6530; i=mripard@kernel.org; h=from:subject:message-id; bh=89k9KSU3yiMbMLTJ99z/iNKamETD7Q7S+e0/Ah/AIiY=; b=owGbwMvMwCmsHn9OcpHtvjLG02pJDFm7phgt5/v762E8o1DP13PX7de7zHX5nRtx4Mrug4/nd 0o4PDBY3jGVhUGYk0FWTJHliUzY6eXti6sc7Ff+gJnDygQyhIGLUwAmsreZsd7LRi5+s4jPn3TD 9knbrLnmHjuq4nxk4z7tTfEPH+f1/Nt2r/dzvI3Mz+XzrF45e+43Ps3Y8IPxWTunwd3LM/V1Qs9 9Fr2i4B9szmq46fjd+9sn2/78cGBy0J8KI7V9d8oudElJvf0cCQA= X-Developer-Key: i=mripard@kernel.org; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D Translate the raspberrypi,dsi-7inch initialization sequence from drivers/gpu/drm/panel/panel-ilitek-ili9881c.c into a BPF program. Signed-off-by: Maxime Ripard --- .../panel/bpf/progs/Raspberrypi__dsi-5inch.bpf.c | 266 +++++++++++++++++++++ 1 file changed, 266 insertions(+) diff --git a/drivers/gpu/drm/panel/bpf/progs/Raspberrypi__dsi-5inch.bpf.c b/drivers/gpu/drm/panel/bpf/progs/Raspberrypi__dsi-5inch.bpf.c new file mode 100644 index 000000000000..1f9ff7f2fd3c --- /dev/null +++ b/drivers/gpu/drm/panel/bpf/progs/Raspberrypi__dsi-5inch.bpf.c @@ -0,0 +1,266 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * BPF panel program for Raspberry Pi 5-inch MIPI-DSI panel (ILI9881C) + * + * Translated from drivers/gpu/drm/panel/panel-ilitek-ili9881c.c + * (rpi_5inch_init[] / rpi_5inch_desc) + */ + +#include "vmlinux.h" +#include "panel-bpf-mipi-dsi.h" +#include + +#define PAGE(p) do { \ + const __u8 _d[] = { 0x98, 0x81, (p) }; \ + panel_bpf_mipi_dsi_dcs_write(pctx, 0xff, _d, sizeof(_d));\ +} while (0) + +#define CMD(c, d) panel_bpf_mipi_dsi_dcs_write_byte(pctx, (c), (d)) + +SEC(PANEL_BPF_MIPI_DSI_PREPARE) +int BPF_PROG(panel_prepare, struct panel_bpf_mipi_dsi_ctx *pctx) +{ + int ret; + + ret = panel_bpf_mipi_dsi_regulator_enable_and_wait(pctx, PANEL_BPF_MIPI_DSI_SUPPLY_IOVCC, 5); + if (ret) + return ret; + + ret = panel_bpf_mipi_dsi_regulator_enable_and_wait(pctx, PANEL_BPF_MIPI_DSI_SUPPLY_VCC, 5); + if (ret) + return ret; + + panel_bpf_mipi_dsi_gpio_cycle_and_wait(pctx, PANEL_BPF_MIPI_DSI_GPIO_RESET, 20, 20); + + /* Page 3 */ + PAGE(3); + CMD(0x01, 0x00); + CMD(0x02, 0x00); + CMD(0x03, 0x73); + CMD(0x04, 0x73); + CMD(0x05, 0x00); + CMD(0x06, 0x06); + CMD(0x07, 0x02); + CMD(0x08, 0x00); + CMD(0x09, 0x01); + CMD(0x0a, 0x01); + CMD(0x0b, 0x01); + CMD(0x0c, 0x01); + CMD(0x0d, 0x01); + CMD(0x0e, 0x01); + CMD(0x0f, 0x01); + CMD(0x10, 0x01); + CMD(0x11, 0x00); + CMD(0x12, 0x00); + CMD(0x13, 0x01); + CMD(0x14, 0x00); + CMD(0x15, 0x00); + CMD(0x16, 0x00); + CMD(0x17, 0x00); + CMD(0x18, 0x00); + CMD(0x19, 0x00); + CMD(0x1a, 0x00); + CMD(0x1b, 0x00); + CMD(0x1c, 0x00); + CMD(0x1d, 0x00); + CMD(0x1e, 0xc0); + CMD(0x1f, 0x80); + CMD(0x20, 0x04); + CMD(0x21, 0x03); + CMD(0x22, 0x00); + CMD(0x23, 0x00); + CMD(0x24, 0x00); + CMD(0x25, 0x00); + CMD(0x26, 0x00); + CMD(0x27, 0x00); + CMD(0x28, 0x33); + CMD(0x29, 0x03); + CMD(0x2a, 0x00); + CMD(0x2b, 0x00); + CMD(0x2c, 0x00); + CMD(0x2d, 0x00); + CMD(0x2e, 0x00); + CMD(0x2f, 0x00); + CMD(0x30, 0x00); + CMD(0x31, 0x00); + CMD(0x32, 0x00); + CMD(0x33, 0x00); + CMD(0x34, 0x03); + CMD(0x35, 0x00); + CMD(0x36, 0x03); + CMD(0x37, 0x00); + CMD(0x38, 0x00); + CMD(0x39, 0x00); + CMD(0x3a, 0x00); + CMD(0x3b, 0x00); + CMD(0x3c, 0x00); + CMD(0x3d, 0x00); + CMD(0x3e, 0x00); + CMD(0x3f, 0x00); + CMD(0x40, 0x00); + CMD(0x41, 0x00); + CMD(0x42, 0x00); + CMD(0x43, 0x00); + CMD(0x44, 0x00); + CMD(0x50, 0x01); + CMD(0x51, 0x23); + CMD(0x52, 0x45); + CMD(0x53, 0x67); + CMD(0x54, 0x89); + CMD(0x55, 0xab); + CMD(0x56, 0x01); + CMD(0x57, 0x23); + CMD(0x58, 0x45); + CMD(0x59, 0x67); + CMD(0x5a, 0x89); + CMD(0x5b, 0xab); + CMD(0x5c, 0xcd); + CMD(0x5d, 0xef); + CMD(0x5e, 0x10); + CMD(0x5f, 0x09); + CMD(0x60, 0x08); + CMD(0x61, 0x0f); + CMD(0x62, 0x0e); + CMD(0x63, 0x0d); + CMD(0x64, 0x0c); + CMD(0x65, 0x02); + CMD(0x66, 0x02); + CMD(0x67, 0x02); + CMD(0x68, 0x02); + CMD(0x69, 0x02); + CMD(0x6a, 0x02); + CMD(0x6b, 0x02); + CMD(0x6c, 0x02); + CMD(0x6d, 0x02); + CMD(0x6e, 0x02); + CMD(0x6f, 0x02); + CMD(0x70, 0x02); + CMD(0x71, 0x06); + CMD(0x72, 0x07); + CMD(0x73, 0x02); + CMD(0x74, 0x02); + CMD(0x75, 0x06); + CMD(0x76, 0x07); + CMD(0x77, 0x0e); + CMD(0x78, 0x0f); + CMD(0x79, 0x0c); + CMD(0x7a, 0x0d); + CMD(0x7b, 0x02); + CMD(0x7c, 0x02); + CMD(0x7d, 0x02); + CMD(0x7e, 0x02); + CMD(0x7f, 0x02); + CMD(0x80, 0x02); + CMD(0x81, 0x02); + CMD(0x82, 0x02); + CMD(0x83, 0x02); + CMD(0x84, 0x02); + CMD(0x85, 0x02); + CMD(0x86, 0x02); + CMD(0x87, 0x09); + CMD(0x88, 0x08); + CMD(0x89, 0x02); + CMD(0x8a, 0x02); + + /* Page 4 */ + PAGE(4); + CMD(0x6c, 0x15); + CMD(0x6e, 0x2a); + CMD(0x6f, 0x57); + CMD(0x3a, 0xa4); + CMD(0x8d, 0x1a); + CMD(0x87, 0xba); + CMD(0x26, 0x76); + CMD(0xb2, 0xd1); + + /* Page 1 */ + PAGE(1); + CMD(0x22, 0x0a); + CMD(0x31, 0x00); + CMD(0x53, 0x35); + CMD(0x55, 0x50); + CMD(0x50, 0xaf); + CMD(0x51, 0xaf); + CMD(0x60, 0x14); + CMD(0xa0, 0x08); + CMD(0xa1, 0x1d); + CMD(0xa2, 0x2c); + CMD(0xa3, 0x14); + CMD(0xa4, 0x19); + CMD(0xa5, 0x2e); + CMD(0xa6, 0x22); + CMD(0xa7, 0x23); + CMD(0xa8, 0x97); + CMD(0xa9, 0x1e); + CMD(0xaa, 0x29); + CMD(0xab, 0x7b); + CMD(0xac, 0x18); + CMD(0xad, 0x17); + CMD(0xae, 0x4b); + CMD(0xaf, 0x1f); + CMD(0xb0, 0x27); + CMD(0xb1, 0x52); + CMD(0xb2, 0x63); + CMD(0xb3, 0x39); + CMD(0xc0, 0x08); + CMD(0xc1, 0x1d); + CMD(0xc2, 0x2c); + CMD(0xc3, 0x14); + CMD(0xc4, 0x19); + CMD(0xc5, 0x2e); + CMD(0xc6, 0x22); + CMD(0xc7, 0x23); + CMD(0xc8, 0x97); + CMD(0xc9, 0x1e); + CMD(0xca, 0x29); + CMD(0xcb, 0x7b); + CMD(0xcc, 0x18); + CMD(0xcd, 0x17); + CMD(0xce, 0x4b); + CMD(0xcf, 0x1f); + CMD(0xd0, 0x27); + CMD(0xd1, 0x52); + CMD(0xd2, 0x63); + CMD(0xd3, 0x39); + + /* Switch to page 0 and finalize */ + PAGE(0); + + /* set_tear_on with VBLANK mode (0x00) */ + CMD(0x35, 0x00); + + ret = panel_bpf_mipi_dsi_exit_sleep_mode(pctx); + if (ret) + return ret; + + ret = panel_bpf_mipi_dsi_set_display_on(pctx); + if (ret) + return ret; + + return 0; +} + +SEC(PANEL_BPF_MIPI_DSI_UNPREPARE) +int BPF_PROG(panel_unprepare, struct panel_bpf_mipi_dsi_ctx *pctx) +{ + panel_bpf_mipi_dsi_set_display_off(pctx); + panel_bpf_mipi_dsi_enter_sleep_mode(pctx); + + panel_bpf_mipi_dsi_regulator_disable(pctx, PANEL_BPF_MIPI_DSI_SUPPLY_VCC); + panel_bpf_mipi_dsi_regulator_disable(pctx, PANEL_BPF_MIPI_DSI_SUPPLY_IOVCC); + panel_bpf_mipi_dsi_gpio_enable(pctx, PANEL_BPF_MIPI_DSI_GPIO_RESET); + + return 0; +} + +PANEL_BPF_MIPI_DSI_OPS(raspberrypi_dsi_5inch) = { + .panel_id = "/soc/dsi@7e700000/panel@0", + .compatible = "raspberrypi,dsi-5inch", + .format = MIPI_DSI_FMT_RGB888, + .lanes = 2, + .mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM, + .panel_prepare = (void *)panel_prepare, + .panel_unprepare = (void *)panel_unprepare, +}; + +char _license[] SEC("license") = "GPL"; -- 2.55.0