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Message-ID: <d11ad801-e387-dcd8-1737-1cbc69dea046@xs4all.nl>
Date: Tue, 16 Mar 2021 10:40:58 +0100
From: Hans Verkuil <hverkuil@...all.nl>
To: Robert Foss <robert.foss@...aro.org>, agross@...nel.org,
bjorn.andersson@...aro.org, todor.too@...il.com,
mchehab@...nel.org, robh+dt@...nel.org,
angelogioacchino.delregno@...ainline.org,
linux-arm-msm@...r.kernel.org, linux-media@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
AngeloGioacchino Del Regno <kholk11@...il.com>,
Sakari Ailus <sakari.ailus@....fi>,
Andrey Konovalov <andrey.konovalov@...aro.org>
Cc: Rob Herring <robh@...nel.org>, Tomasz Figa <tfiga@...omium.org>,
Azam Sadiq Pasha Kapatrala Syed <akapatra@...cinc.com>,
Sarvesh Sridutt <Sarvesh.Sridutt@...rtwirelesscompute.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Jonathan Marek <jonathan@...ek.ca>
Subject: Re: [PATCH v8 06/22] media: camss: Refactor VFE HW version support
On 15/03/2021 16:59, Robert Foss wrote:
> In order to support Qualcomm ISP hardware architectures that diverge
> from older architectures, the VFE subdevice driver needs to be refactored
> to better abstract the different ISP architectures.
>
> Gen1 represents the CAMSS ISP architecture. The ISP architecture developed
> after CAMSS, Titan, will be referred to as Gen2.
>
> Signed-off-by: Robert Foss <robert.foss@...aro.org>
> Reviewed-by: Andrey Konovalov <andrey.konovalov@...aro.org>
> ---
>
>
<snip>
> diff --git a/drivers/media/platform/qcom/camss/camss-vfe.h b/drivers/media/platform/qcom/camss/camss-vfe.h
> index 5bce6736e4bb..ceff4985b1cc 100644
> --- a/drivers/media/platform/qcom/camss/camss-vfe.h
> +++ b/drivers/media/platform/qcom/camss/camss-vfe.h
> @@ -17,15 +17,26 @@
> #include <media/v4l2-subdev.h>
>
> #include "camss-video.h"
> +#include "camss-vfe-gen1.h"
>
> #define MSM_VFE_PAD_SINK 0
> #define MSM_VFE_PAD_SRC 1
> #define MSM_VFE_PADS_NUM 2
>
> -#define MSM_VFE_LINE_NUM 4
> #define MSM_VFE_IMAGE_MASTERS_NUM 7
> #define MSM_VFE_COMPOSITE_IRQ_NUM 4
>
> +/* VFE halt timeout */
> +#define VFE_HALT_TIMEOUT_MS 100
> +/* Frame drop value. VAL + UPDATES - 1 should not exceed 31 */
> +#define VFE_FRAME_DROP_VAL 30
> +
> +#define vfe_line_array(ptr_line) \
> + ((const struct vfe_line (*)[]) &(ptr_line[-(ptr_line->id)]))
I get a checkpatch warning on this:
CHECK: Unnecessary parentheses around ptr_line[-(ptr_line->id)]
#3612: FILE: drivers/media/platform/qcom/camss/camss-vfe.h:35:
+ ((const struct vfe_line (*)[]) &(ptr_line[-(ptr_line->id)]))
This should be:
((const struct vfe_line (*)[]) &(ptr_line)[-(ptr_line)->id])
The checkpatch message is a bit odd, the real problem here is the missing
parenthesis around ptr_line: this would cause problems if ptr_line is an
expression like 'ptr + 5', which would lead to a bad expansion.
Regards,
Hans
> +
> +#define to_vfe(ptr_line) \
> + container_of(vfe_line_array(ptr_line), struct vfe_device, line)
> +
> enum vfe_output_state {
> VFE_OUTPUT_OFF,
> VFE_OUTPUT_RESERVED,
> @@ -40,23 +51,30 @@ enum vfe_line_id {
> VFE_LINE_RDI0 = 0,
> VFE_LINE_RDI1 = 1,
> VFE_LINE_RDI2 = 2,
> - VFE_LINE_PIX = 3
> + VFE_LINE_PIX = 3,
> + VFE_LINE_NUM_GEN1 = 4,
> + VFE_LINE_NUM_MAX = 4
> };
>
> struct vfe_output {
> u8 wm_num;
> u8 wm_idx[3];
>
> - int active_buf;
> struct camss_buffer *buf[2];
> struct camss_buffer *last_buffer;
> struct list_head pending_bufs;
>
> unsigned int drop_update_idx;
>
> + union {
> + struct {
> + int active_buf;
> + int wait_sof;
> + } gen1;
> + };
> enum vfe_output_state state;
> unsigned int sequence;
> - int wait_sof;
> +
> int wait_reg_update;
> struct completion sof;
> struct completion reg_update;
> @@ -78,59 +96,19 @@ struct vfe_line {
> struct vfe_device;
>
> struct vfe_hw_ops {
> - void (*hw_version_read)(struct vfe_device *vfe, struct device *dev);
> - u16 (*get_ub_size)(u8 vfe_id);
> + void (*enable_irq_common)(struct vfe_device *vfe);
> void (*global_reset)(struct vfe_device *vfe);
> - void (*halt_request)(struct vfe_device *vfe);
> - void (*halt_clear)(struct vfe_device *vfe);
> - void (*wm_enable)(struct vfe_device *vfe, u8 wm, u8 enable);
> - void (*wm_frame_based)(struct vfe_device *vfe, u8 wm, u8 enable);
> - void (*wm_line_based)(struct vfe_device *vfe, u32 wm,
> - struct v4l2_pix_format_mplane *pix,
> - u8 plane, u32 enable);
> - void (*wm_set_framedrop_period)(struct vfe_device *vfe, u8 wm, u8 per);
> - void (*wm_set_framedrop_pattern)(struct vfe_device *vfe, u8 wm,
> - u32 pattern);
> - void (*wm_set_ub_cfg)(struct vfe_device *vfe, u8 wm, u16 offset,
> - u16 depth);
> - void (*bus_reload_wm)(struct vfe_device *vfe, u8 wm);
> - void (*wm_set_ping_addr)(struct vfe_device *vfe, u8 wm, u32 addr);
> - void (*wm_set_pong_addr)(struct vfe_device *vfe, u8 wm, u32 addr);
> - int (*wm_get_ping_pong_status)(struct vfe_device *vfe, u8 wm);
> - void (*bus_enable_wr_if)(struct vfe_device *vfe, u8 enable);
> - void (*bus_connect_wm_to_rdi)(struct vfe_device *vfe, u8 wm,
> - enum vfe_line_id id);
> - void (*wm_set_subsample)(struct vfe_device *vfe, u8 wm);
> - void (*bus_disconnect_wm_from_rdi)(struct vfe_device *vfe, u8 wm,
> - enum vfe_line_id id);
> - void (*set_xbar_cfg)(struct vfe_device *vfe, struct vfe_output *output,
> - u8 enable);
> - void (*set_rdi_cid)(struct vfe_device *vfe, enum vfe_line_id id,
> - u8 cid);
> - void (*set_realign_cfg)(struct vfe_device *vfe, struct vfe_line *line,
> - u8 enable);
> + void (*hw_version_read)(struct vfe_device *vfe, struct device *dev);
> + irqreturn_t (*isr)(int irq, void *dev);
> + void (*isr_read)(struct vfe_device *vfe, u32 *value0, u32 *value1);
> void (*reg_update)(struct vfe_device *vfe, enum vfe_line_id line_id);
> void (*reg_update_clear)(struct vfe_device *vfe,
> enum vfe_line_id line_id);
> - void (*enable_irq_wm_line)(struct vfe_device *vfe, u8 wm,
> - enum vfe_line_id line_id, u8 enable);
> - void (*enable_irq_pix_line)(struct vfe_device *vfe, u8 comp,
> - enum vfe_line_id line_id, u8 enable);
> - void (*enable_irq_common)(struct vfe_device *vfe);
> - void (*set_demux_cfg)(struct vfe_device *vfe, struct vfe_line *line);
> - void (*set_scale_cfg)(struct vfe_device *vfe, struct vfe_line *line);
> - void (*set_crop_cfg)(struct vfe_device *vfe, struct vfe_line *line);
> - void (*set_clamp_cfg)(struct vfe_device *vfe);
> - void (*set_qos)(struct vfe_device *vfe);
> - void (*set_ds)(struct vfe_device *vfe);
> - void (*set_cgc_override)(struct vfe_device *vfe, u8 wm, u8 enable);
> - void (*set_camif_cfg)(struct vfe_device *vfe, struct vfe_line *line);
> - void (*set_camif_cmd)(struct vfe_device *vfe, u8 enable);
> - void (*set_module_cfg)(struct vfe_device *vfe, u8 enable);
> - int (*camif_wait_for_stop)(struct vfe_device *vfe, struct device *dev);
> - void (*isr_read)(struct vfe_device *vfe, u32 *value0, u32 *value1);
> + void (*subdev_init)(struct device *dev, struct vfe_device *vfe);
> + int (*vfe_disable)(struct vfe_line *line);
> + int (*vfe_enable)(struct vfe_line *line);
> + int (*vfe_halt)(struct vfe_device *vfe);
> void (*violation_read)(struct vfe_device *vfe);
> - irqreturn_t (*isr)(int irq, void *dev);
> };
>
> struct vfe_isr_ops {
> @@ -158,11 +136,14 @@ struct vfe_device {
> int stream_count;
> spinlock_t output_lock;
> enum vfe_line_id wm_output_map[MSM_VFE_IMAGE_MASTERS_NUM];
> - struct vfe_line line[MSM_VFE_LINE_NUM];
> + struct vfe_line line[VFE_LINE_NUM_MAX];
> + u8 line_num;
> u32 reg_update;
> u8 was_streaming;
> const struct vfe_hw_ops *ops;
> + const struct vfe_hw_ops_gen1 *ops_gen1;
> struct vfe_isr_ops isr_ops;
> + struct camss_video_ops video_ops;
> };
>
> struct resources;
> @@ -178,6 +159,37 @@ void msm_vfe_unregister_entities(struct vfe_device *vfe);
> void msm_vfe_get_vfe_id(struct media_entity *entity, u8 *id);
> void msm_vfe_get_vfe_line_id(struct media_entity *entity, enum vfe_line_id *id);
>
> +/*
> + * vfe_buf_add_pending - Add output buffer to list of pending
> + * @output: VFE output
> + * @buffer: Video buffer
> + */
> +void vfe_buf_add_pending(struct vfe_output *output, struct camss_buffer *buffer);
> +
> +struct camss_buffer *vfe_buf_get_pending(struct vfe_output *output);
> +
> +/*
> + * vfe_disable - Disable streaming on VFE line
> + * @line: VFE line
> + *
> + * Return 0 on success or a negative error code otherwise
> + */
> +int vfe_disable(struct vfe_line *line);
> +
> +int vfe_flush_buffers(struct camss_video *vid, enum vb2_buffer_state state);
> +
> +/*
> + * vfe_isr_comp_done - Process composite image done interrupt
> + * @vfe: VFE Device
> + * @comp: Composite image id
> + */
> +void vfe_isr_comp_done(struct vfe_device *vfe, u8 comp);
> +
> +void vfe_isr_reset_ack(struct vfe_device *vfe);
> +int vfe_put_output(struct vfe_line *line);
> +int vfe_release_wm(struct vfe_device *vfe, u8 wm);
> +int vfe_reserve_wm(struct vfe_device *vfe, enum vfe_line_id line_id);
> +
> extern const struct vfe_hw_ops vfe_ops_4_1;
> extern const struct vfe_hw_ops vfe_ops_4_7;
> extern const struct vfe_hw_ops vfe_ops_4_8;
> diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
> index 0c679c97da6d..49e25c837bdc 100644
> --- a/drivers/media/platform/qcom/camss/camss.c
> +++ b/drivers/media/platform/qcom/camss/camss.c
> @@ -881,7 +881,7 @@ static int camss_register_entities(struct camss *camss)
>
> for (i = 0; i < camss->ispif->line_num; i++)
> for (k = 0; k < camss->vfe_num; k++)
> - for (j = 0; j < ARRAY_SIZE(camss->vfe[k].line); j++) {
> + for (j = 0; j < camss->vfe[k].line_num; j++) {
> struct v4l2_subdev *ispif = &camss->ispif->line[i].subdev;
> struct v4l2_subdev *vfe = &camss->vfe[k].line[j].subdev;
>
> @@ -902,7 +902,7 @@ static int camss_register_entities(struct camss *camss)
> } else {
> for (i = 0; i < camss->csid_num; i++)
> for (k = 0; k < camss->vfe_num; k++)
> - for (j = 0; j < ARRAY_SIZE(camss->vfe[k].line); j++) {
> + for (j = 0; j < camss->vfe[k].line_num; j++) {
> struct v4l2_subdev *csid = &camss->csid[i].subdev;
> struct v4l2_subdev *vfe = &camss->vfe[k].line[j].subdev;
>
>
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