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Date: Wed, 27 Apr 2022 21:16:17 +0200
From: Jernej Škrabec <jernej.skrabec@...il.com>
To: linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Cc: Yong Deng <yong.deng@...ewell.com>,
Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Chen-Yu Tsai <wens@...e.org>,
Samuel Holland <samuel@...lland.org>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v4 21/45] media: sun6i-csi: Implement address configuration without indirection
Dne petek, 15. april 2022 ob 17:27:47 CEST je Paul Kocialkowski napisal(a):
> Instead of calculating the planar_offset at one point and using it
> later in a dedicated function, reimplement address configuration
> with v4l2 format info in the buffer_configure function.
>
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Acked-by: Jernej Skrabec <jernej.skrabec@...il.com>
Best regards,
Jernej
> ---
> .../platform/sunxi/sun6i-csi/sun6i_csi.c | 27 ----------------
> .../platform/sunxi/sun6i-csi/sun6i_csi.h | 10 ------
> .../sunxi/sun6i-csi/sun6i_csi_capture.c | 32 ++++++++++++++++++-
> 3 files changed, 31 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
> b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c index
> c7b53e8099d3..98133c1dbf68 100644
> --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
> +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
> @@ -463,7 +463,6 @@ static void sun6i_csi_set_window(struct sun6i_csi_device
> *csi_dev) struct sun6i_csi_config *config = &csi_dev->config;
> u32 bytesperline_y;
> u32 bytesperline_c;
> - int *planar_offset = csi_dev->planar_offset;
> u32 width = config->width;
> u32 height = config->height;
> u32 hor_len = width;
> @@ -488,7 +487,6 @@ static void sun6i_csi_set_window(struct sun6i_csi_device
> *csi_dev) SUN6I_CSI_CH_VSIZE_LEN(height) |
> SUN6I_CSI_CH_VSIZE_START(0));
>
> - planar_offset[0] = 0;
> switch (config->pixelformat) {
> case V4L2_PIX_FMT_NV12_16L16:
> case V4L2_PIX_FMT_NV12:
> @@ -497,23 +495,15 @@ static void sun6i_csi_set_window(struct
> sun6i_csi_device *csi_dev) case V4L2_PIX_FMT_NV61:
> bytesperline_y = width;
> bytesperline_c = width;
> - planar_offset[1] = bytesperline_y * height;
> - planar_offset[2] = -1;
> break;
> case V4L2_PIX_FMT_YUV420:
> case V4L2_PIX_FMT_YVU420:
> bytesperline_y = width;
> bytesperline_c = width / 2;
> - planar_offset[1] = bytesperline_y * height;
> - planar_offset[2] = planar_offset[1] +
> - bytesperline_c * height / 2;
> break;
> case V4L2_PIX_FMT_YUV422P:
> bytesperline_y = width;
> bytesperline_c = width / 2;
> - planar_offset[1] = bytesperline_y * height;
> - planar_offset[2] = planar_offset[1] +
> - bytesperline_c * height;
> break;
> default: /* raw */
> dev_dbg(csi_dev->dev,
> @@ -522,8 +512,6 @@ static void sun6i_csi_set_window(struct sun6i_csi_device
> *csi_dev) bytesperline_y = (sun6i_csi_get_bpp(config->pixelformat) *
> config->width) / 8;
> bytesperline_c = 0;
> - planar_offset[1] = -1;
> - planar_offset[2] = -1;
> break;
> }
>
> @@ -547,21 +535,6 @@ int sun6i_csi_update_config(struct sun6i_csi_device
> *csi_dev, return 0;
> }
>
> -void sun6i_csi_update_buf_addr(struct sun6i_csi_device *csi_dev,
> - dma_addr_t addr)
> -{
> - regmap_write(csi_dev->regmap, SUN6I_CSI_CH_FIFO0_ADDR_REG,
> - SUN6I_CSI_ADDR_VALUE(addr + csi_dev-
>planar_offset[0]));
> - if (csi_dev->planar_offset[1] != -1)
> - regmap_write(csi_dev->regmap,
SUN6I_CSI_CH_FIFO1_ADDR_REG,
> - SUN6I_CSI_ADDR_VALUE(addr +
> - csi_dev-
>planar_offset[1]));
> - if (csi_dev->planar_offset[2] != -1)
> - regmap_write(csi_dev->regmap,
SUN6I_CSI_CH_FIFO2_ADDR_REG,
> - SUN6I_CSI_ADDR_VALUE(addr +
> - csi_dev-
>planar_offset[2]));
> -}
> -
> void sun6i_csi_set_stream(struct sun6i_csi_device *csi_dev, bool enable)
> {
> struct regmap *regmap = csi_dev->regmap;
> diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h
> b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h index
> f02656dbfd84..44fc4d486877 100644
> --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h
> +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h
> @@ -62,8 +62,6 @@ struct sun6i_csi_device {
> struct clk *clock_mod;
> struct clk *clock_ram;
> struct reset_control *reset;
> -
> - int planar_offset[3];
> };
>
> struct sun6i_csi_variant {
> @@ -94,14 +92,6 @@ int sun6i_csi_set_power(struct sun6i_csi_device *csi_dev,
> bool enable); int sun6i_csi_update_config(struct sun6i_csi_device *csi_dev,
> struct sun6i_csi_config *config);
>
> -/**
> - * sun6i_csi_update_buf_addr() - update the csi frame buffer address
> - * @csi: pointer to the csi
> - * @addr: frame buffer's physical address
> - */
> -void sun6i_csi_update_buf_addr(struct sun6i_csi_device *csi_dev,
> - dma_addr_t addr);
> -
> /**
> * sun6i_csi_set_stream() - start/stop csi streaming
> * @csi: pointer to the csi
> diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c
> b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c index
> acbd0ea62fd5..7788cbab7810 100644
> --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c
> +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c
> @@ -6,6 +6,7 @@
> */
>
> #include <linux/of.h>
> +#include <linux/regmap.h>
>
> #include <media/v4l2-device.h>
> #include <media/v4l2-event.h>
> @@ -16,6 +17,7 @@
>
> #include "sun6i_csi.h"
> #include "sun6i_csi_capture.h"
> +#include "sun6i_csi_reg.h"
>
> /* This is got from BSP sources. */
> #define MIN_WIDTH (32)
> @@ -109,13 +111,41 @@ static void
> sun6i_csi_capture_buffer_configure(struct sun6i_csi_device *csi_dev,
> struct sun6i_csi_buffer
*csi_buffer)
> {
> + struct regmap *regmap = csi_dev->regmap;
> + const struct v4l2_format_info *info;
> struct vb2_buffer *vb2_buffer;
> + unsigned int width, height;
> dma_addr_t address;
> + u32 pixelformat;
>
> vb2_buffer = &csi_buffer->v4l2_buffer.vb2_buf;
> address = vb2_dma_contig_plane_dma_addr(vb2_buffer, 0);
>
> - sun6i_csi_update_buf_addr(csi_dev, address);
> + regmap_write(regmap, SUN6I_CSI_CH_FIFO0_ADDR_REG,
> + SUN6I_CSI_ADDR_VALUE(address));
> +
> + sun6i_csi_capture_dimensions(csi_dev, &width, &height);
> + sun6i_csi_capture_format(csi_dev, &pixelformat, NULL);
> +
> + info = v4l2_format_info(pixelformat);
> + /* Unsupported formats are single-plane, so we can stop here. */
> + if (!info)
> + return;
> +
> + if (info->comp_planes > 1) {
> + address += info->bpp[0] * width * height;
> +
> + regmap_write(regmap, SUN6I_CSI_CH_FIFO1_ADDR_REG,
> + SUN6I_CSI_ADDR_VALUE(address));
> + }
> +
> + if (info->comp_planes > 2) {
> + address += info->bpp[1] * DIV_ROUND_UP(width, info-
>hdiv) *
> + DIV_ROUND_UP(height, info->vdiv);
> +
> + regmap_write(regmap, SUN6I_CSI_CH_FIFO2_ADDR_REG,
> + SUN6I_CSI_ADDR_VALUE(address));
> + }
> }
>
> static void sun6i_csi_capture_configure(struct sun6i_csi_device *csi_dev)
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