* [PATCH v2] drm/dsi: Implement set tear scanline
@ 2016-06-06 17:41 Vinay Simha BN
2016-06-07 6:54 ` Jani Nikula
0 siblings, 1 reply; 2+ messages in thread
From: Vinay Simha BN @ 2016-06-06 17:41 UTC (permalink / raw)
Cc: Vinay Simha BN, Archit Taneja, John Stultz, Thierry Reding,
Sumit Semwal, Jani Nikula, David Airlie, open list:DRM DRIVERS,
open list
Provide a small convenience wrapper that transmits
a set_tear_scanline command.
Also includes small build fixes from Sumit Semwal.
Cc: Archit Taneja <archit.taneja@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Vinay Simha BN <simhavcs@gmail.com>
--
v1:
* helper function suggested by Thierry
for set_tear_scanline
v2:
* one scanline parameter suggested by jani
---
drivers/gpu/drm/drm_mipi_dsi.c | 22 ++++++++++++++++++++++
include/drm/drm_mipi_dsi.h | 1 +
2 files changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index f5d8083..c02d083 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -983,6 +983,28 @@ int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_on);
/**
+ * mipi_dsi_set_tear_scanline() - turn on the display module's Tearing Effect
+ * output signal on the TE signal line when display module reaches line N
+ * defined by STS[n:0].
+ * @dsi: DSI peripheral device
+ * @param: STS[10:0]
+ * Return: 0 on success or a negative error code on failure
+ */
+int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, u16 param)
+{
+ u8 payload[3] = { MIPI_DCS_SET_TEAR_SCANLINE, param >> 8,
+ param & 0xff };
+ ssize_t err;
+
+ err = mipi_dsi_generic_write(dsi, &payload, sizeof(payload));
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+EXPORT_SYMBOL(mipi_dsi_set_tear_scanline);
+
+/**
* mipi_dsi_dcs_set_pixel_format() - sets the pixel format for the RGB image
* data used by the interface
* @dsi: DSI peripheral device
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 7a9840f..ec55285 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -263,6 +263,7 @@ int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,
u16 end);
int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,
u16 end);
+int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, u16 param);
int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi);
int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
enum mipi_dsi_dcs_tear_mode mode);
--
1.9.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2] drm/dsi: Implement set tear scanline
2016-06-06 17:41 [PATCH v2] drm/dsi: Implement set tear scanline Vinay Simha BN
@ 2016-06-07 6:54 ` Jani Nikula
0 siblings, 0 replies; 2+ messages in thread
From: Jani Nikula @ 2016-06-07 6:54 UTC (permalink / raw)
To: Vinay Simha BN
Cc: Vinay Simha BN, Archit Taneja, John Stultz, Thierry Reding,
Sumit Semwal, David Airlie, open list:DRM DRIVERS, open list
On Mon, 06 Jun 2016, Vinay Simha BN <simhavcs@gmail.com> wrote:
> Provide a small convenience wrapper that transmits
> a set_tear_scanline command.
>
> Also includes small build fixes from Sumit Semwal.
>
> Cc: Archit Taneja <archit.taneja@gmail.com>
> Cc: John Stultz <john.stultz@linaro.org>
> Cc: Thierry Reding <thierry.reding@gmail.com>
> Cc: Sumit Semwal <sumit.semwal@linaro.org>
> Cc: Jani Nikula <jani.nikula@linux.intel.com>
> Signed-off-by: Vinay Simha BN <simhavcs@gmail.com>
> --
> v1:
> * helper function suggested by Thierry
> for set_tear_scanline
> v2:
> * one scanline parameter suggested by jani
> ---
> drivers/gpu/drm/drm_mipi_dsi.c | 22 ++++++++++++++++++++++
> include/drm/drm_mipi_dsi.h | 1 +
> 2 files changed, 23 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
> index f5d8083..c02d083 100644
> --- a/drivers/gpu/drm/drm_mipi_dsi.c
> +++ b/drivers/gpu/drm/drm_mipi_dsi.c
> @@ -983,6 +983,28 @@ int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
> EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_on);
>
> /**
> + * mipi_dsi_set_tear_scanline() - turn on the display module's Tearing Effect
> + * output signal on the TE signal line when display module reaches line N
> + * defined by STS[n:0].
> + * @dsi: DSI peripheral device
> + * @param: STS[10:0]
> + * Return: 0 on success or a negative error code on failure
> + */
> +int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, u16 param)
> +{
> + u8 payload[3] = { MIPI_DCS_SET_TEAR_SCANLINE, param >> 8,
> + param & 0xff };
> + ssize_t err;
> +
> + err = mipi_dsi_generic_write(dsi, &payload, sizeof(payload));
You can just pass in payload, not &payload.
BR,
Jani.
> + if (err < 0)
> + return err;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(mipi_dsi_set_tear_scanline);
> +
> +/**
> * mipi_dsi_dcs_set_pixel_format() - sets the pixel format for the RGB image
> * data used by the interface
> * @dsi: DSI peripheral device
> diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
> index 7a9840f..ec55285 100644
> --- a/include/drm/drm_mipi_dsi.h
> +++ b/include/drm/drm_mipi_dsi.h
> @@ -263,6 +263,7 @@ int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,
> u16 end);
> int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,
> u16 end);
> +int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, u16 param);
> int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi);
> int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
> enum mipi_dsi_dcs_tear_mode mode);
--
Jani Nikula, Intel Open Source Technology Center
^ permalink raw reply [flat|nested] 2+ messages in thread
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