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Message-ID: <50883ec0-daac-a6d3-a5fe-86945af348bd@baylibre.com>
Date: Mon, 16 Nov 2020 09:44:43 +0100
From: Neil Armstrong <narmstrong@...libre.com>
To: Hans Verkuil <hverkuil@...all.nl>
Cc: linux-media@...r.kernel.org, linux-amlogic@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/4] media: meson: Add M2M driver for the Amlogic GE2D
Accelerator Unit
On 11/11/2020 15:20, Hans Verkuil wrote:
> On 30/10/2020 15:37, Neil Armstrong wrote:
>> The GE2D is a 2D accelerator with various features like configurable blitter
>> with alpha blending, frame rotation, scaling, format conversion and colorspace
>> conversion.
>>
>> The driver implements a Memory2Memory VB2 V4L2 streaming device permitting:
>> - 0, 90, 180, 270deg rotation
>> - horizontal/vertical flipping
>> - source cropping
>> - destination compositing
>> - 32bit/24bit/16bit format conversion
>>
>> This adds the support for the GE2D version found in the AXG SoCs Family.
>>
>> The missing features are:
>> - Source scaling
>> - Colorspace conversion
>> - Advanced alpha blending & blitting options
>>
>> Is passes v4l2-compliance SHA: ea16a7ef13a902793a5c2626b0cefc4d956147f3, 64 bits, 64-bit time_t
>>
>> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
>> ---
>> drivers/media/platform/Kconfig | 13 +
>> drivers/media/platform/Makefile | 2 +
>> drivers/media/platform/meson/ge2d/Makefile | 3 +
>> drivers/media/platform/meson/ge2d/ge2d-regs.h | 360 ++++++
>> drivers/media/platform/meson/ge2d/ge2d.c | 1105 +++++++++++++++++
>> 5 files changed, 1483 insertions(+)
>> create mode 100644 drivers/media/platform/meson/ge2d/Makefile
>> create mode 100644 drivers/media/platform/meson/ge2d/ge2d-regs.h
>> create mode 100644 drivers/media/platform/meson/ge2d/ge2d.c
>>
>> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
>> index a3cb104956d5..0522a5a76b86 100644
>> --- a/drivers/media/platform/Kconfig
>> +++ b/drivers/media/platform/Kconfig
>> @@ -274,6 +274,19 @@ config VIDEO_MEM2MEM_DEINTERLACE
>> help
>> Generic deinterlacing V4L2 driver.
>>
>> +config VIDEO_MESON_GE2D
>> + tristate "Amlogic 2D Graphic Acceleration Unit"
>> + depends on VIDEO_DEV && VIDEO_V4L2
>> + depends on ARCH_MESON || COMPILE_TEST
>> + select VIDEOBUF2_DMA_CONTIG
>> + select V4L2_MEM2MEM_DEV
>> + help
>> + This is a v4l2 driver for Amlogic GE2D 2D graphics accelerator.
>> + GE2D is a standalone 2D graphic acceleration unit, with color converter,
>> + image scaling, BitBLT & alpha blending operations.
>> +
>> + To compile this driver as a module choose m here.
>> +
>> config VIDEO_SAMSUNG_S5P_G2D
>> tristate "Samsung S5P and EXYNOS4 G2D 2d graphics accelerator driver"
>> depends on VIDEO_DEV && VIDEO_V4L2
>> diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
>> index 62b6cdc8c730..d47e0dcc65d7 100644
>> --- a/drivers/media/platform/Makefile
>> +++ b/drivers/media/platform/Makefile
>> @@ -80,3 +80,5 @@ obj-$(CONFIG_VIDEO_QCOM_CAMSS) += qcom/camss/
>> obj-$(CONFIG_VIDEO_QCOM_VENUS) += qcom/venus/
>>
>> obj-y += sunxi/
>> +
>> +obj-$(CONFIG_VIDEO_MESON_GE2D) += meson/ge2d/
>> diff --git a/drivers/media/platform/meson/ge2d/Makefile b/drivers/media/platform/meson/ge2d/Makefile
>> new file mode 100644
>> index 000000000000..450586df27d7
>> --- /dev/null
>> +++ b/drivers/media/platform/meson/ge2d/Makefile
>> @@ -0,0 +1,3 @@
>> +# SPDX-License-Identifier: GPL-2.0-only
>> +
>> +obj-$(CONFIG_VIDEO_MESON_GE2D) += ge2d.o
>> diff --git a/drivers/media/platform/meson/ge2d/ge2d-regs.h b/drivers/media/platform/meson/ge2d/ge2d-regs.h
>> new file mode 100644
>> index 000000000000..2a76dd4c0ccb
>> --- /dev/null
>> +++ b/drivers/media/platform/meson/ge2d/ge2d-regs.h
>> @@ -0,0 +1,360 @@
>> +/* SPDX-License-Identifier: GPL-2.0-or-later */
>> +/*
>> + * Copyright (C) 2020 BayLibre, SAS
>> + * Author: Neil Armstrong <narmstrong@...libre.com>
>> + * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
>> + */
>> +
>> +#ifndef __GE2D_REGS__
>> +#define __GE2D_REGS__
>> +
>> +/* Registers starts at (GE2D_REG(0x8a0 * 4) */
>> +#define GE2D_REG(x) ((0x8a0 + (x)) * 4)
>> +
>> +#define GE2D_GEN_CTRL0 GE2D_REG(0x00)
>> +
>> +#define GE2D_DST_BYTEMASK_ONLY BIT(31)
>> +#define GE2D_DST_BITMASK_EN BIT(30)
>> +#define GE2D_SRC2_KEY_EN BIT(29)
>> +#define GE2D_SRC2_KEY_MODE BIT(28)
>> +#define GE2D_SRC1_KEY_EN BIT(27)
>> +#define GE2D_SRC1_KEY_MODE BIT(26)
>> +#define GE2D_DST1_8B_MODE_SEL GENMASK(25, 24)
>> +#define GE2D_DST_CLIP_MODE BIT(23)
>> +#define GE2D_SRC2_8B_MODE_SEL GENMASK(16, 15)
>> +#define GE2D_SRC2_FILL_MODE BIT(14)
>> +#define GE2D_SRC2_PIC_STRUCT GENMASK(13, 12)
>> +#define GE2D_SRC2_X_YC_RATIO BIT(11)
>> +#define GE2D_SRC1_8B_MODE_SEL GENMASK(6, 5)
>> +#define GE2D_SRC1_FILL_MODE BIT(4)
>> +#define GE2D_SRC1_LUT_EN BIT(3)
>> +#define GE2D_SRC1_PIC_STRUCT GENMASK(2, 1)
>> +
>> +#define GE2D_GEN_CTRL1 GE2D_REG(0x01)
>> +
>> +#define GE2D_SOFT_RST BIT(31)
>> +#define GE2D_DST_WRITE_RESP_CNT_RST BIT(30)
>> +#define GE2D_DST_WRITE_RESP_CNT_ADD_DIS BIT(29)
>> +#define GE2D_COLOR_CONVERSION_MODE1 BIT(26)
>> +#define GE2D_INTERRUPT_CTRL GENMASK(25, 24)
>> +#define GE2D_SRC2_BURST_SIZE_CTRL GENMASK(23, 22)
>> +#define GE2D_SRC1_BURST_SIZE_CTRL GENMASK(21, 16)
>> +#define GE2D_DST1_PIC_STRUCT GENMASK(15, 14)
>> +#define GE2D_SRC_RD_CTRL GENMASK(13, 12)
>> +#define GE2D_DST2_URGENT_EN BIT(11)
>> +#define GE2D_SRC1_URGENT_EN BIT(10)
>> +#define GE2D_SRC2_URGENT_EN BIT(9)
>> +#define GE2D_DST1_URGENT_EN BIT(8)
>> +#define GE2D_SRC1_GB_ALPHA GENMASK(7, 0)
>> +
>> +#define GE2D_GEN_CTRL2 GE2D_REG(0x02)
>> +
>> +#define GE2D_ALPHA_CONVERSION_MODE0 BIT(31)
>> +#define GE2D_COLOR_CONVERSION_MODE0 BIT(30)
>> +#define GE2D_SRC1_GB_ALPHA_EN BIT(29)
>> +#define GE2D_DST1_COLOR_ROUND_MODE BIT(28)
>> +#define GE2D_SRC2_COLOR_EXPAND_MODE BIT(27)
>> +#define GE2D_SRC2_ALPHA_EXPAND_MODE BIT(26)
>> +#define GE2D_SRC1_COLOR_EXPAND_MODE BIT(25)
>> +#define GE2D_SRC1_ALPHA_EXPAND_MODE BIT(24)
>> +#define GE2D_DST_LITTLE_ENDIAN BIT(23)
>> +#define GE2D_DST1_COLOR_MAP GENMASK(22, 19)
>> +#define GE2D_ALU_MULT_MODE BIT(18)
>> +#define GE2D_DST1_FORMAT GENMASK(17, 16)
>> +#define GE2D_SRC2_LITTLE_ENDIAN BIT(15)
>> +#define GE2D_SRC2_COLOR_MAP GENMASK(14, 11)
>> +#define GE2D_ALPHA_CONVERSION_MODE1 BIT(10)
>> +#define GE2D_SRC2_FORMAT GENMASK(9, 8)
>> +#define GE2D_SRC1_LITTLE_ENDIAN BIT(7)
>> +#define GE2D_SRC1_COLOR_MAP GENMASK(6, 3)
>> +#define GE2D_SRC1_DEEPCOLOR BIT(2)
>> +#define GE2D_SRC1_FORMAT GENMASK(1, 0)
>> +
>> +#define GE2D_FORMAT_8BIT 0
>> +#define GE2D_FORMAT_16BIT 1
>> +#define GE2D_FORMAT_24BIT 2
>> +#define GE2D_FORMAT_32BIT 3
>> +
>> +/* 16 bit */
>> +#define GE2D_COLOR_MAP_YUV422 0
>> +#define GE2D_COLOR_MAP_RGB655 1
>> +#define GE2D_COLOR_MAP_YUV655 1
>> +#define GE2D_COLOR_MAP_RGB844 2
>> +#define GE2D_COLOR_MAP_YUV844 2
>> +#define GE2D_COLOR_MAP_RGBA6442 3
>> +#define GE2D_COLOR_MAP_YUVA6442 3
>> +#define GE2D_COLOR_MAP_RGBA4444 4
>> +#define GE2D_COLOR_MAP_YUVA4444 4
>> +#define GE2D_COLOR_MAP_RGB565 5
>> +#define GE2D_COLOR_MAP_YUV565 5
>> +#define GE2D_COLOR_MAP_ARGB4444 6
>> +#define GE2D_COLOR_MAP_AYUV4444 6
>> +#define GE2D_COLOR_MAP_ARGB1555 7
>> +#define GE2D_COLOR_MAP_AYUV1555 7
>> +#define GE2D_COLOR_MAP_RGBA4642 8
>> +#define GE2D_COLOR_MAP_YUVA4642 8
>> +
>> +/* 24 bit */
>> +#define GE2D_COLOR_MAP_RGB888 0
>> +#define GE2D_COLOR_MAP_YUV444 0
>> +#define GE2D_COLOR_MAP_RGBA5658 1
>> +#define GE2D_COLOR_MAP_YUVA5658 1
>> +#define GE2D_COLOR_MAP_ARGB8565 2
>> +#define GE2D_COLOR_MAP_AYUV8565 2
>> +#define GE2D_COLOR_MAP_RGBA6666 3
>> +#define GE2D_COLOR_MAP_YUVA6666 3
>> +#define GE2D_COLOR_MAP_ARGB6666 4
>> +#define GE2D_COLOR_MAP_AYUV6666 4
>> +#define GE2D_COLOR_MAP_BGR888 5
>> +#define GE2D_COLOR_MAP_VUY888 5
>> +
>> +/* 32 bit */
>> +#define GE2D_COLOR_MAP_RGBA8888 0
>> +#define GE2D_COLOR_MAP_YUVA8888 0
>> +#define GE2D_COLOR_MAP_ARGB8888 1
>> +#define GE2D_COLOR_MAP_AYUV8888 1
>> +#define GE2D_COLOR_MAP_ABGR8888 2
>> +#define GE2D_COLOR_MAP_AVUY8888 2
>> +#define GE2D_COLOR_MAP_BGRA8888 3
>> +#define GE2D_COLOR_MAP_VUYA8888 3
>> +
>> +#define GE2D_CMD_CTRL GE2D_REG(0x03)
>> +
>> +#define GE2D_SRC2_FILL_COLOR_EN BIT(9)
>> +#define GE2D_SRC1_FILL_COLOR_EN BIT(8)
>> +#define GE2D_DST_XY_SWAP BIT(7)
>> +#define GE2D_DST_X_REV BIT(6)
>> +#define GE2D_DST_Y_REV BIT(5)
>> +#define GE2D_SRC2_X_REV BIT(4)
>> +#define GE2D_SRC2_Y_REV BIT(3)
>> +#define GE2D_SRC1_X_REV BIT(2)
>> +#define GE2D_SRC1_Y_REV BIT(1)
>> +#define GE2D_CBUS_CMD_WR BIT(0)
>> +
>> +#define GE2D_STATUS0 GE2D_REG(0x04)
>> +
>> +#define GE2D_DST_WRITE_RSP_CNT GENMASK(28, 17)
>> +#define GE2D_DP_STATUS GENMASK(16, 7)
>> +#define GE2D_R1CMD_RDY BIT(6)
>> +#define GE2D_R2CMD_RDY BIT(5)
>> +#define GE2D_PDPCMD_VALID BIT(4)
>> +#define GE2D_DPCMD_RDY BIT(3)
>> +#define GE2D_BUF_CMD_VALID BIT(2)
>> +#define GE2D_CURR_CMD_VALID BIT(1)
>> +#define GE2D_GE2D_BUSY BIT(0)
>> +
>> +#define GE2D_STATUS1 GE2D_REG(0x05)
>> +
>> +#define GE2D_WR_DST1_STATUS GENMASK(29, 16)
>> +#define GE2D_RD_SRC2_FIFO_EMPTY BIT(15)
>> +#define GE2D_RD_SRC2_FIFO_OVERFLOW BIT(14)
>> +#define GE2D_RD_SRC2_STATE_Y GENMASK(13, 12)
>> +#define GE2D_RD_SRC2_WIN_ERR BIT(11)
>> +#define GE2D_RD_SRC2_CMD_BUSY BIT(10)
>> +#define GE2D_RD_SRC1_FIFO_EMPTY BIT(9)
>> +#define GE2D_RD_SRC1_FIFO_OVERFLOW BIT(8)
>> +#define GE2D_RD_SRC1_STATE_CR GENMASK(7, 6)
>> +#define GE2D_RD_SRC1_STATE_CB GENMASK(5, 4)
>> +#define GE2D_RD_SRC1_STATE_Y GENMASK(3, 2)
>> +#define GE2D_RD_SRC1_WIN_ERR BIT(1)
>> +#define GE2D_RD_SRC1_CMD_BUSY BIT(0)
>> +
>> +#define GE2D_SRC1_DEF_COLOR GE2D_REG(0x06)
>> +
>> +#define GE2D_COLOR_R_Y GENMASK(31, 24)
>> +#define GE2D_COLOR_B_CB GENMASK(23, 16)
>> +#define GE2D_COLOR_B_CR GENMASK(15, 8)
>> +#define GE2D_COLOR_ALPHA GENMASK(7, 0)
>> +
>> +#define GE2D_SRC1_CLIPX_START_END GE2D_REG(0x07)
>> +
>> +#define GE2D_START_EXTRA BIT(31) /* For GE2D_SRC1_CLIPX/Y_START_END */
>> +#define GE2D_START_EXTRA0 BIT(30) /* For GE2D_SRC1_X/Y_START_END */
>> +#define GE2D_START GENMASK(28, 16)
>> +#define GE2D_END_EXTRA BIT(15) /* For GE2D_SRC1_CLIPX/Y_START_END */
>> +#define GE2D_END_EXTRA0 BIT(14) /* For GE2D_SRC1_X/Y_START_END */
>> +#define GE2D_END GENMASK(12, 0)
>> +
>> +#define GE2D_SRC1_CLIPY_START_END GE2D_REG(0x08)
>> +#define GE2D_SRC1_CANVAS GE2D_REG(0x09)
>> +
>> +#define GE2D_SRC1_CANVAS_ADDR GENMASK(31, 24)
>> +
>> +#define GE2D_SRC1_X_START_END GE2D_REG(0x0a)
>> +#define GE2D_SRC1_Y_START_END GE2D_REG(0x0b)
>> +#define GE2D_SRC1_LUT_ADDR GE2D_REG(0x0c)
>> +
>> +#define GE2D_LUT_READ BIT(8)
>> +#define GE2D_LUT_ADDR GENMASK(7, 0)
>> +
>> +#define GE2D_SRC1_LUT_DAT GE2D_REG(0x0d)
>> +#define GE2D_SRC1_FMT_CTRL GE2D_REG(0x0e)
>> +#define GE2D_SRC2_DEF_COLOR GE2D_REG(0x0f)
>> +#define GE2D_SRC2_CLIPX_START_END GE2D_REG(0x10)
>> +#define GE2D_SRC2_CLIPY_START_END GE2D_REG(0x11)
>> +#define GE2D_SRC2_X_START_END GE2D_REG(0x12)
>> +#define GE2D_SRC2_Y_START_END GE2D_REG(0x13)
>> +#define GE2D_DST_CLIPX_START_END GE2D_REG(0x14)
>> +#define GE2D_DST_CLIPY_START_END GE2D_REG(0x15)
>> +#define GE2D_DST_X_START_END GE2D_REG(0x16)
>> +#define GE2D_DST_Y_START_END GE2D_REG(0x17)
>> +#define GE2D_SRC2_DST_CANVAS GE2D_REG(0x18)
>> +
>> +#define GE2D_DST2_CANVAS_ADDR GENMASK(23, 16)
>> +#define GE2D_SRC2_CANVAS_ADDR GENMASK(15, 8)
>> +#define GE2D_DST1_CANVAS_ADDR GENMASK(7, 0)
>> +
>> +#define GE2D_VSC_START_PHASE_STEP GE2D_REG(0x19)
>> +#define GE2D_VSC_PHASE_SLOPE GE2D_REG(0x1a)
>> +#define GE2D_VSC_INI_CTRL GE2D_REG(0x1b)
>> +#define GE2D_HSC_START_PHASE_STEP GE2D_REG(0x1c)
>> +#define GE2D_HSC_PHASE_SLOPE GE2D_REG(0x1d)
>> +#define GE2D_HSC_INI_CTRL GE2D_REG(0x1e)
>> +#define GE2D_HSC_ADV_CTRL GE2D_REG(0x1f)
>> +#define GE2D_SC_MISC_CTRL GE2D_REG(0x20)
>> +#define GE2D_VSC_NRND_POINT GE2D_REG(0x21)
>> +#define GE2D_VSC_NRND_PHASE GE2D_REG(0x22)
>> +#define GE2D_HSC_NRND_POINT GE2D_REG(0x23)
>> +#define GE2D_HSC_NRND_PHASE GE2D_REG(0x24)
>> +#define GE2D_MATRIX_PRE_OFFSET GE2D_REG(0x25)
>> +#define GE2D_MATRIX_COEF00_01 GE2D_REG(0x26)
>> +#define GE2D_MATRIX_COEF02_10 GE2D_REG(0x27)
>> +#define GE2D_MATRIX_COEF11_12 GE2D_REG(0x28)
>> +#define GE2D_MATRIX_COEF20_21 GE2D_REG(0x29)
>> +#define GE2D_MATRIX_COEF22_CTRL GE2D_REG(0x2a)
>> +#define GE2D_MATRIX_OFFSET GE2D_REG(0x2b)
>> +#define GE2D_ALU_OP_CTRL GE2D_REG(0x2c)
>> +
>> +#define GE2D_SRC1_COLOR_MULT_ALPHA_SEL GENMASK(26, 25)
>> +#define GE2D_SRC2_COLOR_MULT_ALPHA_SEL BIT(24)
>> +#define GE2D_ALU_BLEND_MODE GENMASK(22, 20)
>> +
>> +#define OPERATION_ADD 0 /* Cd = Cs*Fs+Cd*Fd */
>> +#define OPERATION_SUB 1 /* Cd = Cs*Fs-Cd*Fd */
>> +#define OPERATION_REVERSE_SUB 2 /* Cd = Cd*Fd-Cs*Fs */
>> +#define OPERATION_MIN 3 /* Cd = Min(Cd*Fd,Cs*Fs) */
>> +#define OPERATION_MAX 4 /* Cd = Max(Cd*Fd,Cs*Fs) */
>> +#define OPERATION_LOGIC 5
>> +
>> +#define GE2D_ALU_SRC_COLOR_BLEND_FACTOR GENMASK(19, 16)
>> +#define GE2D_ALU_DST_COLOR_BLEND_FACTOR GENMASK(15, 12)
>> +
>> +#define COLOR_FACTOR_ZERO 0
>> +#define COLOR_FACTOR_ONE 1
>> +#define COLOR_FACTOR_SRC_COLOR 2
>> +#define COLOR_FACTOR_ONE_MINUS_SRC_COLOR 3
>> +#define COLOR_FACTOR_DST_COLOR 4
>> +#define COLOR_FACTOR_ONE_MINUS_DST_COLOR 5
>> +#define COLOR_FACTOR_SRC_ALPHA 6
>> +#define COLOR_FACTOR_ONE_MINUS_SRC_ALPHA 7
>> +#define COLOR_FACTOR_DST_ALPHA 8
>> +#define COLOR_FACTOR_ONE_MINUS_DST_ALPHA 9
>> +#define COLOR_FACTOR_CONST_COLOR 10
>> +#define COLOR_FACTOR_ONE_MINUS_CONST_COLOR 11
>> +#define COLOR_FACTOR_CONST_ALPHA 12
>> +#define COLOR_FACTOR_ONE_MINUS_CONST_ALPHA 13
>> +#define COLOR_FACTOR_SRC_ALPHA_SATURATE 14
>> +
>> +#define GE2D_ALU_OPERATION_LOGIC GENMASK(15, 12)
>> +
>> +#define LOGIC_OPERATION_CLEAR 0
>> +#define LOGIC_OPERATION_COPY 1
>> +#define LOGIC_OPERATION_NOOP 2
>> +#define LOGIC_OPERATION_SET 3
>> +#define LOGIC_OPERATION_COPY_INVERT 4
>> +#define LOGIC_OPERATION_INVERT 5
>> +#define LOGIC_OPERATION_AND_REVERSE 6
>> +#define LOGIC_OPERATION_OR_REVERSE 7
>> +#define LOGIC_OPERATION_AND 8
>> +#define LOGIC_OPERATION_OR 9
>> +#define LOGIC_OPERATION_NAND 10
>> +#define LOGIC_OPERATION_NOR 11
>> +#define LOGIC_OPERATION_XOR 12
>> +#define LOGIC_OPERATION_EQUIV 13
>> +#define LOGIC_OPERATION_AND_INVERT 14
>> +#define LOGIC_OPERATION_OR_INVERT 15
>> +
>> +#define GE2D_ALU_ALPHA_BLEND_MODE GENMASK(10, 8)
>> +#define GE2D_ALU_SRC_ALPHA_BLEND_FACTOR GENMASK(7, 4)
>> +#define GE2D_ALU_DST_ALPHA_BLEND_FACTOR GENMASK(3, 0)
>> +
>> +#define ALPHA_FACTOR_ZERO 0
>> +#define ALPHA_FACTOR_ONE 1
>> +#define ALPHA_FACTOR_SRC_ALPHA 2
>> +#define ALPHA_FACTOR_ONE_MINUS_SRC_ALPHA 3
>> +#define ALPHA_FACTOR_DST_ALPHA 4
>> +#define ALPHA_FACTOR_ONE_MINUS_DST_ALPHA 5
>> +#define ALPHA_FACTOR_CONST_ALPHA 6
>> +#define ALPHA_FACTOR_ONE_MINUS_CONST_ALPHA 7
>> +
>> +#define GE2D_ALU_ALPHA_OPERATION_LOGIC GENMASK(3, 0)
>> +
>> +#define GE2D_ALU_COLOR_OP(__op, __src_factor, __dst_factor) \
>> + (FIELD_PREP(GE2D_ALU_BLEND_MODE, __op) | \
>> + FIELD_PREP(GE2D_ALU_SRC_COLOR_BLEND_FACTOR, __src_factor) | \
>> + FIELD_PREP(GE2D_ALU_DST_COLOR_BLEND_FACTOR, __dst_factor))
>> +
>> +#define GE2D_ALU_DO_COLOR_OPERATION_LOGIC(__op, __src_factor) \
>> + GE2D_ALU_COLOR_OP(OPERATION_LOGIC, __src_factor, __op)
>> +
>> +#define GE2D_ALU_ALPHA_OP(__op, __src_factor, __dst_factor) \
>> + (FIELD_PREP(GE2D_ALU_ALPHA_BLEND_MODE, __op) | \
>> + FIELD_PREP(GE2D_ALU_SRC_ALPHA_BLEND_FACTOR, __src_factor) | \
>> + FIELD_PREP(GE2D_ALU_DST_ALPHA_BLEND_FACTOR, __dst_factor))
>> +
>> +#define GE2D_ALU_DO_ALPHA_OPERATION_LOGIC(__op, __src_factor) \
>> + GE2D_ALU_ALPHA_OP(OPERATION_LOGIC, __src_factor, __op)
>> +
>> +#define GE2D_ALU_CONST_COLOR GE2D_REG(0x2d)
>> +#define GE2D_SRC1_KEY GE2D_REG(0x2e)
>> +#define GE2D_SRC1_KEY_MASK GE2D_REG(0x2f)
>> +#define GE2D_SRC2_KEY GE2D_REG(0x30)
>> +#define GE2D_SRC2_KEY_MASK GE2D_REG(0x31)
>> +#define GE2D_DST_BITMASK GE2D_REG(0x32)
>> +#define GE2D_DP_ONOFF_CTRL GE2D_REG(0x33)
>> +#define GE2D_SCALE_COEF_IDX GE2D_REG(0x34)
>> +#define GE2D_SCALE_COEF GE2D_REG(0x35)
>> +#define GE2D_SRC_OUTSIDE_ALPHA GE2D_REG(0x36)
>> +#define GE2D_ANTIFLICK_CTRL0 GE2D_REG(0x38)
>> +#define GE2D_ANTIFLICK_CTRL1 GE2D_REG(0x39)
>> +#define GE2D_ANTIFLICK_COLOR_FILT0 GE2D_REG(0x3a)
>> +#define GE2D_ANTIFLICK_COLOR_FILT1 GE2D_REG(0x3b)
>> +#define GE2D_ANTIFLICK_COLOR_FILT2 GE2D_REG(0x3c)
>> +#define GE2D_ANTIFLICK_COLOR_FILT3 GE2D_REG(0x3d)
>> +#define GE2D_ANTIFLICK_ALPHA_FILT0 GE2D_REG(0x3e)
>> +#define GE2D_ANTIFLICK_ALPHA_FILT1 GE2D_REG(0x3f)
>> +#define GE2D_ANTIFLICK_ALPHA_FILT2 GE2D_REG(0x40)
>> +#define GE2D_ANTIFLICK_ALPHA_FILT3 GE2D_REG(0x41)
>> +#define GE2D_SRC1_RANGE_MAP_Y_CTRL GE2D_REG(0x43)
>> +#define GE2D_SRC1_RANGE_MAP_CB_CTRL GE2D_REG(0x44)
>> +#define GE2D_SRC1_RANGE_MAP_CR_CTRL GE2D_REG(0x45)
>> +#define GE2D_ARB_BURST_NUM GE2D_REG(0x46)
>> +#define GE2D_TID_TOKEN GE2D_REG(0x47)
>> +#define GE2D_GEN_CTRL3 GE2D_REG(0x48)
>> +
>> +#define GE2D_DST2_BYTEMASK_VAL GENMASK(31, 28)
>> +#define GE2D_DST2_PIC_STRUCT GENMASK(27, 26)
>> +#define GE2D_DST2_8B_MODE_SEL GENMASK(25, 24)
>> +#define GE2D_DST2_COLOR_MAP GENMASK(22, 19)
>> +#define GE2D_DST2_FORMAT GENMASK(17, 16)
>> +#define GE2D_DST2_COLOR_ROUND_MODE BIT(14)
>> +#define GE2D_DST2_X_DISCARD_MODE GENMASK(13, 12)
>> +#define GE2D_DST2_Y_DISCARD_MODE GENMASK(11, 10)
>> +#define GE2D_DST2_ENABLE BIT(8)
>> +#define GE2D_DST1_X_DISCARD_MODE GENMASK(5, 4)
>> +#define GE2D_DST1_Y_DISCARD_MODE GENMASK(3, 2)
>> +#define GE2D_DST1_ENABLE BIT(0)
>> +
>> +#define GE2D_STATUS2 GE2D_REG(0x49)
>> +#define GE2D_GEN_CTRL4 GE2D_REG(0x4a)
>> +#define GE2D_DST1_BADDR_CTRL GE2D_REG(0x51)
>> +#define GE2D_DST1_STRIDE_CTRL GE2D_REG(0x52)
>> +
>> +#define GE2D_STRIDE_SIZE GENMASK(19, 0)
>> +
>> +#define GE2D_SRC1_BADDR_CTRL GE2D_REG(0x53)
>> +#define GE2D_SRC1_STRIDE_CTRL GE2D_REG(0x54)
>> +#define GE2D_SRC2_BADDR_CTRL GE2D_REG(0x55)
>> +#define GE2D_SRC2_STRIDE_CTRL GE2D_REG(0x56)
>> +
>> +#endif /* __GE2D_REGS__ */
>> diff --git a/drivers/media/platform/meson/ge2d/ge2d.c b/drivers/media/platform/meson/ge2d/ge2d.c
>> new file mode 100644
>> index 000000000000..439bdc5151fa
>> --- /dev/null
>> +++ b/drivers/media/platform/meson/ge2d/ge2d.c
>> @@ -0,0 +1,1105 @@
>> +// SPDX-License-Identifier: GPL-2.0-or-later
>> +/*
>> + * Copyright (C) 2020 BayLibre, SAS
>> + * Author: Neil Armstrong <narmstrong@...libre.com>
>> + */
>> +
>> +#include <linux/clk.h>
>> +#include <linux/delay.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/reset.h>
>> +#include <linux/sched.h>
>> +#include <linux/slab.h>
>> +#include <linux/timer.h>
>> +#include <linux/regmap.h>
>> +
>> +#include <linux/platform_device.h>
>> +#include <media/v4l2-device.h>
>> +#include <media/v4l2-event.h>
>> +#include <media/v4l2-ioctl.h>
>> +#include <media/v4l2-mem2mem.h>
>> +#include <media/v4l2-ctrls.h>
>> +#include <media/videobuf2-v4l2.h>
>> +#include <media/videobuf2-dma-contig.h>
>> +
>> +#include "ge2d-regs.h"
>> +
>> +#define GE2D_NAME "meson-ge2d"
>> +
>> +#define DEFAULT_WIDTH 100
>> +#define DEFAULT_HEIGHT 100
>> +
>> +#define MAX_WIDTH 8191
>> +#define MAX_HEIGHT 8191
>> +
>> +/*
>> + * Missing features:
>> + * - Scaling
>> + * - Simple 1/2 vertical scaling
>> + * - YUV input support
>> + * - Source global alpha
>> + * - Colorspace conversion
>> + */
>> +
>> +struct ge2d_fmt {
>> + u32 fourcc;
>> + bool alpha;
>> + bool le;
>> + unsigned int depth;
>> + unsigned int hw_fmt;
>> + unsigned int hw_map;
>> +};
>> +
>> +struct ge2d_frame {
>> + struct vb2_v4l2_buffer *buf;
>> +
>> + /* Image Format */
>> + struct v4l2_pix_format pix_fmt;
>> +
>> + /* Crop */
>> + struct v4l2_rect crop;
>> +
>> + /* Image format */
>> + const struct ge2d_fmt *fmt;
>> +};
>> +
>> +struct ge2d_ctx {
>> + struct v4l2_fh fh;
>> + struct meson_ge2d *ge2d;
>> + struct ge2d_frame in;
>> + struct ge2d_frame out;
>> + struct v4l2_ctrl_handler ctrl_handler;
>> +
>> + bool streamon_out, streamon_cap;
>> + unsigned long sequence_out, sequence_cap;
>> +
>> + /* Control values */
>> + u32 hflip;
>> + u32 vflip;
>> + u32 xy_swap;
>> +};
>> +
>> +struct meson_ge2d {
>> + struct v4l2_device v4l2_dev;
>> + struct v4l2_m2m_dev *m2m_dev;
>> + struct video_device *vfd;
>> +
>> + struct device *dev;
>> + struct regmap *map;
>> + struct clk *clk;
>> +
>> + /* vb2 queue lock */
>> + struct mutex mutex;
>> + /* device access spinlock */
>> + spinlock_t ctrl_lock;
>> +
>> + struct ge2d_ctx *curr;
>> +};
>> +
>> +static void vidioc_setup_cap_fmt(struct ge2d_ctx *ctx, struct v4l2_pix_format *f);
>> +
>> +#define FMT(_fourcc, _alpha, _depth, _map) \
>> +{ \
>> + .fourcc = _fourcc, \
>> + .alpha = (_alpha), \
>> + .depth = (_depth), \
>> + .hw_fmt = GE2D_FORMAT_ ## _depth ## BIT, \
>> + .hw_map = GE2D_COLOR_MAP_ ## _map, \
>> +}
>> +
>> +/* TOFIX Handle the YUV input formats */
>> +static const struct ge2d_fmt formats[] = {
>> + /* FOURCC Alpha HW FMT HW MAP */
>> + FMT(V4L2_PIX_FMT_XRGB32, false, 32, BGRA8888),
>> + FMT(V4L2_PIX_FMT_RGB32, true, 32, BGRA8888),
>> + FMT(V4L2_PIX_FMT_ARGB32, true, 32, BGRA8888),
>> + FMT(V4L2_PIX_FMT_RGBX32, false, 32, ABGR8888),
>> + FMT(V4L2_PIX_FMT_RGBA32, true, 32, ABGR8888),
>> + FMT(V4L2_PIX_FMT_BGRX32, false, 32, RGBA8888),
>> + FMT(V4L2_PIX_FMT_BGRA32, true, 32, RGBA8888),
>> + FMT(V4L2_PIX_FMT_BGR32, true, 32, ARGB8888),
>> + FMT(V4L2_PIX_FMT_ABGR32, true, 32, ARGB8888),
>> + FMT(V4L2_PIX_FMT_XBGR32, false, 32, ARGB8888),
>> +
>> + FMT(V4L2_PIX_FMT_RGB24, false, 24, BGR888),
>> + FMT(V4L2_PIX_FMT_BGR24, false, 24, RGB888),
>> +
>> + FMT(V4L2_PIX_FMT_XRGB555X, false, 16, ARGB1555),
>> + FMT(V4L2_PIX_FMT_ARGB555X, true, 16, ARGB1555),
>> + FMT(V4L2_PIX_FMT_RGB565, false, 16, RGB565),
>> + FMT(V4L2_PIX_FMT_RGBX444, false, 16, RGBA4444),
>> + FMT(V4L2_PIX_FMT_RGBA444, true, 16, RGBA4444),
>> + FMT(V4L2_PIX_FMT_XRGB444, false, 16, ARGB4444),
>> + FMT(V4L2_PIX_FMT_ARGB444, true, 16, ARGB4444),
>> +};
>> +
>> +#define NUM_FORMATS ARRAY_SIZE(formats)
>> +
>> +static const struct ge2d_fmt *find_fmt(struct v4l2_format *f)
>> +{
>> + unsigned int i;
>> +
>> + for (i = 0; i < NUM_FORMATS; i++) {
>> + if (formats[i].fourcc == f->fmt.pix.pixelformat)
>> + return &formats[i];
>> + }
>> +
>> + /*
>> + * TRY_FMT/S_FMT should never return an error when the requested format
>> + * is not supported. Drivers should always return a valid format,
>> + * preferably a format that is as widely supported by applications as
>> + * possible.
>> + */
>> + return &formats[0];
>> +}
>> +
>> +static struct ge2d_frame *get_frame(struct ge2d_ctx *ctx,
>> + enum v4l2_buf_type type)
>> +{
>> + switch (type) {
>> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
>> + return &ctx->in;
>> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
>> + return &ctx->out;
>> + default:
>> + return ERR_PTR(-EINVAL);
>
> I wouldn't mess with returning an error pointer here. For the default
> case just add a WARN_ON and return &ctx->in or ->out.
>
> It's really a driver bug if you end up there.
ok
>
>> + }
>> +}
>> +
>> +static void ge2d_hw_start(struct meson_ge2d *ge2d)
>> +{
>> + struct ge2d_ctx *ctx = ge2d->curr;
>> + u32 reg;
>> +
>> + /* Reset */
>> + regmap_update_bits(ge2d->map, GE2D_GEN_CTRL1,
>> + GE2D_SOFT_RST, GE2D_SOFT_RST);
>> + regmap_update_bits(ge2d->map, GE2D_GEN_CTRL1,
>> + GE2D_SOFT_RST, 0);
>> +
>> + usleep_range(100, 200);
>> +
>> + /* Implement CANVAS for non-AXG */
>> + regmap_write(ge2d->map, GE2D_SRC1_BADDR_CTRL,
>> + (vb2_dma_contig_plane_dma_addr(&ctx->in.buf->vb2_buf, 0) + 7) >> 3);
>> + regmap_write(ge2d->map, GE2D_SRC1_STRIDE_CTRL,
>> + (ctx->in.pix_fmt.bytesperline + 7) >> 3);
>> + regmap_write(ge2d->map, GE2D_SRC2_BADDR_CTRL,
>> + (vb2_dma_contig_plane_dma_addr(&ctx->out.buf->vb2_buf, 0) + 7) >> 3);
>> + regmap_write(ge2d->map, GE2D_SRC2_STRIDE_CTRL,
>> + (ctx->out.pix_fmt.bytesperline + 7) >> 3);
>> + regmap_write(ge2d->map, GE2D_DST1_BADDR_CTRL,
>> + (vb2_dma_contig_plane_dma_addr(&ctx->out.buf->vb2_buf, 0) + 7) >> 3);
>> + regmap_write(ge2d->map, GE2D_DST1_STRIDE_CTRL,
>> + (ctx->out.pix_fmt.bytesperline + 7) >> 3);
>> +
>> + regmap_write(ge2d->map, GE2D_GEN_CTRL0, 0);
>> + regmap_write(ge2d->map, GE2D_GEN_CTRL1,
>> + FIELD_PREP(GE2D_INTERRUPT_CTRL, 2) |
>> + FIELD_PREP(GE2D_SRC2_BURST_SIZE_CTRL, 3) |
>> + FIELD_PREP(GE2D_SRC1_BURST_SIZE_CTRL, 0x3f));
>> +
>> + regmap_write(ge2d->map, GE2D_GEN_CTRL2,
>> + GE2D_SRC1_LITTLE_ENDIAN |
>> + GE2D_SRC2_LITTLE_ENDIAN |
>> + GE2D_DST_LITTLE_ENDIAN |
>> + FIELD_PREP(GE2D_DST1_COLOR_MAP, ctx->out.fmt->hw_map) |
>> + FIELD_PREP(GE2D_DST1_FORMAT, ctx->out.fmt->hw_fmt) |
>> + FIELD_PREP(GE2D_SRC2_COLOR_MAP, ctx->out.fmt->hw_map) |
>> + FIELD_PREP(GE2D_SRC2_FORMAT, ctx->out.fmt->hw_fmt) |
>> + FIELD_PREP(GE2D_SRC1_COLOR_MAP, ctx->in.fmt->hw_map) |
>> + FIELD_PREP(GE2D_SRC1_FORMAT, ctx->in.fmt->hw_fmt));
>> + regmap_write(ge2d->map, GE2D_GEN_CTRL3,
>> + GE2D_DST1_ENABLE);
>> +
>> + regmap_write(ge2d->map, GE2D_SRC1_CLIPY_START_END,
>> + FIELD_PREP(GE2D_START, ctx->in.crop.top) |
>> + FIELD_PREP(GE2D_END, ctx->in.crop.top + ctx->in.crop.height));
>> + regmap_write(ge2d->map, GE2D_SRC1_CLIPX_START_END,
>> + FIELD_PREP(GE2D_START, ctx->in.crop.left) |
>> + FIELD_PREP(GE2D_END, ctx->in.crop.left + ctx->in.crop.width));
>> + regmap_write(ge2d->map, GE2D_SRC2_CLIPY_START_END,
>> + FIELD_PREP(GE2D_START, ctx->out.crop.top) |
>> + FIELD_PREP(GE2D_END, ctx->out.crop.top + ctx->out.crop.height));
>> + regmap_write(ge2d->map, GE2D_SRC2_CLIPX_START_END,
>> + FIELD_PREP(GE2D_START, ctx->out.crop.left) |
>> + FIELD_PREP(GE2D_END, ctx->out.crop.left + ctx->out.crop.width));
>> + regmap_write(ge2d->map, GE2D_DST_CLIPY_START_END,
>> + FIELD_PREP(GE2D_START, ctx->out.crop.top) |
>> + FIELD_PREP(GE2D_END, ctx->out.crop.top + ctx->out.crop.height));
>> + regmap_write(ge2d->map, GE2D_DST_CLIPX_START_END,
>> + FIELD_PREP(GE2D_START, ctx->out.crop.left) |
>> + FIELD_PREP(GE2D_END, ctx->out.crop.left + ctx->out.crop.width));
>> +
>> + regmap_write(ge2d->map, GE2D_SRC1_Y_START_END,
>> + FIELD_PREP(GE2D_END, ctx->in.pix_fmt.height));
>> + regmap_write(ge2d->map, GE2D_SRC1_X_START_END,
>> + FIELD_PREP(GE2D_END, ctx->in.pix_fmt.width));
>> + regmap_write(ge2d->map, GE2D_SRC2_Y_START_END,
>> + FIELD_PREP(GE2D_END, ctx->out.pix_fmt.height));
>> + regmap_write(ge2d->map, GE2D_SRC2_X_START_END,
>> + FIELD_PREP(GE2D_END, ctx->out.pix_fmt.width));
>> + regmap_write(ge2d->map, GE2D_DST_Y_START_END,
>> + FIELD_PREP(GE2D_END, ctx->out.pix_fmt.height));
>> + regmap_write(ge2d->map, GE2D_DST_X_START_END,
>> + FIELD_PREP(GE2D_END, ctx->out.pix_fmt.width));
>> +
>> + /* Color, no blend, use source color */
>> + reg = GE2D_ALU_DO_COLOR_OPERATION_LOGIC(LOGIC_OPERATION_COPY,
>> + COLOR_FACTOR_SRC_COLOR);
>> +
>> + if (ctx->in.fmt->alpha && ctx->out.fmt->alpha)
>> + /* Take source alpha */
>> + reg |= GE2D_ALU_DO_ALPHA_OPERATION_LOGIC(LOGIC_OPERATION_COPY,
>> + COLOR_FACTOR_SRC_ALPHA);
>> + else if (!ctx->out.fmt->alpha)
>> + /* Set alpha to 0 */
>> + reg |= GE2D_ALU_DO_ALPHA_OPERATION_LOGIC(LOGIC_OPERATION_SET,
>> + COLOR_FACTOR_ZERO);
>> + else
>> + /* Keep original alpha */
>> + reg |= GE2D_ALU_DO_ALPHA_OPERATION_LOGIC(LOGIC_OPERATION_COPY,
>> + COLOR_FACTOR_DST_ALPHA);
>> +
>> + regmap_write(ge2d->map, GE2D_ALU_OP_CTRL, reg);
>> +
>> + /* Start */
>> + regmap_write(ge2d->map, GE2D_CMD_CTRL,
>> + (ctx->xy_swap ? GE2D_DST_XY_SWAP : 0) |
>> + (ctx->hflip ? GE2D_SRC1_Y_REV : 0) |
>> + (ctx->vflip ? GE2D_SRC1_X_REV : 0) |
>> + GE2D_CBUS_CMD_WR);
>> +}
>> +
>> +static void device_run(void *priv)
>> +{
>> + struct ge2d_ctx *ctx = priv;
>> + struct meson_ge2d *ge2d = ctx->ge2d;
>> + unsigned long flags;
>> +
>> + spin_lock_irqsave(&ge2d->ctrl_lock, flags);
>> +
>> + ge2d->curr = ctx;
>> +
>> + ctx->in.buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
>> + ctx->out.buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
>> +
>> + ge2d_hw_start(ge2d);
>> +
>> + spin_unlock_irqrestore(&ge2d->ctrl_lock, flags);
>> +}
>> +
>> +static irqreturn_t ge2d_isr(int irq, void *priv)
>> +{
>> + struct meson_ge2d *ge2d = priv;
>> + u32 intr;
>> +
>> + regmap_read(ge2d->map, GE2D_STATUS0, &intr);
>> +
>> + if (!(intr & GE2D_GE2D_BUSY)) {
>> + struct vb2_v4l2_buffer *src, *dst;
>> + struct ge2d_ctx *ctx = ge2d->curr;
>> +
>> + ge2d->curr = NULL;
>> +
>> + src = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
>> + dst = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
>> +
>> + src->sequence = ctx->sequence_out++;
>> + dst->sequence = ctx->sequence_cap++;
>> +
>> + dst->timecode = src->timecode;
>> + dst->vb2_buf.timestamp = src->vb2_buf.timestamp;
>> + dst->flags = src->flags;
>> +
>> + v4l2_m2m_buf_done(src, VB2_BUF_STATE_DONE);
>> + v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
>> + v4l2_m2m_job_finish(ge2d->m2m_dev, ctx->fh.m2m_ctx);
>> + }
>> +
>> + return IRQ_HANDLED;
>> +}
>> +
>> +static const struct v4l2_m2m_ops ge2d_m2m_ops = {
>> + .device_run = device_run,
>> +};
>> +
>> +static int ge2d_queue_setup(struct vb2_queue *vq,
>> + unsigned int *nbuffers, unsigned int *nplanes,
>> + unsigned int sizes[], struct device *alloc_devs[])
>> +{
>> + struct ge2d_ctx *ctx = vb2_get_drv_priv(vq);
>> + struct ge2d_frame *f = get_frame(ctx, vq->type);
>> +
>> + if (IS_ERR(f))
>> + return PTR_ERR(f);
[for me: remove]
>> +
>> + if (*nplanes)
>> + return sizes[0] < f->pix_fmt.sizeimage ? -EINVAL : 0;
>> +
>> + sizes[0] = f->pix_fmt.sizeimage;
>> + *nplanes = 1;
>> +
>> + return 0;
>> +}
>> +
>> +static int ge2d_buf_prepare(struct vb2_buffer *vb)
>> +{
>> + struct ge2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
>> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
>> + struct ge2d_frame *f = get_frame(ctx, vb->vb2_queue->type);
>> +
>> + if (IS_ERR(f))
>> + return PTR_ERR(f);
[for me: remove]
>> +
>> + vbuf->field = V4L2_FIELD_NONE;
>> +
>> + vb2_set_plane_payload(vb, 0, f->pix_fmt.sizeimage);
>> +
>> + return 0;
>> +}
>> +
>> +static void ge2d_buf_queue(struct vb2_buffer *vb)
>> +{
>> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
>> + struct ge2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
>> +
>> + v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
>> +}
>> +
>> +static int ge2d_start_streaming(struct vb2_queue *vq, unsigned int count)
>> +{
>> + struct ge2d_ctx *ctx = vb2_get_drv_priv(vq);
>> +
>> + if (V4L2_TYPE_IS_OUTPUT(vq->type))
>> + ctx->streamon_out = true;
>> + else
>> + ctx->streamon_cap = true;
>> +
>> + if (!ctx->streamon_out)
>> + return 0;
>> +
>> + ctx->sequence_out = 0;
>> + ctx->sequence_cap = 0;
>
> This is wrong, which sequence counter you zero depends on vq->type.
> It would only be an issue if userspace stops and restarts just one of the
> queues.
>
> This function can just be:
>
> static int ge2d_start_streaming(struct vb2_queue *vq, unsigned int count)
> {
> struct ge2d_ctx *ctx = vb2_get_drv_priv(vq);
>
> if (V4L2_TYPE_IS_OUTPUT(vq->type)) {
> ctx->streamon_out = true;
> ctx->sequence_out = 0;
> } else {
> ctx->streamon_cap = true;
> ctx->sequence_cap = 0;
> }
> return 0;
> }
>
ok
>
>> +
>> + return 0;
>> +}
>> +
>> +static void ge2d_stop_streaming(struct vb2_queue *vq)
>> +{
>> + struct ge2d_ctx *ctx = vb2_get_drv_priv(vq);
>> + struct vb2_v4l2_buffer *vbuf;
>> +
>> + if (V4L2_TYPE_IS_OUTPUT(vq->type))
>> + ctx->streamon_out = false;
>> + else
>> + ctx->streamon_cap = false;
>> +
>> + for (;;) {
>> + if (V4L2_TYPE_IS_OUTPUT(vq->type))
>> + vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
>> + else
>> + vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
>> + if (!vbuf)
>> + break;
>> + v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
>> + }
>> +}
>> +
>> +static const struct vb2_ops ge2d_qops = {
>> + .queue_setup = ge2d_queue_setup,
>> + .buf_prepare = ge2d_buf_prepare,
>> + .buf_queue = ge2d_buf_queue,
>> + .start_streaming = ge2d_start_streaming,
>> + .stop_streaming = ge2d_stop_streaming,
>> + .wait_prepare = vb2_ops_wait_prepare,
>> + .wait_finish = vb2_ops_wait_finish,
>> +};
>> +
>> +static int
>> +queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
>> +{
>> + struct ge2d_ctx *ctx = priv;
>> + int ret;
>> +
>> + src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
>> + src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
>> + src_vq->drv_priv = ctx;
>> + src_vq->ops = &ge2d_qops;
>> + src_vq->mem_ops = &vb2_dma_contig_memops;
>> + src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
>> + src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
>> + src_vq->lock = &ctx->ge2d->mutex;
>> + src_vq->dev = ctx->ge2d->v4l2_dev.dev;
>> +
>> + ret = vb2_queue_init(src_vq);
>> + if (ret)
>> + return ret;
>> +
>> + dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
>> + dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
>> + dst_vq->drv_priv = ctx;
>> + dst_vq->ops = &ge2d_qops;
>> + dst_vq->mem_ops = &vb2_dma_contig_memops;
>> + dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
>> + dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
>> + dst_vq->lock = &ctx->ge2d->mutex;
>> + dst_vq->dev = ctx->ge2d->v4l2_dev.dev;
>> +
>> + return vb2_queue_init(dst_vq);
>> +}
>> +
>> +static int ge2d_s_ctrl(struct v4l2_ctrl *ctrl)
>> +{
>> + struct ge2d_ctx *ctx = container_of(ctrl->handler, struct ge2d_ctx,
>> + ctrl_handler);
>> + struct v4l2_pix_format fmt;
>
> Shouldn't this be zeroed? I.e.: fmt = {};
> Unless vidioc_setup_cap_fmt() does that already?
Sort of !
>
>> + struct vb2_queue *vq;
>> + unsigned long flags;
>> +
>> + spin_lock_irqsave(&ctx->ge2d->ctrl_lock, flags);
>> + switch (ctrl->id) {
>> + case V4L2_CID_HFLIP:
>> + ctx->hflip = ctrl->val;
>> + break;
>> + case V4L2_CID_VFLIP:
>> + ctx->vflip = ctrl->val;
>> + break;
>> + case V4L2_CID_ROTATE:
>> + vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
>> + if (vb2_is_busy(vq))
>> + return -EBUSY;
>> +
>> + if (ctrl->val == 90) {
>> + ctx->hflip = 0;
>> + ctx->vflip = 0;
>> + ctx->xy_swap = 1;
>> + } else if (ctrl->val == 180) {
>> + ctx->hflip = 1;
>> + ctx->vflip = 1;
>> + ctx->xy_swap = 0;
>> + } else if (ctrl->val == 270) {
>> + ctx->hflip = 1;
>> + ctx->vflip = 1;
>> + ctx->xy_swap = 1;
>> + } else {
>> + ctx->hflip = 0;
>> + ctx->vflip = 0;
>> + ctx->xy_swap = 0;
>> + }
>> +
>> + vidioc_setup_cap_fmt(ctx, &fmt);
>
> Ah, this is why you needed the forward reference to this function.
>
> Why not just move the ctrl-related functions further down in the
> source so you don't need that forward reference?
Sure
>
>> +
>> + if (fmt.width != ctx->out.pix_fmt.width ||
>> + fmt.height != ctx->out.pix_fmt.width ||
>> + fmt.bytesperline > ctx->out.pix_fmt.bytesperline ||
>> + fmt.sizeimage > ctx->out.pix_fmt.sizeimage)
>> + memcpy(&ctx->out.pix_fmt, &fmt, sizeof(struct v4l2_pix_format));
>
> This can be replaced by 'ctx->out.pix_fmt = pix;'
>
> This 'if' needs a comment, it's not clear what is happening here.
ok
>
>> +
>> + break;
>> + }
>> + spin_unlock_irqrestore(&ctx->ge2d->ctrl_lock, flags);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_ctrl_ops ge2d_ctrl_ops = {
>> + .s_ctrl = ge2d_s_ctrl,
>> +};
>> +
>> +static int ge2d_setup_ctrls(struct ge2d_ctx *ctx)
>> +{
>> + struct meson_ge2d *ge2d = ctx->ge2d;
>> +
>> + v4l2_ctrl_handler_init(&ctx->ctrl_handler, 4);
>> +
>> + v4l2_ctrl_new_std(&ctx->ctrl_handler, &ge2d_ctrl_ops,
>> + V4L2_CID_HFLIP, 0, 1, 1, 0);
>> +
>> + v4l2_ctrl_new_std(&ctx->ctrl_handler, &ge2d_ctrl_ops,
>> + V4L2_CID_VFLIP, 0, 1, 1, 0);
>> +
>> + v4l2_ctrl_new_std(&ctx->ctrl_handler, &ge2d_ctrl_ops,
>> + V4L2_CID_ROTATE, 0, 270, 90, 0);
>> +
>> + if (ctx->ctrl_handler.error) {
>> + int err = ctx->ctrl_handler.error;
>> +
>> + v4l2_err(&ge2d->v4l2_dev, "%s failed\n", __func__);
>> + v4l2_ctrl_handler_free(&ctx->ctrl_handler);
>> + return err;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static const struct ge2d_frame def_frame = {
>> + .pix_fmt = {
>> + .width = DEFAULT_WIDTH,
>> + .height = DEFAULT_HEIGHT,
>> + .field = V4L2_FIELD_NONE,
>> + },
>> + .crop.left = 0,
>> + .crop.top = 0,
>
> No need for these two fields.
ok
>
>> + .crop.width = DEFAULT_WIDTH,
>> + .crop.height = DEFAULT_HEIGHT,
>> + .fmt = &formats[0],
>> +};
>> +
>> +static int ge2d_open(struct file *file)
>> +{
>> + struct meson_ge2d *ge2d = video_drvdata(file);
>> + struct ge2d_ctx *ctx = NULL;
>> + int ret = 0;
>> +
>> + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
>> + if (!ctx)
>> + return -ENOMEM;
>> + ctx->ge2d = ge2d;
>> +
>> + /* Set default formats */
>> + ctx->in = def_frame;
>> + ctx->out = def_frame;
>> +
>> + /* Initialize default frames */
>> + ctx->in.pix_fmt.bytesperline = ALIGN((ctx->in.pix_fmt.width * ctx->in.fmt->depth) / 8, 8);
>> + ctx->in.pix_fmt.sizeimage = ctx->in.pix_fmt.height * ctx->in.pix_fmt.bytesperline;
>> + memcpy(&ctx->out.pix_fmt, &ctx->in.pix_fmt, sizeof(struct v4l2_pix_format));
>
> ctx->out.pix_fmt = ctx->in.pix_fmt;
ok
>
> Actually, why not just set these two fields (bytesperline and sizeimage) in def_frame?
> Then you can delete these four lines and def_frame is always correct.
Because it's not static and depends on the default pix fmt, it was the smartest way I found...
>
>> +
>> + if (mutex_lock_interruptible(&ge2d->mutex)) {
>> + kfree(ctx);
>> + return -ERESTARTSYS;
>> + }
>> + ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(ge2d->m2m_dev, ctx, &queue_init);
>> + if (IS_ERR(ctx->fh.m2m_ctx)) {
>> + ret = PTR_ERR(ctx->fh.m2m_ctx);
>> + mutex_unlock(&ge2d->mutex);
>> + kfree(ctx);
>> + return ret;
>> + }
>> + v4l2_fh_init(&ctx->fh, video_devdata(file));
>> + file->private_data = &ctx->fh;
>> + v4l2_fh_add(&ctx->fh);
>> +
>> + ge2d_setup_ctrls(ctx);
>> +
>> + /* Write the default values to the ctx struct */
>> + v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
>> +
>> + ctx->fh.ctrl_handler = &ctx->ctrl_handler;
>> + mutex_unlock(&ge2d->mutex);
>> +
>> + return 0;
>> +}
>> +
>> +static int ge2d_release(struct file *file)
>> +{
>> + struct ge2d_ctx *ctx =
>> + container_of(file->private_data, struct ge2d_ctx, fh);
>> + struct meson_ge2d *ge2d = ctx->ge2d;
>> +
>> + mutex_lock(&ge2d->mutex);
>> +
>> + v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
>> +
>> + v4l2_ctrl_handler_free(&ctx->ctrl_handler);
>> + v4l2_fh_del(&ctx->fh);
>> + v4l2_fh_exit(&ctx->fh);
>> + kfree(ctx);
>> +
>> + mutex_unlock(&ge2d->mutex);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_file_operations ge2d_fops = {
>> + .owner = THIS_MODULE,
>> + .open = ge2d_open,
>> + .release = ge2d_release,
>> + .poll = v4l2_m2m_fop_poll,
>> + .unlocked_ioctl = video_ioctl2,
>> + .mmap = v4l2_m2m_fop_mmap,
>> +};
>> +
>> +static int
>> +vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *cap)
>> +{
>> + strscpy(cap->driver, GE2D_NAME, sizeof(cap->driver));
>> + strscpy(cap->card, GE2D_NAME, sizeof(cap->card));
>> + strscpy(cap->bus_info, "platform:" GE2D_NAME, sizeof(cap->bus_info));
>> +
>> + return 0;
>> +}
>> +
>> +static int vidioc_enum_fmt(struct file *file, void *priv, struct v4l2_fmtdesc *f)
>> +{
>> + const struct ge2d_fmt *fmt;
>> +
>> + if (f->index >= NUM_FORMATS)
>> + return -EINVAL;
>> +
>> + fmt = &formats[f->index];
>> + f->pixelformat = fmt->fourcc;
>> +
>> + return 0;
>> +}
>> +
>> +static int vidioc_g_selection(struct file *file, void *priv,
>> + struct v4l2_selection *s)
>> +{
>> + struct ge2d_ctx *ctx = priv;
>> + struct ge2d_frame *f;
>> + bool use_frame = false;
>> +
>> + f = get_frame(ctx, s->type);
>> + if (IS_ERR(f))
>> + return PTR_ERR(f);
>
> Rather than relying on get_frame errors, just add a check for s->type
> here. Ditto for s_selection.
ok
>
>> +
>> + switch (s->target) {
>> + case V4L2_SEL_TGT_COMPOSE_DEFAULT:
>> + case V4L2_SEL_TGT_COMPOSE_BOUNDS:
>> + if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
>> + return -EINVAL;
>> + break;
>> + case V4L2_SEL_TGT_CROP_DEFAULT:
>> + case V4L2_SEL_TGT_CROP_BOUNDS:
>> + if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
>> + return -EINVAL;
>> + break;
>> + case V4L2_SEL_TGT_COMPOSE:
>> + if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
>> + return -EINVAL;
>> + use_frame = true;
>> + break;
>> + case V4L2_SEL_TGT_CROP:
>> + if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
>> + return -EINVAL;
>> + use_frame = true;
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + if (use_frame) {
>> + s->r = f->crop;
>> + } else {
>> + s->r.left = 0;
>> + s->r.top = 0;
>> + s->r.width = f->pix_fmt.width;
>> + s->r.height = f->pix_fmt.height;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int vidioc_s_selection(struct file *file, void *priv,
>> + struct v4l2_selection *s)
>> +{
>> + struct ge2d_ctx *ctx = priv;
>> + struct meson_ge2d *ge2d = ctx->ge2d;
>> + struct ge2d_frame *f;
>> + int ret = 0;
>> +
>> + f = get_frame(ctx, s->type);
>> + if (IS_ERR(f))
>> + return PTR_ERR(f);
[for me: remove]
>> +
>> + switch (s->target) {
>> + case V4L2_SEL_TGT_COMPOSE:
>> + /*
>> + * COMPOSE target is only valid for capture buffer type, return
>> + * error for output buffer type
>> + */
>> + if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
>> + return -EINVAL;
>> + break;
>> + case V4L2_SEL_TGT_CROP:
>> + /*
>> + * CROP target is only valid for output buffer type, return
>> + * error for capture buffer type
>> + */
>> + if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
>> + return -EINVAL;
>> + break;
>> + /*
>> + * bound and default crop/compose targets are invalid targets to
>> + * try/set
>> + */
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + if (s->r.top < 0 || s->r.left < 0) {
>> + v4l2_err(&ge2d->v4l2_dev,
>> + "doesn't support negative values for top & left.\n");
>> + return -EINVAL;
>> + }
>> +
>> + if (s->r.left + s->r.width > f->pix_fmt.width ||
>> + s->r.top + s->r.height > f->pix_fmt.height ||
>> + s->r.width < 0 || s->r.height < 0) {
>
> width & height in v4l2_rect are unsigned, so can't be negative.
ok
>
>> + v4l2_err(&ge2d->v4l2_dev, "unsupported crop value.\n");
>
> crop -> rectangle
ok
>
>> + return -EINVAL;
>> + }
>> +
>> + f->crop = s->r;
>> +
>> + return ret;
>> +}
>> +
>> +static void vidioc_setup_cap_fmt(struct ge2d_ctx *ctx, struct v4l2_pix_format *f)
>> +{
>> + struct ge2d_frame *frm_out = get_frame(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
>> +
>> + memcpy(f, &frm_out->pix_fmt, sizeof(struct v4l2_pix_format));
>
> *f = frm_out->pix_fmt;
ok
>
>> +
>> + if (ctx->xy_swap) {
>> + f->width = frm_out->pix_fmt.height;
>> + f->height = frm_out->pix_fmt.width;
>> + }
>> +}
>> +
>> +static int vidioc_try_fmt_cap(struct file *file, void *priv, struct v4l2_format *f)
>> +{
>> + const struct ge2d_fmt *fmt = find_fmt(f);
>> + struct ge2d_ctx *ctx = priv;
>> + struct v4l2_pix_format fmt_cap;
>> +
>> + vidioc_setup_cap_fmt(ctx, &fmt_cap);
>> +
>> + fmt_cap.pixelformat = fmt->fourcc;
>> +
>> + fmt_cap.bytesperline = max(f->fmt.pix.bytesperline,
>> + ALIGN((fmt_cap.width * fmt->depth) >> 3, 8));
>> +
>> + fmt_cap.sizeimage = max(f->fmt.pix.sizeimage,
>> + fmt_cap.height * fmt_cap.bytesperline);
>> +
>> + memcpy(&f->fmt.pix, &fmt_cap, sizeof(struct v4l2_pix_format));
>
> f->fmt.pix = fmt_cap;
ok
>
>> +
>> + return 0;
>> +}
>> +
>> +static int vidioc_s_fmt_cap(struct file *file, void *priv, struct v4l2_format *f)
>> +{
>> + struct ge2d_ctx *ctx = priv;
>> + struct meson_ge2d *ge2d = ctx->ge2d;
>> + struct vb2_queue *vq;
>> + struct ge2d_frame *frm;
>> + int ret = 0;
>> +
>> + /* Adjust all values accordingly to the hardware capabilities
>> + * and chosen format.
>> + */
>> + ret = vidioc_try_fmt_cap(file, priv, f);
>> + if (ret)
>> + return ret;
>> +
>> + vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
>> + if (vb2_is_busy(vq)) {
>> + v4l2_err(&ge2d->v4l2_dev, "queue (%d) bust\n", f->type);
>> + return -EBUSY;
>> + }
>> +
>> + frm = get_frame(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
>> + if (IS_ERR(frm))
>> + return PTR_ERR(frm);
>
> Can't happen.
ok
>
>> +
>> + memcpy(&frm->pix_fmt, &f->fmt.pix, sizeof(struct v4l2_pix_format));
>> + frm->fmt = find_fmt(f);
>> + f->fmt.pix.pixelformat = frm->fmt->fourcc;
>> +
>> + /* Reset crop settings */
>> + frm->crop.left = 0;
>> + frm->crop.top = 0;
>> + frm->crop.width = frm->pix_fmt.width;
>> + frm->crop.height = frm->pix_fmt.height;
>> +
>> + return 0;
>> +}
>> +
>> +static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
>> +{
>> + struct ge2d_ctx *ctx = priv;
>> + struct vb2_queue *vq;
>> + struct ge2d_frame *frm;
>> +
>> + vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
>> + if (!vq)
>> + return -EINVAL;
>> +
>> + frm = get_frame(ctx, f->type);
>> + if (IS_ERR(frm))
>> + return PTR_ERR(frm);
>
> Ditto.
>
> I won't repeat myself, the same thing happens several times below.
ok will remove all this dead code
>
>> +
>> + memcpy(&f->fmt.pix, &frm->pix_fmt, sizeof(struct v4l2_pix_format));
>
> Use assignment. Same several times below.
ok
>
>> + f->fmt.pix.pixelformat = frm->fmt->fourcc;
>> +
>> + return 0;
>> +}
>> +
>> +static int vidioc_try_fmt_out(struct file *file, void *priv, struct v4l2_format *f)
>> +{
>> + const struct ge2d_fmt *fmt = find_fmt(f);
>> +
>> + f->fmt.pix.field = V4L2_FIELD_NONE;
>> + f->fmt.pix.pixelformat = fmt->fourcc;
>> +
>> + if (f->fmt.pix.width > MAX_WIDTH)
>> + f->fmt.pix.width = MAX_WIDTH;
>> + if (f->fmt.pix.height > MAX_HEIGHT)
>> + f->fmt.pix.height = MAX_HEIGHT;
>> +
>> + if (f->fmt.pix.width < 0)
>> + f->fmt.pix.width = 0;
>> + if (f->fmt.pix.height < 0)
>> + f->fmt.pix.height = 0;
>> +
>> + f->fmt.pix.bytesperline = max(f->fmt.pix.bytesperline,
>> + ALIGN((f->fmt.pix.width * fmt->depth) >> 3, 8));
>> +
>> + f->fmt.pix.sizeimage = max(f->fmt.pix.sizeimage,
>> + f->fmt.pix.height * f->fmt.pix.bytesperline);
>> +
>> + return 0;
>> +}
>> +
>> +static int vidioc_s_fmt_out(struct file *file, void *priv, struct v4l2_format *f)
>> +{
>> + struct ge2d_ctx *ctx = priv;
>> + struct meson_ge2d *ge2d = ctx->ge2d;
>> + struct vb2_queue *vq;
>> + struct ge2d_frame *frm, *frm_cap;
>> + int ret = 0;
>> +
>> + /* Adjust all values accordingly to the hardware capabilities
>> + * and chosen format.
>> + */
>> + ret = vidioc_try_fmt_out(file, priv, f);
>> + if (ret)
>> + return ret;
>> +
>> + vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
>> + if (vb2_is_busy(vq)) {
>> + v4l2_err(&ge2d->v4l2_dev, "queue (%d) bust\n", f->type);
>> + return -EBUSY;
>> + }
>> +
>> + frm = get_frame(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
>> + if (IS_ERR(frm))
>> + return PTR_ERR(frm);
[for me: remove]
>> + frm_cap = get_frame(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
>> + if (IS_ERR(frm_cap))
>> + return PTR_ERR(frm_cap);
[for me: remove]
>> +
>> + memcpy(&frm->pix_fmt, &f->fmt.pix, sizeof(struct v4l2_pix_format));
[for me: rm->pix_fmt = f->fmt.pix]
>> + frm->fmt = find_fmt(f);
>> + f->fmt.pix.pixelformat = frm->fmt->fourcc;
>> +
>> + /* Reset crop settings */
>> + frm->crop.left = 0;
>> + frm->crop.top = 0;
>> + frm->crop.width = frm->pix_fmt.width;
>> + frm->crop.height = frm->pix_fmt.height;
>> +
>> + /* Propagate settings to capture */
>> + vidioc_setup_cap_fmt(ctx, &frm_cap->pix_fmt);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct v4l2_ioctl_ops ge2d_ioctl_ops = {
>> + .vidioc_querycap = vidioc_querycap,
>> +
>> + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
>> + .vidioc_g_fmt_vid_cap = vidioc_g_fmt,
>> + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_cap,
>> + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_cap,
>> +
>> + .vidioc_enum_fmt_vid_out = vidioc_enum_fmt,
>> + .vidioc_g_fmt_vid_out = vidioc_g_fmt,
>> + .vidioc_try_fmt_vid_out = vidioc_try_fmt_out,
>> + .vidioc_s_fmt_vid_out = vidioc_s_fmt_out,
>> +
>> + .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
>> + .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
>> + .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
>> + .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
>> + .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
>> + .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
>> + .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
>> +
>> + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
>> + .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
>> +
>> + .vidioc_streamon = v4l2_m2m_ioctl_streamon,
>> + .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
>> +
>> + .vidioc_g_selection = vidioc_g_selection,
>> + .vidioc_s_selection = vidioc_s_selection,
>> +};
>> +
>> +static const struct video_device ge2d_videodev = {
>> + .name = "meson-ge2d",
>> + .fops = &ge2d_fops,
>> + .ioctl_ops = &ge2d_ioctl_ops,
>> + .minor = -1,
>> + .release = video_device_release,
>> + .vfl_dir = VFL_DIR_M2M,
>> + .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,
>> +};
>> +
>> +static const struct regmap_config meson_ge2d_regmap_conf = {
>> + .reg_bits = 8,
>> + .val_bits = 32,
>> + .reg_stride = 4,
>> + .max_register = GE2D_SRC2_STRIDE_CTRL,
>> +};
>> +
>> +static int ge2d_probe(struct platform_device *pdev)
>> +{
>> + struct reset_control *rst;
>> + struct video_device *vfd;
>> + struct meson_ge2d *ge2d;
>> + struct resource *res;
>> + void __iomem *regs;
>> + int ret = 0;
>> + int irq;
>> +
>> + if (!pdev->dev.of_node)
>> + return -ENODEV;
>> +
>> + ge2d = devm_kzalloc(&pdev->dev, sizeof(*ge2d), GFP_KERNEL);
>> + if (!ge2d)
>> + return -ENOMEM;
>> +
>> + ge2d->dev = &pdev->dev;
>> + spin_lock_init(&ge2d->ctrl_lock);
>> + mutex_init(&ge2d->mutex);
>> +
>> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> + regs = devm_ioremap_resource(ge2d->dev, res);
>> + if (IS_ERR(regs))
>> + return PTR_ERR(regs);
>> +
>> + ge2d->map = devm_regmap_init_mmio(ge2d->dev, regs,
>> + &meson_ge2d_regmap_conf);
>> + if (IS_ERR(ge2d->map))
>> + return PTR_ERR(ge2d->map);
>> +
>> + irq = platform_get_irq(pdev, 0);
>> + ret = devm_request_irq(ge2d->dev, irq, ge2d_isr, 0,
>> + dev_name(ge2d->dev), ge2d);
>> + if (ret < 0) {
>> + dev_err(ge2d->dev, "failed to request irq\n");
>> + return ret;
>> + }
>> +
>> + rst = devm_reset_control_get(ge2d->dev, NULL);
>> + if (IS_ERR(rst)) {
>> + dev_err(ge2d->dev, "failed to get core reset controller\n");
>> + return PTR_ERR(rst);
>> + }
>> +
>> + ge2d->clk = devm_clk_get(ge2d->dev, NULL);
>> + if (IS_ERR(ge2d->clk)) {
>> + dev_err(ge2d->dev, "failed to get clock\n");
>> + return PTR_ERR(ge2d->clk);
>> + }
>> +
>> + reset_control_assert(rst);
>> + udelay(1);
>> + reset_control_deassert(rst);
>> +
>> + ret = clk_prepare_enable(ge2d->clk);
>> + if (ret) {
>> + dev_err(ge2d->dev, "Cannot enable ge2d sclk: %d\n", ret);
>> + return ret;
>> + }
>> +
>> + ret = v4l2_device_register(&pdev->dev, &ge2d->v4l2_dev);
>> + if (ret)
>> + goto disable_clks;
>> +
>> + vfd = video_device_alloc();
>> + if (!vfd) {
>> + v4l2_err(&ge2d->v4l2_dev, "Failed to allocate video device\n");
>> + goto unreg_v4l2_dev;
>> + }
>> +
>> + *vfd = ge2d_videodev;
>> + vfd->lock = &ge2d->mutex;
>> + vfd->v4l2_dev = &ge2d->v4l2_dev;
>> +
>> + video_set_drvdata(vfd, ge2d);
>> + ge2d->vfd = vfd;
>> +
>> + platform_set_drvdata(pdev, ge2d);
>> + ge2d->m2m_dev = v4l2_m2m_init(&ge2d_m2m_ops);
>> + if (IS_ERR(ge2d->m2m_dev)) {
>> + v4l2_err(&ge2d->v4l2_dev, "Failed to init mem2mem device\n");
>> + ret = PTR_ERR(ge2d->m2m_dev);
>> + goto unreg_video_dev;
>> + }
>> +
>> + ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
>> + if (ret) {
>> + v4l2_err(&ge2d->v4l2_dev, "Failed to register video device\n");
>> + goto rel_vdev;
>> + }
>> +
>> + v4l2_info(&ge2d->v4l2_dev, "Registered %s as /dev/%s\n",
>> + vfd->name, video_device_node_name(vfd));
>> +
>> + return 0;
>> +
>> +rel_vdev:
>> + video_device_release(vfd);
>> +unreg_video_dev:
>> + video_unregister_device(ge2d->vfd);
>> +unreg_v4l2_dev:
>> + v4l2_device_unregister(&ge2d->v4l2_dev);
>> +disable_clks:
>> + clk_disable_unprepare(ge2d->clk);
>> +
>> + return ret;
>> +}
>> +
>> +static int ge2d_remove(struct platform_device *pdev)
>> +{
>> + struct meson_ge2d *ge2d = platform_get_drvdata(pdev);
>> +
>> + v4l2_m2m_release(ge2d->m2m_dev);
>> + video_unregister_device(ge2d->vfd);
>> + v4l2_device_unregister(&ge2d->v4l2_dev);
>> +
>> + clk_disable_unprepare(ge2d->clk);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct of_device_id meson_ge2d_match[] = {
>> + {
>> + .compatible = "amlogic,axg-ge2d",
>> + },
>> + {},
>> +};
>> +
>> +MODULE_DEVICE_TABLE(of, meson_ge2d_match);
>> +
>> +static struct platform_driver ge2d_drv = {
>> + .probe = ge2d_probe,
>> + .remove = ge2d_remove,
>> + .driver = {
>> + .name = "meson-ge2d",
>> + .of_match_table = meson_ge2d_match,
>> + },
>> +};
>> +
>> +module_platform_driver(ge2d_drv);
>> +
>> +MODULE_AUTHOR("Neil Armstrong <narmstrong@...libre.com>");
>> +MODULE_DESCRIPTION("Amlogic 2D Graphic Acceleration Unit");
>> +MODULE_LICENSE("GPL");
>>
>
Thanks for the review !
Neil
> Regards,
>
> Hans
>
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