[PATCH v5 0/3]

[PATCH v5 0/3]

[Kaaira Gupta]

Changes since v4:
	- Add another patch which changes char argument to const char
	in function tpg_gen_text()
	- Return const char * from function tpg_g_color_order() in patch
	  2
	In 3rd patch:
	- Check font in probe() instead of s_stream()
	- Use dev_err instead of pr_err
	- Fix errors in commit message.
	- Base VIMC_CID_SHOW_INFO on VIVID_CID_OSD_TEXT_MODE

Changes since v3:
        In 1st patch:
        -Improved formatting of returned string.

        In 2nd patch:
         - Add CID prefix in control name and change it to a more
           generic name.
         - Rename bool variable to a generic name.
         - Disable text rendering instead of stopping stream if no
           font found.
         - Display more info like VIVID in VIMC.

Changes since v2:
        In 1st patch:
        - Create a 'define' to prevent repetition of the common color
          sequence string.
        - Use 'fallthrough' on case statement to prevent repetition of
          code.

Changes since v1:
        - Divided the patch into two patches.
        - Returned NULL for patterns whose color order cannot be
          defined. (Reported-by: kernel test robot <lkp@intel.com>)
        - Made separate switch cases for separate test patterns
         (Reported-by: kernel test robot <lkp@intel.com>)
        - Renamed variables from camelcase to use '_'
        - prefixed 'media' to the patches.

Kaaira Gupta (3):
  media: tpg: change char argument to const char
  media: tpg: Add function to return colors' order of test image
  media: vimc: Add a control to display info on test image

 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 39 ++++++++++---
 drivers/media/test-drivers/vimc/Kconfig       |  2 +
 drivers/media/test-drivers/vimc/vimc-common.h |  1 +
 drivers/media/test-drivers/vimc/vimc-core.c   | 10 ++++
 drivers/media/test-drivers/vimc/vimc-sensor.c | 57 +++++++++++++++++++
 include/media/tpg/v4l2-tpg.h                  |  3 +-
 6 files changed, 104 insertions(+), 8 deletions(-)

-- 
2.17.1

[PATCH v5 1/3] media: tpg: change char argument to const char

[Kaaira Gupta]

Change the argument of type char * to const char * for function
tpg_gen_text().

Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
---
 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 10 +++++-----
 include/media/tpg/v4l2-tpg.h                  |  2 +-
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
index 50f1e0b28b25..dde22a4cbd6c 100644
--- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
+++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
@@ -1927,34 +1927,34 @@ typedef struct { u16 __; u8 _; } __packed x24;
 
 static noinline void tpg_print_str_2(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
 			unsigned p, unsigned first, unsigned div, unsigned step,
-			int y, int x, char *text, unsigned len)
+			int y, int x, const char *text, unsigned len)
 {
 	PRINTSTR(u8);
 }
 
 static noinline void tpg_print_str_4(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
 			unsigned p, unsigned first, unsigned div, unsigned step,
-			int y, int x, char *text, unsigned len)
+			int y, int x, const char *text, unsigned len)
 {
 	PRINTSTR(u16);
 }
 
 static noinline void tpg_print_str_6(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
 			unsigned p, unsigned first, unsigned div, unsigned step,
-			int y, int x, char *text, unsigned len)
+			int y, int x, const char *text, unsigned len)
 {
 	PRINTSTR(x24);
 }
 
 static noinline void tpg_print_str_8(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
 			unsigned p, unsigned first, unsigned div, unsigned step,
-			int y, int x, char *text, unsigned len)
+			int y, int x, const char *text, unsigned len)
 {
 	PRINTSTR(u32);
 }
 
 void tpg_gen_text(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
-		  int y, int x, char *text)
+		  int y, int x, const char *text)
 {
 	unsigned step = V4L2_FIELD_HAS_T_OR_B(tpg->field) ? 2 : 1;
 	unsigned div = step;
diff --git a/include/media/tpg/v4l2-tpg.h b/include/media/tpg/v4l2-tpg.h
index eb191e85d363..9749ed409856 100644
--- a/include/media/tpg/v4l2-tpg.h
+++ b/include/media/tpg/v4l2-tpg.h
@@ -241,7 +241,7 @@ void tpg_log_status(struct tpg_data *tpg);
 
 void tpg_set_font(const u8 *f);
 void tpg_gen_text(const struct tpg_data *tpg,
-		u8 *basep[TPG_MAX_PLANES][2], int y, int x, char *text);
+		u8 *basep[TPG_MAX_PLANES][2], int y, int x, const char *text);
 void tpg_calc_text_basep(struct tpg_data *tpg,
 		u8 *basep[TPG_MAX_PLANES][2], unsigned p, u8 *vbuf);
 unsigned tpg_g_interleaved_plane(const struct tpg_data *tpg, unsigned buf_line);
-- 
2.17.1

[PATCH v5 2/3] media: tpg: Add function to return colors' order of test image

[Kaaira Gupta]

Currently there is no method to know the correct order of the colors for
a test image generated by tpg. Write a function that returns a string of
colors' order given a tpg. It returns a NULL pointer in case of test
patterns which do not have a well defined colors' order. Hence add a
NULL check for text in tpg_gen_text().

Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
---
 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 29 +++++++++++++++++--
 include/media/tpg/v4l2-tpg.h                  |  1 +
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
index dde22a4cbd6c..a052b656fa6a 100644
--- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
+++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
@@ -1959,12 +1959,14 @@ void tpg_gen_text(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
 	unsigned step = V4L2_FIELD_HAS_T_OR_B(tpg->field) ? 2 : 1;
 	unsigned div = step;
 	unsigned first = 0;
-	unsigned len = strlen(text);
+	unsigned len;
 	unsigned p;
 
-	if (font8x16 == NULL || basep == NULL)
+	if (font8x16 == NULL || basep == NULL || text == NULL)
 		return;
 
+	len = strlen(text);
+
 	/* Checks if it is possible to show string */
 	if (y + 16 >= tpg->compose.height || x + 8 >= tpg->compose.width)
 		return;
@@ -2006,6 +2008,29 @@ void tpg_gen_text(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
 }
 EXPORT_SYMBOL_GPL(tpg_gen_text);
 
+const char *tpg_g_color_order(const struct tpg_data *tpg)
+{
+	switch (tpg->pattern) {
+	case TPG_PAT_75_COLORBAR:
+	case TPG_PAT_100_COLORBAR:
+	case TPG_PAT_CSC_COLORBAR:
+	case TPG_PAT_100_HCOLORBAR:
+		return "white, yellow, cyan, green, magenta, red, blue, black";
+	case TPG_PAT_BLACK:
+		return "Black";
+	case TPG_PAT_WHITE:
+		return "White";
+	case TPG_PAT_RED:
+		return "Red";
+	case TPG_PAT_GREEN:
+		return "Green";
+	case TPG_PAT_BLUE:
+		return "Blue";
+	default:
+		return NULL;
+	}
+}
+
 void tpg_update_mv_step(struct tpg_data *tpg)
 {
 	int factor = tpg->mv_hor_mode > TPG_MOVE_NONE ? -1 : 1;
diff --git a/include/media/tpg/v4l2-tpg.h b/include/media/tpg/v4l2-tpg.h
index 9749ed409856..0b0ddb87380e 100644
--- a/include/media/tpg/v4l2-tpg.h
+++ b/include/media/tpg/v4l2-tpg.h
@@ -252,6 +252,7 @@ void tpg_fillbuffer(struct tpg_data *tpg, v4l2_std_id std,
 bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc);
 void tpg_s_crop_compose(struct tpg_data *tpg, const struct v4l2_rect *crop,
 		const struct v4l2_rect *compose);
+const char *tpg_g_color_order(const struct tpg_data *tpg);
 
 static inline void tpg_s_pattern(struct tpg_data *tpg, enum tpg_pattern pattern)
 {
-- 
2.17.1

Re: [PATCH v5 2/3] media: tpg: Add function to return colors' order of test image

[Hans Verkuil]

On 24/06/2020 15:43, Kaaira Gupta wrote:
> Currently there is no method to know the correct order of the colors for
> a test image generated by tpg. Write a function that returns a string of
> colors' order given a tpg. It returns a NULL pointer in case of test
> patterns which do not have a well defined colors' order. Hence add a
> NULL check for text in tpg_gen_text().
> 
> Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
> ---
>  drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 29 +++++++++++++++++--
>  include/media/tpg/v4l2-tpg.h                  |  1 +
>  2 files changed, 28 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> index dde22a4cbd6c..a052b656fa6a 100644
> --- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> +++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> @@ -1959,12 +1959,14 @@ void tpg_gen_text(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
>  	unsigned step = V4L2_FIELD_HAS_T_OR_B(tpg->field) ? 2 : 1;
>  	unsigned div = step;
>  	unsigned first = 0;
> -	unsigned len = strlen(text);
> +	unsigned len;
>  	unsigned p;
>  
> -	if (font8x16 == NULL || basep == NULL)
> +	if (font8x16 == NULL || basep == NULL || text == NULL)
>  		return;
>  
> +	len = strlen(text);
> +
>  	/* Checks if it is possible to show string */
>  	if (y + 16 >= tpg->compose.height || x + 8 >= tpg->compose.width)
>  		return;
> @@ -2006,6 +2008,29 @@ void tpg_gen_text(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
>  }
>  EXPORT_SYMBOL_GPL(tpg_gen_text);
>  
> +const char *tpg_g_color_order(const struct tpg_data *tpg)
> +{
> +	switch (tpg->pattern) {
> +	case TPG_PAT_75_COLORBAR:
> +	case TPG_PAT_100_COLORBAR:
> +	case TPG_PAT_CSC_COLORBAR:
> +	case TPG_PAT_100_HCOLORBAR:
> +		return "white, yellow, cyan, green, magenta, red, blue, black";
> +	case TPG_PAT_BLACK:
> +		return "Black";
> +	case TPG_PAT_WHITE:
> +		return "White";
> +	case TPG_PAT_RED:
> +		return "Red";
> +	case TPG_PAT_GREEN:
> +		return "Green";
> +	case TPG_PAT_BLUE:
> +		return "Blue";
> +	default:
> +		return NULL;
> +	}
> +}

Missing EXPORT_SYMBOL_GPL().

Regards,

	Hans

> +
>  void tpg_update_mv_step(struct tpg_data *tpg)
>  {
>  	int factor = tpg->mv_hor_mode > TPG_MOVE_NONE ? -1 : 1;
> diff --git a/include/media/tpg/v4l2-tpg.h b/include/media/tpg/v4l2-tpg.h
> index 9749ed409856..0b0ddb87380e 100644
> --- a/include/media/tpg/v4l2-tpg.h
> +++ b/include/media/tpg/v4l2-tpg.h
> @@ -252,6 +252,7 @@ void tpg_fillbuffer(struct tpg_data *tpg, v4l2_std_id std,
>  bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc);
>  void tpg_s_crop_compose(struct tpg_data *tpg, const struct v4l2_rect *crop,
>  		const struct v4l2_rect *compose);
> +const char *tpg_g_color_order(const struct tpg_data *tpg);
>  
>  static inline void tpg_s_pattern(struct tpg_data *tpg, enum tpg_pattern pattern)
>  {
> 

[PATCH v5 3/3] media: vimc: Add a control to display info on test image

[Kaaira Gupta]

Add a control in VIMC to display information such as the correct order of
colors for a given test pattern, brightness, hue, saturation, contrast,
width and height at sensor over test image.

Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
---
 drivers/media/test-drivers/vimc/Kconfig       |  2 +
 drivers/media/test-drivers/vimc/vimc-common.h |  1 +
 drivers/media/test-drivers/vimc/vimc-core.c   | 10 ++++
 drivers/media/test-drivers/vimc/vimc-sensor.c | 57 +++++++++++++++++++
 4 files changed, 70 insertions(+)

diff --git a/drivers/media/test-drivers/vimc/Kconfig b/drivers/media/test-drivers/vimc/Kconfig
index 4068a67585f9..da4b2ad6e40c 100644
--- a/drivers/media/test-drivers/vimc/Kconfig
+++ b/drivers/media/test-drivers/vimc/Kconfig
@@ -2,6 +2,8 @@
 config VIDEO_VIMC
 	tristate "Virtual Media Controller Driver (VIMC)"
 	depends on VIDEO_DEV && VIDEO_V4L2
+	select FONT_SUPPORT
+	select FONT_8x16
 	select MEDIA_CONTROLLER
 	select VIDEO_V4L2_SUBDEV_API
 	select VIDEOBUF2_VMALLOC
diff --git a/drivers/media/test-drivers/vimc/vimc-common.h b/drivers/media/test-drivers/vimc/vimc-common.h
index ae163dec2459..afda52253402 100644
--- a/drivers/media/test-drivers/vimc/vimc-common.h
+++ b/drivers/media/test-drivers/vimc/vimc-common.h
@@ -20,6 +20,7 @@
 #define VIMC_CID_VIMC_CLASS		(0x00f00000 | 1)
 #define VIMC_CID_TEST_PATTERN		(VIMC_CID_VIMC_BASE + 0)
 #define VIMC_CID_MEAN_WIN_SIZE		(VIMC_CID_VIMC_BASE + 1)
+#define VIMC_CID_SHOW_INFO		(VIMC_CID_VIMC_BASE + 2)
 
 #define VIMC_FRAME_MAX_WIDTH 4096
 #define VIMC_FRAME_MAX_HEIGHT 2160
diff --git a/drivers/media/test-drivers/vimc/vimc-core.c b/drivers/media/test-drivers/vimc/vimc-core.c
index 11210aaa2551..461320ae965c 100644
--- a/drivers/media/test-drivers/vimc/vimc-core.c
+++ b/drivers/media/test-drivers/vimc/vimc-core.c
@@ -5,10 +5,12 @@
  * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
  */
 
+#include <linux/font.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <media/media-device.h>
+#include <media/tpg/v4l2-tpg.h>
 #include <media/v4l2-device.h>
 
 #include "vimc-common.h"
@@ -263,6 +265,7 @@ static int vimc_register_devices(struct vimc_device *vimc)
 
 static int vimc_probe(struct platform_device *pdev)
 {
+	const struct font_desc *font = find_font("VGA8x16");
 	struct vimc_device *vimc;
 	int ret;
 
@@ -272,6 +275,13 @@ static int vimc_probe(struct platform_device *pdev)
 	if (!vimc)
 		return -ENOMEM;
 
+	if (!font) {
+		dev_err(&pdev->dev, "vimc: could not find font\n");
+		return -ENODEV;
+	}
+
+	tpg_set_font(font->data);
+
 	vimc->pipe_cfg = &pipe_cfg;
 
 	/* Link the media device within the v4l2_device */
diff --git a/drivers/media/test-drivers/vimc/vimc-sensor.c b/drivers/media/test-drivers/vimc/vimc-sensor.c
index a2f09ac9a360..d776fdcdc3bf 100644
--- a/drivers/media/test-drivers/vimc/vimc-sensor.c
+++ b/drivers/media/test-drivers/vimc/vimc-sensor.c
@@ -19,6 +19,8 @@ struct vimc_sen_device {
 	struct v4l2_subdev sd;
 	struct tpg_data tpg;
 	u8 *frame;
+	unsigned show_info;
+	unsigned ns;
 	/* The active format */
 	struct v4l2_mbus_framefmt mbus_format;
 	struct v4l2_ctrl_handler hdl;
@@ -185,10 +187,43 @@ static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = {
 static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
 				    const void *sink_frame)
 {
+	u8 *basep[TPG_MAX_PLANES][2];
+	char str[100];
+	int line = 1;
 	struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
 						    ved);
 
 	tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame);
+	tpg_calc_text_basep(&vsen->tpg, basep, 0, vsen->frame);
+
+	if (vsen->show_info <= 1) {
+		unsigned ms;
+
+		ms = (ktime_get_ns() - vsen->ns) / 1000000;
+		snprintf(str, sizeof(str), "%02d:%02d:%02d:%03d",
+			 (ms / (60 * 60 * 1000)) % 24,
+			 (ms / (60 * 1000)) % 60,
+			 (ms / 1000) % 60,
+			 ms % 1000);
+		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, str);
+	}
+
+	if (vsen->show_info == 0) {
+		const char *order = tpg_g_color_order(&vsen->tpg);
+
+		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, order);
+		snprintf(str, sizeof(str),
+			 "brightness %3d, contrast %3d, saturation %3d, hue %d ",
+			 vsen->tpg.brightness,
+			 vsen->tpg.contrast,
+			 vsen->tpg.saturation,
+			 vsen->tpg.hue);
+		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, str);
+		snprintf(str, sizeof(str), "sensor size: %dx%d",
+			 vsen->mbus_format.width, vsen->mbus_format.height);
+		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, str);
+	}
+
 	return vsen->frame;
 }
 
@@ -201,6 +236,8 @@ static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
 		const struct vimc_pix_map *vpix;
 		unsigned int frame_size;
 
+		vsen->ns = ktime_get_ns();
+
 		/* Calculate the frame size */
 		vpix = vimc_pix_map_by_code(vsen->mbus_format.code);
 		frame_size = vsen->mbus_format.width * vpix->bpp *
@@ -269,6 +306,9 @@ static int vimc_sen_s_ctrl(struct v4l2_ctrl *ctrl)
 	case V4L2_CID_SATURATION:
 		tpg_s_saturation(&vsen->tpg, ctrl->val);
 		break;
+	case VIMC_CID_SHOW_INFO:
+		vsen->show_info = ctrl->val;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -307,6 +347,22 @@ static const struct v4l2_ctrl_config vimc_sen_ctrl_test_pattern = {
 	.qmenu = tpg_pattern_strings,
 };
 
+static const char * const vimc_ctrl_show_info_strings[] = {
+	"All",
+	"Counters Only",
+	"None",
+	NULL,
+};
+
+static const struct v4l2_ctrl_config vimc_sen_ctrl_show_info = {
+	.ops = &vimc_sen_ctrl_ops,
+	.id = VIMC_CID_SHOW_INFO,
+	.name = "Show Information",
+	.type = V4L2_CTRL_TYPE_MENU,
+	.max = ARRAY_SIZE(vimc_ctrl_show_info_strings) - 2,
+	.qmenu = vimc_ctrl_show_info_strings,
+};
+
 static struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
 					    const char *vcfg_name)
 {
@@ -323,6 +379,7 @@ static struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
 
 	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_class, NULL);
 	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_test_pattern, NULL);
+	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_show_info, NULL);
 	v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 			  V4L2_CID_VFLIP, 0, 1, 1, 0);
 	v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
-- 
2.17.1

Re: [PATCH v5 3/3] media: vimc: Add a control to display info on test image

[Hans Verkuil]

On 24/06/2020 15:43, Kaaira Gupta wrote:
> Add a control in VIMC to display information such as the correct order of
> colors for a given test pattern, brightness, hue, saturation, contrast,
> width and height at sensor over test image.
> 
> Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
> ---
>  drivers/media/test-drivers/vimc/Kconfig       |  2 +
>  drivers/media/test-drivers/vimc/vimc-common.h |  1 +
>  drivers/media/test-drivers/vimc/vimc-core.c   | 10 ++++
>  drivers/media/test-drivers/vimc/vimc-sensor.c | 57 +++++++++++++++++++
>  4 files changed, 70 insertions(+)
> 
> diff --git a/drivers/media/test-drivers/vimc/Kconfig b/drivers/media/test-drivers/vimc/Kconfig
> index 4068a67585f9..da4b2ad6e40c 100644
> --- a/drivers/media/test-drivers/vimc/Kconfig
> +++ b/drivers/media/test-drivers/vimc/Kconfig
> @@ -2,6 +2,8 @@
>  config VIDEO_VIMC
>  	tristate "Virtual Media Controller Driver (VIMC)"
>  	depends on VIDEO_DEV && VIDEO_V4L2
> +	select FONT_SUPPORT
> +	select FONT_8x16
>  	select MEDIA_CONTROLLER
>  	select VIDEO_V4L2_SUBDEV_API
>  	select VIDEOBUF2_VMALLOC
> diff --git a/drivers/media/test-drivers/vimc/vimc-common.h b/drivers/media/test-drivers/vimc/vimc-common.h
> index ae163dec2459..afda52253402 100644
> --- a/drivers/media/test-drivers/vimc/vimc-common.h
> +++ b/drivers/media/test-drivers/vimc/vimc-common.h
> @@ -20,6 +20,7 @@
>  #define VIMC_CID_VIMC_CLASS		(0x00f00000 | 1)
>  #define VIMC_CID_TEST_PATTERN		(VIMC_CID_VIMC_BASE + 0)
>  #define VIMC_CID_MEAN_WIN_SIZE		(VIMC_CID_VIMC_BASE + 1)
> +#define VIMC_CID_SHOW_INFO		(VIMC_CID_VIMC_BASE + 2)
>  
>  #define VIMC_FRAME_MAX_WIDTH 4096
>  #define VIMC_FRAME_MAX_HEIGHT 2160
> diff --git a/drivers/media/test-drivers/vimc/vimc-core.c b/drivers/media/test-drivers/vimc/vimc-core.c
> index 11210aaa2551..461320ae965c 100644
> --- a/drivers/media/test-drivers/vimc/vimc-core.c
> +++ b/drivers/media/test-drivers/vimc/vimc-core.c
> @@ -5,10 +5,12 @@
>   * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
>   */
>  
> +#include <linux/font.h>
>  #include <linux/init.h>
>  #include <linux/module.h>
>  #include <linux/platform_device.h>
>  #include <media/media-device.h>
> +#include <media/tpg/v4l2-tpg.h>
>  #include <media/v4l2-device.h>
>  
>  #include "vimc-common.h"
> @@ -263,6 +265,7 @@ static int vimc_register_devices(struct vimc_device *vimc)
>  
>  static int vimc_probe(struct platform_device *pdev)
>  {
> +	const struct font_desc *font = find_font("VGA8x16");
>  	struct vimc_device *vimc;
>  	int ret;
>  
> @@ -272,6 +275,13 @@ static int vimc_probe(struct platform_device *pdev)
>  	if (!vimc)
>  		return -ENOMEM;
>  
> +	if (!font) {
> +		dev_err(&pdev->dev, "vimc: could not find font\n");
> +		return -ENODEV;
> +	}
> +
> +	tpg_set_font(font->data);
> +
>  	vimc->pipe_cfg = &pipe_cfg;
>  
>  	/* Link the media device within the v4l2_device */
> diff --git a/drivers/media/test-drivers/vimc/vimc-sensor.c b/drivers/media/test-drivers/vimc/vimc-sensor.c
> index a2f09ac9a360..d776fdcdc3bf 100644
> --- a/drivers/media/test-drivers/vimc/vimc-sensor.c
> +++ b/drivers/media/test-drivers/vimc/vimc-sensor.c
> @@ -19,6 +19,8 @@ struct vimc_sen_device {
>  	struct v4l2_subdev sd;
>  	struct tpg_data tpg;
>  	u8 *frame;
> +	unsigned show_info;
> +	unsigned ns;

That name is a bit vague. How about 'start_stream_ts' (ts == timestamp)?

Note also that ktime_get_ns() returns a u64, not an unsigned.

Regards,

	Hans

>  	/* The active format */
>  	struct v4l2_mbus_framefmt mbus_format;
>  	struct v4l2_ctrl_handler hdl;
> @@ -185,10 +187,43 @@ static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = {
>  static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
>  				    const void *sink_frame)
>  {
> +	u8 *basep[TPG_MAX_PLANES][2];
> +	char str[100];
> +	int line = 1;
>  	struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
>  						    ved);
>  
>  	tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame);
> +	tpg_calc_text_basep(&vsen->tpg, basep, 0, vsen->frame);
> +
> +	if (vsen->show_info <= 1) {
> +		unsigned ms;
> +
> +		ms = (ktime_get_ns() - vsen->ns) / 1000000;
> +		snprintf(str, sizeof(str), "%02d:%02d:%02d:%03d",
> +			 (ms / (60 * 60 * 1000)) % 24,
> +			 (ms / (60 * 1000)) % 60,
> +			 (ms / 1000) % 60,
> +			 ms % 1000);
> +		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, str);
> +	}
> +
> +	if (vsen->show_info == 0) {
> +		const char *order = tpg_g_color_order(&vsen->tpg);
> +
> +		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, order);
> +		snprintf(str, sizeof(str),
> +			 "brightness %3d, contrast %3d, saturation %3d, hue %d ",
> +			 vsen->tpg.brightness,
> +			 vsen->tpg.contrast,
> +			 vsen->tpg.saturation,
> +			 vsen->tpg.hue);
> +		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, str);
> +		snprintf(str, sizeof(str), "sensor size: %dx%d",
> +			 vsen->mbus_format.width, vsen->mbus_format.height);
> +		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, str);
> +	}
> +
>  	return vsen->frame;
>  }
>  
> @@ -201,6 +236,8 @@ static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
>  		const struct vimc_pix_map *vpix;
>  		unsigned int frame_size;
>  
> +		vsen->ns = ktime_get_ns();
> +
>  		/* Calculate the frame size */
>  		vpix = vimc_pix_map_by_code(vsen->mbus_format.code);
>  		frame_size = vsen->mbus_format.width * vpix->bpp *
> @@ -269,6 +306,9 @@ static int vimc_sen_s_ctrl(struct v4l2_ctrl *ctrl)
>  	case V4L2_CID_SATURATION:
>  		tpg_s_saturation(&vsen->tpg, ctrl->val);
>  		break;
> +	case VIMC_CID_SHOW_INFO:
> +		vsen->show_info = ctrl->val;
> +		break;
>  	default:
>  		return -EINVAL;
>  	}
> @@ -307,6 +347,22 @@ static const struct v4l2_ctrl_config vimc_sen_ctrl_test_pattern = {
>  	.qmenu = tpg_pattern_strings,
>  };
>  
> +static const char * const vimc_ctrl_show_info_strings[] = {
> +	"All",
> +	"Counters Only",
> +	"None",
> +	NULL,
> +};
> +
> +static const struct v4l2_ctrl_config vimc_sen_ctrl_show_info = {
> +	.ops = &vimc_sen_ctrl_ops,
> +	.id = VIMC_CID_SHOW_INFO,
> +	.name = "Show Information",
> +	.type = V4L2_CTRL_TYPE_MENU,
> +	.max = ARRAY_SIZE(vimc_ctrl_show_info_strings) - 2,
> +	.qmenu = vimc_ctrl_show_info_strings,
> +};
> +
>  static struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
>  					    const char *vcfg_name)
>  {
> @@ -323,6 +379,7 @@ static struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
>  
>  	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_class, NULL);
>  	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_test_pattern, NULL);
> +	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_show_info, NULL);
>  	v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
>  			  V4L2_CID_VFLIP, 0, 1, 1, 0);
>  	v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
> 

Re: [PATCH v5 3/3] media: vimc: Add a control to display info on test image

[Kieran Bingham]

Hi Kaaira,

On 24/06/2020 14:51, Hans Verkuil wrote:
> On 24/06/2020 15:43, Kaaira Gupta wrote:
>> Add a control in VIMC to display information such as the correct order of
>> colors for a given test pattern, brightness, hue, saturation, contrast,
>> width and height at sensor over test image.
>>
>> Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
>> ---
>>  drivers/media/test-drivers/vimc/Kconfig       |  2 +
>>  drivers/media/test-drivers/vimc/vimc-common.h |  1 +
>>  drivers/media/test-drivers/vimc/vimc-core.c   | 10 ++++
>>  drivers/media/test-drivers/vimc/vimc-sensor.c | 57 +++++++++++++++++++
>>  4 files changed, 70 insertions(+)
>>
>> diff --git a/drivers/media/test-drivers/vimc/Kconfig b/drivers/media/test-drivers/vimc/Kconfig
>> index 4068a67585f9..da4b2ad6e40c 100644
>> --- a/drivers/media/test-drivers/vimc/Kconfig
>> +++ b/drivers/media/test-drivers/vimc/Kconfig
>> @@ -2,6 +2,8 @@
>>  config VIDEO_VIMC
>>  	tristate "Virtual Media Controller Driver (VIMC)"
>>  	depends on VIDEO_DEV && VIDEO_V4L2
>> +	select FONT_SUPPORT
>> +	select FONT_8x16
>>  	select MEDIA_CONTROLLER
>>  	select VIDEO_V4L2_SUBDEV_API
>>  	select VIDEOBUF2_VMALLOC
>> diff --git a/drivers/media/test-drivers/vimc/vimc-common.h b/drivers/media/test-drivers/vimc/vimc-common.h
>> index ae163dec2459..afda52253402 100644
>> --- a/drivers/media/test-drivers/vimc/vimc-common.h
>> +++ b/drivers/media/test-drivers/vimc/vimc-common.h
>> @@ -20,6 +20,7 @@
>>  #define VIMC_CID_VIMC_CLASS		(0x00f00000 | 1)
>>  #define VIMC_CID_TEST_PATTERN		(VIMC_CID_VIMC_BASE + 0)
>>  #define VIMC_CID_MEAN_WIN_SIZE		(VIMC_CID_VIMC_BASE + 1)
>> +#define VIMC_CID_SHOW_INFO		(VIMC_CID_VIMC_BASE + 2)
>>  
>>  #define VIMC_FRAME_MAX_WIDTH 4096
>>  #define VIMC_FRAME_MAX_HEIGHT 2160
>> diff --git a/drivers/media/test-drivers/vimc/vimc-core.c b/drivers/media/test-drivers/vimc/vimc-core.c
>> index 11210aaa2551..461320ae965c 100644
>> --- a/drivers/media/test-drivers/vimc/vimc-core.c
>> +++ b/drivers/media/test-drivers/vimc/vimc-core.c
>> @@ -5,10 +5,12 @@
>>   * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
>>   */
>>  
>> +#include <linux/font.h>
>>  #include <linux/init.h>
>>  #include <linux/module.h>
>>  #include <linux/platform_device.h>
>>  #include <media/media-device.h>
>> +#include <media/tpg/v4l2-tpg.h>
>>  #include <media/v4l2-device.h>
>>  
>>  #include "vimc-common.h"
>> @@ -263,6 +265,7 @@ static int vimc_register_devices(struct vimc_device *vimc)
>>  
>>  static int vimc_probe(struct platform_device *pdev)
>>  {
>> +	const struct font_desc *font = find_font("VGA8x16");
>>  	struct vimc_device *vimc;
>>  	int ret;
>>  
>> @@ -272,6 +275,13 @@ static int vimc_probe(struct platform_device *pdev)
>>  	if (!vimc)
>>  		return -ENOMEM;
>>  
>> +	if (!font) {
>> +		dev_err(&pdev->dev, "vimc: could not find font\n");
>> +		return -ENODEV;
>> +	}
>> +
>> +	tpg_set_font(font->data);
>> +
>>  	vimc->pipe_cfg = &pipe_cfg;
>>  
>>  	/* Link the media device within the v4l2_device */
>> diff --git a/drivers/media/test-drivers/vimc/vimc-sensor.c b/drivers/media/test-drivers/vimc/vimc-sensor.c
>> index a2f09ac9a360..d776fdcdc3bf 100644
>> --- a/drivers/media/test-drivers/vimc/vimc-sensor.c
>> +++ b/drivers/media/test-drivers/vimc/vimc-sensor.c
>> @@ -19,6 +19,8 @@ struct vimc_sen_device {
>>  	struct v4l2_subdev sd;
>>  	struct tpg_data tpg;
>>  	u8 *frame;
>> +	unsigned show_info;

It's better to declare a 'type' rather than just unsigned.
 i.e.
	unsigned int
	unsigned long




>> +	unsigned ns;
> 
> That name is a bit vague. How about 'start_stream_ts' (ts == timestamp)?
> 
> Note also that ktime_get_ns() returns a u64, not an unsigned.
> 
> Regards,
> 
> 	Hans
> 
>>  	/* The active format */
>>  	struct v4l2_mbus_framefmt mbus_format;
>>  	struct v4l2_ctrl_handler hdl;
>> @@ -185,10 +187,43 @@ static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = {
>>  static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
>>  				    const void *sink_frame)
>>  {
>> +	u8 *basep[TPG_MAX_PLANES][2];
>> +	char str[100];
>> +	int line = 1;
>>  	struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
>>  						    ved);
>>  
>>  	tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame);
>> +	tpg_calc_text_basep(&vsen->tpg, basep, 0, vsen->frame);
>> +
>> +	if (vsen->show_info <= 1) {

I would suggest creating an enum of the possible values so that you can
do a switch statement here, otherwise a reader of the code will be
thinking "What is 1 refering to?"


At least then you could do:

switch(vsen->show_info) {
	VSEN_SHOW_ALL:
		... do all stuff ..
		/* fallthrough */
	VSEN_SHOW_COUNTERS:
		... do just the counters ...
		/* fallthrough */ (or break;)
	VSEN_SHOW_NONE:
	default:
		break;
}


Looking at vivid, I can see that the use of the numbers came from there,
but it would be nice to try to improve readability some how...


>> +		unsigned ms;
>> +
>> +		ms = (ktime_get_ns() - vsen->ns) / 1000000;
>> +		snprintf(str, sizeof(str), "%02d:%02d:%02d:%03d",
>> +			 (ms / (60 * 60 * 1000)) % 24,
>> +			 (ms / (60 * 1000)) % 60,
>> +			 (ms / 1000) % 60,
>> +			 ms % 1000);
>> +		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, str);

you've used "line++ * 16" where vivid seems to always use line++ *
line_height.

Perhaps vivid can customise the value there with a control, but even if
not, it would be better to put a
 const unsigned int line_height = 16;

at the top of the function so it's clear what that parameter does.

>> +	}
>> +
>> +	if (vsen->show_info == 0) {
>> +		const char *order = tpg_g_color_order(&vsen->tpg);
>> +
>> +		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, order);
>> +		snprintf(str, sizeof(str),
>> +			 "brightness %3d, contrast %3d, saturation %3d, hue %d ",
>> +			 vsen->tpg.brightness,
>> +			 vsen->tpg.contrast,
>> +			 vsen->tpg.saturation,
>> +			 vsen->tpg.hue);
>> +		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, str);
>> +		snprintf(str, sizeof(str), "sensor size: %dx%d",
>> +			 vsen->mbus_format.width, vsen->mbus_format.height);
>> +		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, str);
>> +	}
>> +
>>  	return vsen->frame;
>>  }
>>  
>> @@ -201,6 +236,8 @@ static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
>>  		const struct vimc_pix_map *vpix;
>>  		unsigned int frame_size;
>>  
>> +		vsen->ns = ktime_get_ns();
>> +
>>  		/* Calculate the frame size */
>>  		vpix = vimc_pix_map_by_code(vsen->mbus_format.code);
>>  		frame_size = vsen->mbus_format.width * vpix->bpp *
>> @@ -269,6 +306,9 @@ static int vimc_sen_s_ctrl(struct v4l2_ctrl *ctrl)
>>  	case V4L2_CID_SATURATION:
>>  		tpg_s_saturation(&vsen->tpg, ctrl->val);
>>  		break;
>> +	case VIMC_CID_SHOW_INFO:
>> +		vsen->show_info = ctrl->val;
>> +		break;
>>  	default:
>>  		return -EINVAL;
>>  	}
>> @@ -307,6 +347,22 @@ static const struct v4l2_ctrl_config vimc_sen_ctrl_test_pattern = {
>>  	.qmenu = tpg_pattern_strings,
>>  };
>>  
>> +static const char * const vimc_ctrl_show_info_strings[] = {
>> +	"All",
>> +	"Counters Only",
>> +	"None",
>> +	NULL,
>> +};
>> +
>> +static const struct v4l2_ctrl_config vimc_sen_ctrl_show_info = {
>> +	.ops = &vimc_sen_ctrl_ops,
>> +	.id = VIMC_CID_SHOW_INFO,
>> +	.name = "Show Information",
>> +	.type = V4L2_CTRL_TYPE_MENU,
>> +	.max = ARRAY_SIZE(vimc_ctrl_show_info_strings) - 2,
>> +	.qmenu = vimc_ctrl_show_info_strings,
>> +};
>> +
>>  static struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
>>  					    const char *vcfg_name)
>>  {
>> @@ -323,6 +379,7 @@ static struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
>>  
>>  	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_class, NULL);
>>  	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_test_pattern, NULL);
>> +	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_show_info, NULL);
>>  	v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
>>  			  V4L2_CID_VFLIP, 0, 1, 1, 0);
>>  	v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
>>
> 

-- 
Regards
--
Kieran

Re: [PATCH v5 3/3] media: vimc: Add a control to display info on test image

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 1355 bytes --]

Hi Kaaira,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linuxtv-media/master]
[also build test ERROR on v5.8-rc2 next-20200624]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Kaaira-Gupta/media-tpg-change-char-argument-to-const-char/20200624-224513
base:   git://linuxtv.org/media_tree.git master
config: nds32-randconfig-c022-20200624 (attached as .config)
compiler: nds32le-linux-gcc (GCC) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   arch/nds32/kernel/ex-exit.o: in function `resume_kernel':
   (.text+0x14a): relocation truncated to fit: R_NDS32_25_PCREL_RELA against symbol `preempt_schedule_irq' defined in .sched.text section in kernel/sched/core.o
   nds32le-linux-ld: drivers/media/test-drivers/vimc/vimc-sensor.o: in function `vimc_sen_process_frame':
   vimc-sensor.c:(.text+0xec): undefined reference to `__udivdi3'
>> nds32le-linux-ld: vimc-sensor.c:(.text+0xf0): undefined reference to `__udivdi3'

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 30481 bytes --]

Re: [PATCH v5 3/3] media: vimc: Add a control to display info on test image

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 1140 bytes --]

Hi Kaaira,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linuxtv-media/master]
[also build test ERROR on v5.8-rc2 next-20200624]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Kaaira-Gupta/media-tpg-change-char-argument-to-const-char/20200624-224513
base:   git://linuxtv.org/media_tree.git master
config: i386-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0
reproduce (this is a W=1 build):
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   ld: drivers/media/test-drivers/vimc/vimc-sensor.o: in function `vimc_sen_process_frame':
>> vimc-sensor.c:(.text+0x141): undefined reference to `__udivdi3'

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 74067 bytes --]

Re: [PATCH v5 3/3] media: vimc: Add a control to display info on test image

[Helen Koike]

Hi Kaaira,

Thanks for your patch, I tested and it works great, just some other comments below.

On 6/24/20 10:43 AM, Kaaira Gupta wrote:
> Add a control in VIMC to display information such as the correct order of
> colors for a given test pattern, brightness, hue, saturation, contrast,
> width and height at sensor over test image.
> 
> Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
> ---
>  drivers/media/test-drivers/vimc/Kconfig       |  2 +
>  drivers/media/test-drivers/vimc/vimc-common.h |  1 +
>  drivers/media/test-drivers/vimc/vimc-core.c   | 10 ++++
>  drivers/media/test-drivers/vimc/vimc-sensor.c | 57 +++++++++++++++++++
>  4 files changed, 70 insertions(+)
> 
> diff --git a/drivers/media/test-drivers/vimc/Kconfig b/drivers/media/test-drivers/vimc/Kconfig
> index 4068a67585f9..da4b2ad6e40c 100644
> --- a/drivers/media/test-drivers/vimc/Kconfig
> +++ b/drivers/media/test-drivers/vimc/Kconfig
> @@ -2,6 +2,8 @@
>  config VIDEO_VIMC
>  	tristate "Virtual Media Controller Driver (VIMC)"
>  	depends on VIDEO_DEV && VIDEO_V4L2
> +	select FONT_SUPPORT
> +	select FONT_8x16
>  	select MEDIA_CONTROLLER
>  	select VIDEO_V4L2_SUBDEV_API
>  	select VIDEOBUF2_VMALLOC
> diff --git a/drivers/media/test-drivers/vimc/vimc-common.h b/drivers/media/test-drivers/vimc/vimc-common.h
> index ae163dec2459..afda52253402 100644
> --- a/drivers/media/test-drivers/vimc/vimc-common.h
> +++ b/drivers/media/test-drivers/vimc/vimc-common.h
> @@ -20,6 +20,7 @@
>  #define VIMC_CID_VIMC_CLASS		(0x00f00000 | 1)
>  #define VIMC_CID_TEST_PATTERN		(VIMC_CID_VIMC_BASE + 0)
>  #define VIMC_CID_MEAN_WIN_SIZE		(VIMC_CID_VIMC_BASE + 1)
> +#define VIMC_CID_SHOW_INFO		(VIMC_CID_VIMC_BASE + 2)
>  
>  #define VIMC_FRAME_MAX_WIDTH 4096
>  #define VIMC_FRAME_MAX_HEIGHT 2160
> diff --git a/drivers/media/test-drivers/vimc/vimc-core.c b/drivers/media/test-drivers/vimc/vimc-core.c
> index 11210aaa2551..461320ae965c 100644
> --- a/drivers/media/test-drivers/vimc/vimc-core.c
> +++ b/drivers/media/test-drivers/vimc/vimc-core.c
> @@ -5,10 +5,12 @@
>   * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
>   */
>  
> +#include <linux/font.h>
>  #include <linux/init.h>
>  #include <linux/module.h>
>  #include <linux/platform_device.h>
>  #include <media/media-device.h>
> +#include <media/tpg/v4l2-tpg.h>
>  #include <media/v4l2-device.h>
>  
>  #include "vimc-common.h"
> @@ -263,6 +265,7 @@ static int vimc_register_devices(struct vimc_device *vimc)
>  
>  static int vimc_probe(struct platform_device *pdev)
>  {
> +	const struct font_desc *font = find_font("VGA8x16");
>  	struct vimc_device *vimc;
>  	int ret;
>  
> @@ -272,6 +275,13 @@ static int vimc_probe(struct platform_device *pdev)
>  	if (!vimc)
>  		return -ENOMEM;
>  
> +	if (!font) {
> +		dev_err(&pdev->dev, "vimc: could not find font\n");
> +		return -ENODEV;

Move this check above the kzalloc(), otherwise there is a memory leak.

> +	}
> +
> +	tpg_set_font(font->data);
> +
>  	vimc->pipe_cfg = &pipe_cfg;
>  
>  	/* Link the media device within the v4l2_device */
> diff --git a/drivers/media/test-drivers/vimc/vimc-sensor.c b/drivers/media/test-drivers/vimc/vimc-sensor.c
> index a2f09ac9a360..d776fdcdc3bf 100644
> --- a/drivers/media/test-drivers/vimc/vimc-sensor.c
> +++ b/drivers/media/test-drivers/vimc/vimc-sensor.c
> @@ -19,6 +19,8 @@ struct vimc_sen_device {
>  	struct v4l2_subdev sd;
>  	struct tpg_data tpg;
>  	u8 *frame;
> +	unsigned show_info;
> +	unsigned ns;
>  	/* The active format */
>  	struct v4l2_mbus_framefmt mbus_format;
>  	struct v4l2_ctrl_handler hdl;
> @@ -185,10 +187,43 @@ static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = {
>  static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
>  				    const void *sink_frame)
>  {
> +	u8 *basep[TPG_MAX_PLANES][2];
> +	char str[100];
> +	int line = 1;
>  	struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
>  						    ved);
>  
>  	tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame);
> +	tpg_calc_text_basep(&vsen->tpg, basep, 0, vsen->frame);
> +
> +	if (vsen->show_info <= 1) {
> +		unsigned ms;
> +
> +		ms = (ktime_get_ns() - vsen->ns) / 1000000;
> +		snprintf(str, sizeof(str), "%02d:%02d:%02d:%03d",
> +			 (ms / (60 * 60 * 1000)) % 24,
> +			 (ms / (60 * 1000)) % 60,
> +			 (ms / 1000) % 60,
> +			 ms % 1000);
> +		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, str);
> +	}
> +
> +	if (vsen->show_info == 0) {
> +		const char *order = tpg_g_color_order(&vsen->tpg);
> +
> +		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, order);
> +		snprintf(str, sizeof(str),
> +			 "brightness %3d, contrast %3d, saturation %3d, hue %d ",
> +			 vsen->tpg.brightness,
> +			 vsen->tpg.contrast,
> +			 vsen->tpg.saturation,
> +			 vsen->tpg.hue);
> +		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, str);
> +		snprintf(str, sizeof(str), "sensor size: %dx%d",
> +			 vsen->mbus_format.width, vsen->mbus_format.height);
> +		tpg_gen_text(&vsen->tpg, basep, line++ * 16, 16, str);
> +	}
> +
>  	return vsen->frame;
>  }
>  
> @@ -201,6 +236,8 @@ static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
>  		const struct vimc_pix_map *vpix;
>  		unsigned int frame_size;
>  
> +		vsen->ns = ktime_get_ns();
> +
>  		/* Calculate the frame size */
>  		vpix = vimc_pix_map_by_code(vsen->mbus_format.code);
>  		frame_size = vsen->mbus_format.width * vpix->bpp *
> @@ -269,6 +306,9 @@ static int vimc_sen_s_ctrl(struct v4l2_ctrl *ctrl)
>  	case V4L2_CID_SATURATION:
>  		tpg_s_saturation(&vsen->tpg, ctrl->val);
>  		break;
> +	case VIMC_CID_SHOW_INFO:
> +		vsen->show_info = ctrl->val;
> +		break;
>  	default:
>  		return -EINVAL;
>  	}
> @@ -307,6 +347,22 @@ static const struct v4l2_ctrl_config vimc_sen_ctrl_test_pattern = {
>  	.qmenu = tpg_pattern_strings,
>  };
>  
> +static const char * const vimc_ctrl_show_info_strings[] = {
> +	"All",
> +	"Counters Only",
> +	"None",
> +	NULL,
> +};
> +
> +static const struct v4l2_ctrl_config vimc_sen_ctrl_show_info = {
> +	.ops = &vimc_sen_ctrl_ops,
> +	.id = VIMC_CID_SHOW_INFO,
> +	.name = "Show Information",

Vivid calls is "OSD Text Mode", maybe we could do the same.
And rename the id to VIMC_CID_OSD_TEXT_MODE and all the show_info to osd_mode.

Regards,
Helen

> +	.type = V4L2_CTRL_TYPE_MENU,
> +	.max = ARRAY_SIZE(vimc_ctrl_show_info_strings) - 2,
> +	.qmenu = vimc_ctrl_show_info_strings,
> +};
> +
>  static struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
>  					    const char *vcfg_name)
>  {
> @@ -323,6 +379,7 @@ static struct vimc_ent_device *vimc_sen_add(struct vimc_device *vimc,
>  
>  	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_class, NULL);
>  	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_test_pattern, NULL);
> +	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_show_info, NULL);
>  	v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
>  			  V4L2_CID_VFLIP, 0, 1, 1, 0);
>  	v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
>