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(unknown [IPv6:2a02:1808:204:e56c:df60:5720:79e:c1dd]) by zproxy3.enst.fr (Postfix) with ESMTPSA id E52A2A077F; Wed, 24 Apr 2024 22:09:36 +0200 (CEST) From: =?utf-8?q?In=C3=A8s_Varhol?= To: qemu-devel@nongnu.org Cc: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Samuel Tardieu , qemu-arm@nongnu.org, Thomas Huth , Arnaud Minier , Peter Maydell , =?utf-8?q?In=C3=A8s_Varhol?= , Laurent Vivier , Paolo Bonzini , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Alistair Francis Subject: [PATCH v6 1/5] hw/display : Add device DM163 Date: Wed, 24 Apr 2024 22:06:51 +0200 Message-ID: <20240424200929.240921-2-ines.varhol@telecom-paris.fr> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240424200929.240921-1-ines.varhol@telecom-paris.fr> References: <20240424200929.240921-1-ines.varhol@telecom-paris.fr> MIME-Version: 1.0 Received-SPF: pass client-ip=137.194.2.222; envelope-from=ines.varhol@telecom-paris.fr; helo=zproxy3.enst.fr X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, WEIRD_QUOTING=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org This device implements the IM120417002 colors shield v1.1 for Arduino (which relies on the DM163 8x3-channel led driving logic) and features a simple display of an 8x8 RGB matrix. The columns of the matrix are driven by the DM163 and the rows are driven externally. Acked-by: Alistair Francis Signed-off-by: Arnaud Minier Signed-off-by: Inès Varhol Reviewed-by: Philippe Mathieu-Daudé --- docs/system/arm/b-l475e-iot01a.rst | 3 +- include/hw/display/dm163.h | 59 +++++ hw/display/dm163.c | 349 +++++++++++++++++++++++++++++ hw/display/Kconfig | 3 + hw/display/meson.build | 1 + hw/display/trace-events | 14 ++ 6 files changed, 428 insertions(+), 1 deletion(-) create mode 100644 include/hw/display/dm163.h create mode 100644 hw/display/dm163.c diff --git a/docs/system/arm/b-l475e-iot01a.rst b/docs/system/arm/b-l475e-iot01a.rst index 0afef8e4f4..91de5e82fc 100644 --- a/docs/system/arm/b-l475e-iot01a.rst +++ b/docs/system/arm/b-l475e-iot01a.rst @@ -12,13 +12,14 @@ USART, I2C, SPI, CAN and USB OTG, as well as a variety of sensors. Supported devices """"""""""""""""" -Currently B-L475E-IOT01A machine's only supports the following devices: +Currently B-L475E-IOT01A machines support the following devices: - Cortex-M4F based STM32L4x5 SoC - STM32L4x5 EXTI (Extended interrupts and events controller) - STM32L4x5 SYSCFG (System configuration controller) - STM32L4x5 RCC (Reset and clock control) - STM32L4x5 GPIOs (General-purpose I/Os) +- optional 8x8 led display (based on DM163 driver) Missing devices """"""""""""""" diff --git a/include/hw/display/dm163.h b/include/hw/display/dm163.h new file mode 100644 index 0000000000..4377f77bb7 --- /dev/null +++ b/include/hw/display/dm163.h @@ -0,0 +1,59 @@ +/* + * QEMU DM163 8x3-channel constant current led driver + * driving columns of associated 8x8 RGB matrix. + * + * Copyright (C) 2024 Samuel Tardieu + * Copyright (C) 2024 Arnaud Minier + * Copyright (C) 2024 Inès Varhol + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef HW_DISPLAY_DM163_H +#define HW_DISPLAY_DM163_H + +#include "qom/object.h" +#include "hw/qdev-core.h" + +#define TYPE_DM163 "dm163" +OBJECT_DECLARE_SIMPLE_TYPE(DM163State, DM163); + +#define RGB_MATRIX_NUM_ROWS 8 +#define RGB_MATRIX_NUM_COLS 8 +#define DM163_NUM_LEDS (RGB_MATRIX_NUM_COLS * 3) +/* The last row is filled with 0 (turned off row) */ +#define COLOR_BUFFER_SIZE (RGB_MATRIX_NUM_ROWS + 1) + +typedef struct DM163State { + DeviceState parent_obj; + + /* DM163 driver */ + uint64_t bank0_shift_register[3]; + uint64_t bank1_shift_register[3]; + uint16_t latched_outputs[DM163_NUM_LEDS]; + uint16_t outputs[DM163_NUM_LEDS]; + qemu_irq sout; + + uint8_t sin; + uint8_t dck; + uint8_t rst_b; + uint8_t lat_b; + uint8_t selbk; + uint8_t en_b; + + /* IM120417002 colors shield */ + uint8_t activated_rows; + + /* 8x8 RGB matrix */ + QemuConsole *console; + uint8_t redraw; + /* Rows currently being displayed on the matrix. */ + /* The last row is filled with 0 (turned off row) */ + uint32_t buffer[COLOR_BUFFER_SIZE][RGB_MATRIX_NUM_COLS]; + uint8_t last_buffer_idx; + uint8_t buffer_idx_of_row[RGB_MATRIX_NUM_ROWS]; + /* Used to simulate retinal persistence of rows */ + uint8_t row_persistence_delay[RGB_MATRIX_NUM_ROWS]; +} DM163State; + +#endif /* HW_DISPLAY_DM163_H */ diff --git a/hw/display/dm163.c b/hw/display/dm163.c new file mode 100644 index 0000000000..a5fbca1a0f --- /dev/null +++ b/hw/display/dm163.c @@ -0,0 +1,349 @@ +/* + * QEMU DM163 8x3-channel constant current led driver + * driving columns of associated 8x8 RGB matrix. + * + * Copyright (C) 2024 Samuel Tardieu + * Copyright (C) 2024 Arnaud Minier + * Copyright (C) 2024 Inès Varhol + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +/* + * The reference used for the DM163 is the following : + * http://www.siti.com.tw/product/spec/LED/DM163.pdf + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "migration/vmstate.h" +#include "hw/irq.h" +#include "hw/qdev-properties.h" +#include "hw/display/dm163.h" +#include "ui/console.h" +#include "trace.h" + +#define LED_SQUARE_SIZE 100 +/* Number of frames a row stays visible after being turned off. */ +#define ROW_PERSISTENCE 3 +#define TURNED_OFF_ROW (COLOR_BUFFER_SIZE - 1) + +static const VMStateDescription vmstate_dm163 = { + .name = TYPE_DM163, + .version_id = 1, + .minimum_version_id = 1, + .fields = (const VMStateField[]) { + VMSTATE_UINT64_ARRAY(bank0_shift_register, DM163State, 3), + VMSTATE_UINT64_ARRAY(bank1_shift_register, DM163State, 3), + VMSTATE_UINT16_ARRAY(latched_outputs, DM163State, DM163_NUM_LEDS), + VMSTATE_UINT16_ARRAY(outputs, DM163State, DM163_NUM_LEDS), + VMSTATE_UINT8(dck, DM163State), + VMSTATE_UINT8(en_b, DM163State), + VMSTATE_UINT8(lat_b, DM163State), + VMSTATE_UINT8(rst_b, DM163State), + VMSTATE_UINT8(selbk, DM163State), + VMSTATE_UINT8(sin, DM163State), + VMSTATE_UINT8(activated_rows, DM163State), + VMSTATE_UINT32_2DARRAY(buffer, DM163State, COLOR_BUFFER_SIZE, + RGB_MATRIX_NUM_COLS), + VMSTATE_UINT8(last_buffer_idx, DM163State), + VMSTATE_UINT8_ARRAY(buffer_idx_of_row, DM163State, RGB_MATRIX_NUM_ROWS), + VMSTATE_UINT8_ARRAY(row_persistence_delay, DM163State, + RGB_MATRIX_NUM_ROWS), + VMSTATE_END_OF_LIST() + } +}; + +static void dm163_reset_hold(Object *obj) +{ + DM163State *s = DM163(obj); + + s->sin = 0; + s->dck = 0; + s->rst_b = 0; + /* Ensuring the first falling edge of lat_b isn't missed */ + s->lat_b = 1; + s->selbk = 0; + s->en_b = 0; + /* Reset stops the PWM, not the shift and latched registers. */ + memset(s->outputs, 0, sizeof(s->outputs)); + + s->activated_rows = 0; + s->redraw = 0; + trace_dm163_redraw(s->redraw); + for (unsigned i = 0; i < COLOR_BUFFER_SIZE; i++) { + memset(s->buffer[i], 0, sizeof(s->buffer[0])); + } + s->last_buffer_idx = 0; + memset(s->buffer_idx_of_row, TURNED_OFF_ROW, sizeof(s->buffer_idx_of_row)); + memset(s->row_persistence_delay, 0, sizeof(s->row_persistence_delay)); +} + +static void dm163_dck_gpio_handler(void *opaque, int line, int new_state) +{ + DM163State *s = opaque; + + if (new_state && !s->dck) { + /* + * On raising dck, sample selbk to get the bank to use, and + * sample sin for the bit to enter into the bank shift buffer. + */ + uint64_t *sb = + s->selbk ? s->bank1_shift_register : s->bank0_shift_register; + /* Output the outgoing bit on sout */ + const bool sout = (s->selbk ? sb[2] & MAKE_64BIT_MASK(63, 1) : + sb[2] & MAKE_64BIT_MASK(15, 1)) != 0; + qemu_set_irq(s->sout, sout); + /* Enter sin into the shift buffer */ + sb[2] = (sb[2] << 1) | ((sb[1] >> 63) & 1); + sb[1] = (sb[1] << 1) | ((sb[0] >> 63) & 1); + sb[0] = (sb[0] << 1) | s->sin; + } + + s->dck = new_state; + trace_dm163_dck(new_state); +} + +static void dm163_propagate_outputs(DM163State *s) +{ + s->last_buffer_idx = (s->last_buffer_idx + 1) % RGB_MATRIX_NUM_ROWS; + /* Values are output when reset is high and enable is low. */ + if (s->rst_b && !s->en_b) { + memcpy(s->outputs, s->latched_outputs, sizeof(s->outputs)); + } else { + memset(s->outputs, 0, sizeof(s->outputs)); + } + for (unsigned x = 0; x < RGB_MATRIX_NUM_COLS; x++) { + /* Grouping the 3 RGB channels in a pixel value */ + const uint16_t b = extract16(s->outputs[3 * x + 0], 6, 8); + const uint16_t g = extract16(s->outputs[3 * x + 1], 6, 8); + const uint16_t r = extract16(s->outputs[3 * x + 2], 6, 8); + uint32_t rgba = 0; + + trace_dm163_channels(3 * x + 2, r); + trace_dm163_channels(3 * x + 1, g); + trace_dm163_channels(3 * x + 0, b); + + rgba = deposit32(rgba, 0, 8, r); + rgba = deposit32(rgba, 8, 8, g); + rgba = deposit32(rgba, 16, 8, b); + + /* Led values are sent from the last one to the first one */ + s->buffer[s->last_buffer_idx][RGB_MATRIX_NUM_COLS - x - 1] = rgba; + } + for (unsigned row = 0; row < RGB_MATRIX_NUM_ROWS; row++) { + if (s->activated_rows & (1 << row)) { + s->buffer_idx_of_row[row] = s->last_buffer_idx; + s->redraw |= (1 << row); + trace_dm163_redraw(s->redraw); + } + } +} + +static void dm163_en_b_gpio_handler(void *opaque, int line, int new_state) +{ + DM163State *s = opaque; + + s->en_b = new_state; + dm163_propagate_outputs(s); + trace_dm163_en_b(new_state); +} + +static uint8_t dm163_bank0(const DM163State *s, uint8_t led) +{ + /* + * Bank 0 uses 6 bits per led, so a value may be stored accross + * two uint64_t entries. + */ + const uint8_t low_bit = 6 * led; + const uint8_t low_word = low_bit / 64; + const uint8_t high_word = (low_bit + 5) / 64; + const uint8_t low_shift = low_bit % 64; + + if (low_word == high_word) { + /* Simple case: the value belongs to one entry. */ + return extract64(s->bank0_shift_register[low_word], low_shift, 6); + } + + const uint8_t nb_bits_in_low_word = 64 - low_shift; + const uint8_t nb_bits_in_high_word = 6 - nb_bits_in_low_word; + + const uint64_t bits_in_low_word = \ + extract64(s->bank0_shift_register[low_word], low_shift, + nb_bits_in_low_word); + const uint64_t bits_in_high_word = \ + extract64(s->bank0_shift_register[high_word], 0, + nb_bits_in_high_word); + uint8_t val = 0; + + val = deposit32(val, 0, nb_bits_in_low_word, bits_in_low_word); + val = deposit32(val, nb_bits_in_low_word, nb_bits_in_high_word, + bits_in_high_word); + + return val; +} + +static uint8_t dm163_bank1(const DM163State *s, uint8_t led) +{ + const uint64_t entry = s->bank1_shift_register[led / RGB_MATRIX_NUM_COLS]; + return extract64(entry, 8 * (led % RGB_MATRIX_NUM_COLS), 8); +} + +static void dm163_lat_b_gpio_handler(void *opaque, int line, int new_state) +{ + DM163State *s = opaque; + + if (s->lat_b && !new_state) { + for (int led = 0; led < DM163_NUM_LEDS; led++) { + s->latched_outputs[led] = dm163_bank0(s, led) * dm163_bank1(s, led); + } + dm163_propagate_outputs(s); + } + + s->lat_b = new_state; + trace_dm163_lat_b(new_state); +} + +static void dm163_rst_b_gpio_handler(void *opaque, int line, int new_state) +{ + DM163State *s = opaque; + + s->rst_b = new_state; + dm163_propagate_outputs(s); + trace_dm163_rst_b(new_state); +} + +static void dm163_selbk_gpio_handler(void *opaque, int line, int new_state) +{ + DM163State *s = opaque; + + s->selbk = new_state; + trace_dm163_selbk(new_state); +} + +static void dm163_sin_gpio_handler(void *opaque, int line, int new_state) +{ + DM163State *s = opaque; + + s->sin = new_state; + trace_dm163_sin(new_state); +} + +static void dm163_rows_gpio_handler(void *opaque, int line, int new_state) +{ + DM163State *s = opaque; + + if (new_state) { + s->activated_rows |= (1 << line); + s->buffer_idx_of_row[line] = s->last_buffer_idx; + s->redraw |= (1 << line); + trace_dm163_redraw(s->redraw); + } else { + s->activated_rows &= ~(1 << line); + s->row_persistence_delay[line] = ROW_PERSISTENCE; + } + trace_dm163_activated_rows(s->activated_rows); +} + +static void dm163_invalidate_display(void *opaque) +{ + DM163State *s = (DM163State *)opaque; + s->redraw = 0xFF; + trace_dm163_redraw(s->redraw); +} + +static void update_row_persistence_delay(DM163State *s, unsigned row) +{ + if (s->row_persistence_delay[row]) { + s->row_persistence_delay[row]--; + } else { + /* + * If the ROW_PERSISTENCE delay is up, + * the row is turned off. + */ + s->buffer_idx_of_row[row] = TURNED_OFF_ROW; + s->redraw |= (1 << row); + trace_dm163_redraw(s->redraw); + } +} + +static uint32_t *update_display_of_row(DM163State *s, uint32_t *dest, + unsigned row) +{ + for (unsigned _ = 0; _ < LED_SQUARE_SIZE; _++) { + for (int x = 0; x < RGB_MATRIX_NUM_COLS * LED_SQUARE_SIZE; x++) { + /* UI layer guarantees that there's 32 bits per pixel (Mar 2024) */ + *dest++ = s->buffer[s->buffer_idx_of_row[row]][x / LED_SQUARE_SIZE]; + } + } + + dpy_gfx_update(s->console, 0, LED_SQUARE_SIZE * row, + RGB_MATRIX_NUM_COLS * LED_SQUARE_SIZE, LED_SQUARE_SIZE); + s->redraw &= ~(1 << row); + trace_dm163_redraw(s->redraw); + + return dest; +} + +static void dm163_update_display(void *opaque) +{ + DM163State *s = (DM163State *)opaque; + DisplaySurface *surface = qemu_console_surface(s->console); + uint32_t *dest; + + dest = surface_data(surface); + for (unsigned row = 0; row < RGB_MATRIX_NUM_ROWS; row++) { + update_row_persistence_delay(s, row); + if (!extract8(s->redraw, row, 1)) { + dest += LED_SQUARE_SIZE * LED_SQUARE_SIZE * RGB_MATRIX_NUM_COLS; + continue; + } + dest = update_display_of_row(s, dest, row); + } +} + +static const GraphicHwOps dm163_ops = { + .invalidate = dm163_invalidate_display, + .gfx_update = dm163_update_display, +}; + +static void dm163_realize(DeviceState *dev, Error **errp) +{ + DM163State *s = DM163(dev); + + qdev_init_gpio_in(dev, dm163_rows_gpio_handler, RGB_MATRIX_NUM_ROWS); + qdev_init_gpio_in(dev, dm163_sin_gpio_handler, 1); + qdev_init_gpio_in(dev, dm163_dck_gpio_handler, 1); + qdev_init_gpio_in(dev, dm163_rst_b_gpio_handler, 1); + qdev_init_gpio_in(dev, dm163_lat_b_gpio_handler, 1); + qdev_init_gpio_in(dev, dm163_selbk_gpio_handler, 1); + qdev_init_gpio_in(dev, dm163_en_b_gpio_handler, 1); + qdev_init_gpio_out_named(dev, &s->sout, "sout", 1); + + s->console = graphic_console_init(dev, 0, &dm163_ops, s); + qemu_console_resize(s->console, RGB_MATRIX_NUM_COLS * LED_SQUARE_SIZE, + RGB_MATRIX_NUM_ROWS * LED_SQUARE_SIZE); +} + +static void dm163_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + ResettableClass *rc = RESETTABLE_CLASS(klass); + + dc->desc = "DM163"; + dc->vmsd = &vmstate_dm163; + dc->realize = dm163_realize; + rc->phases.hold = dm163_reset_hold; + set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories); +} + +static const TypeInfo dm163_types[] = { + { + .name = TYPE_DM163, + .parent = TYPE_DEVICE, + .instance_size = sizeof(DM163State), + .class_init = dm163_class_init + } +}; + +DEFINE_TYPES(dm163_types) diff --git a/hw/display/Kconfig b/hw/display/Kconfig index 234c7de027..a4552c8ed7 100644 --- a/hw/display/Kconfig +++ b/hw/display/Kconfig @@ -140,3 +140,6 @@ config XLNX_DISPLAYPORT bool # defaults to "N", enabled by specific boards depends on PIXMAN + +config DM163 + bool diff --git a/hw/display/meson.build b/hw/display/meson.build index f93a69f70f..71e489308e 100644 --- a/hw/display/meson.build +++ b/hw/display/meson.build @@ -38,6 +38,7 @@ system_ss.add(when: 'CONFIG_NEXTCUBE', if_true: files('next-fb.c')) system_ss.add(when: 'CONFIG_VGA', if_true: files('vga.c')) system_ss.add(when: 'CONFIG_VIRTIO', if_true: files('virtio-dmabuf.c')) +system_ss.add(when: 'CONFIG_DM163', if_true: files('dm163.c')) if (config_all_devices.has_key('CONFIG_VGA_CIRRUS') or config_all_devices.has_key('CONFIG_VGA_PCI') or diff --git a/hw/display/trace-events b/hw/display/trace-events index 2336a0ca15..781f8a3320 100644 --- a/hw/display/trace-events +++ b/hw/display/trace-events @@ -177,3 +177,17 @@ macfb_ctrl_write(uint64_t addr, uint64_t value, unsigned int size) "addr 0x%"PRI macfb_sense_read(uint32_t value) "video sense: 0x%"PRIx32 macfb_sense_write(uint32_t value) "video sense: 0x%"PRIx32 macfb_update_mode(uint32_t width, uint32_t height, uint8_t depth) "setting mode to width %"PRId32 " height %"PRId32 " size %d" + +# dm163.c +dm163_redraw(uint8_t redraw) "0x%02x" +dm163_dck(unsigned new_state) "dck : %u" +dm163_en_b(unsigned new_state) "en_b : %u" +dm163_rst_b(unsigned new_state) "rst_b : %u" +dm163_lat_b(unsigned new_state) "lat_b : %u" +dm163_sin(unsigned new_state) "sin : %u" +dm163_selbk(unsigned new_state) "selbk : %u" +dm163_activated_rows(int new_state) "Activated rows : 0x%" PRIx32 "" +dm163_bits_ppi(unsigned dest_width) "dest_width : %u" +dm163_leds(int led, uint32_t value) "led %d: 0x%x" +dm163_channels(int channel, uint8_t value) "channel %d: 0x%x" +dm163_refresh_rate(uint32_t rr) "refresh rate %d"