From: Maxime Ripard <mripard@kernel.org>
To: Neil Armstrong <neil.armstrong@linaro.org>,
Jessica Zhang <jesszhan0024@gmail.com>,
David Airlie <airlied@gmail.com>,
Simona Vetter <simona@ffwll.ch>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Thomas Zimmermann <tzimmermann@suse.de>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Bill Wendling <morbo@google.com>,
Justin Stitt <justinstitt@google.com>,
Florian Fainelli <florian.fainelli@broadcom.com>,
Broadcom internal kernel review list
<bcm-kernel-feedback-list@broadcom.com>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>,
Neil Armstrong <neil.armstrong@linaro.org>,
Robert Foss <rfoss@kernel.org>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Jonas Karlman <jonas@kwiboo.se>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Luca Ceresoli <luca.ceresoli@bootlin.com>,
Albert Esteve <aesteve@redhat.com>,
Dave Stevenson <dave.stevenson@raspberrypi.com>,
Javier Martinez Canillas <javierm@redhat.com>,
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 <mripard@kernel.org>,
Benjamin Tissoires <bentiss@kernel.org>
Subject: [PATCH 4/6] drm/panel: dsi-bpf: Add Raspberry Pi 7-inch panel BPF program
Date: Mon, 28 Sep 2026 18:22:04 +0200 [thread overview]
Message-ID: <20260928-drm-mipi-dsi-panel-ebpf-v1-4-5244926aace4@kernel.org> (raw)
In-Reply-To: <20260928-drm-mipi-dsi-panel-ebpf-v1-0-5244926aace4@kernel.org>
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 <mripard@kernel.org>
---
.../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 <bpf/bpf_tracing.h>
+
+#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
next prev parent reply other threads:[~2026-09-28 16:22 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-28 16:22 [PATCH 0/6] drm/bridge: Add a BPF-based MIPI-DSI panel driver Maxime Ripard
2026-09-28 16:22 ` [PATCH 1/6] dt-bindings: display: Add panel-mipi-dsi-bpf generic panel binding Maxime Ripard
2026-09-28 19:16 ` Neil Armstrong
2026-09-28 20:40 ` Rob Herring
2026-09-29 8:39 ` Maxime Ripard
2026-09-29 22:28 ` Rob Herring
2026-09-30 8:04 ` Maxime Ripard
2026-09-30 19:07 ` Rob Herring
2026-10-01 7:22 ` Maxime Ripard
2026-10-01 16:03 ` Rob Herring
2026-09-30 13:32 ` Neil Armstrong
2026-10-01 7:09 ` Maxime Ripard
2026-10-02 7:28 ` Neil Armstrong
2026-09-28 20:43 ` Rob Herring (Arm)
2026-09-29 23:44 ` bot+bpf-ci
2026-09-28 16:22 ` [PATCH 2/6] drm/panel: Add generic MIPI-DSI panel driver with BPF init sequences Maxime Ripard
2026-09-28 16:22 ` [PATCH 3/6] drm/panel: dsi-bpf: Add BPF program build infrastructure and helper header Maxime Ripard
2026-09-29 23:44 ` bot+bpf-ci
2026-09-28 16:22 ` Maxime Ripard [this message]
2026-09-28 16:22 ` [PATCH 5/6] drm/panel: dsi-bpf: Add Raspberry Pi 5-inch panel BPF program Maxime Ripard
2026-09-28 16:22 ` [PATCH DO NOT MERGE 6/6] arm64: dts: broadcom: Add Raspberry Pi ILI9881C DSI panel overlays Maxime Ripard
2026-09-28 16:37 ` [PATCH 0/6] drm/bridge: Add a BPF-based MIPI-DSI panel driver Laurent Pinchart
2026-09-28 17:31 ` Benjamin Tissoires
2026-09-28 18:12 ` Laurent Pinchart
2026-09-29 6:54 ` Maxime Ripard
2026-09-28 16:39 ` Neil Armstrong
2026-09-28 17:24 ` Benjamin Tissoires
2026-09-28 19:20 ` Neil Armstrong
2026-09-28 19:48 ` Benjamin Tissoires
2026-09-28 20:36 ` Neil Armstrong
2026-09-29 7:41 ` Maxime Ripard
2026-09-29 7:55 ` Javier Martinez Canillas
2026-09-30 13:37 ` Neil Armstrong
2026-10-01 6:50 ` Maxime Ripard
2026-10-02 7:30 ` Neil Armstrong
2026-10-02 7:37 ` Javier Martinez Canillas
2026-10-02 7:53 ` Neil Armstrong
2026-10-02 9:04 ` Javier Martinez Canillas
2026-09-30 13:36 ` Neil Armstrong
2026-09-30 20:59 ` Kumar Kartikeya Dwivedi
2026-10-01 6:38 ` Maxime Ripard
2026-10-01 17:03 ` Maxime Ripard
2026-09-29 7:27 ` Maxime Ripard
2026-09-30 13:49 ` Neil Armstrong
2026-10-01 7:01 ` Maxime Ripard
2026-10-02 7:39 ` Neil Armstrong
2026-09-29 7:13 ` Maxime Ripard
2026-09-29 7:46 ` Benjamin Tissoires
2026-09-30 13:46 ` Neil Armstrong
2026-10-01 6:48 ` Maxime Ripard
2026-10-02 8:11 ` Neil Armstrong
2026-09-29 9:03 ` Jani Nikula
2026-09-29 9:32 ` Benjamin Tissoires
2026-09-29 10:16 ` Jani Nikula
2026-09-29 12:28 ` Maxime Ripard
2026-09-30 14:01 ` Neil Armstrong
2026-09-30 19:18 ` Jani Nikula
2026-10-01 7:05 ` Maxime Ripard
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