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author | Thierry Reding <treding@nvidia.com> | 2014-08-05 09:20:25 (GMT) |
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committer | Thierry Reding <treding@nvidia.com> | 2014-11-13 12:56:10 (GMT) |
commit | 3b46d4a0def157e77000e252bf5caae7d3defe1b (patch) | |
tree | ac24dade46621c6dc0b9adeb65fef358fd7b0e34 | |
parent | 5cc0af16fc08cfb749fd0635e5e9187c31826827 (diff) | |
download | linux-3b46d4a0def157e77000e252bf5caae7d3defe1b.tar.xz |
drm/dsi: Implement DCS set_{column,page}_address commands
Provide small convenience wrappers to set the column and page extents of
the frame memory accessed by the host processors.
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
-rw-r--r-- | drivers/gpu/drm/drm_mipi_dsi.c | 48 | ||||
-rw-r--r-- | include/drm/drm_mipi_dsi.h | 4 |
2 files changed, 52 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index eb5ed0b..2f39372 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -729,6 +729,54 @@ int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi) EXPORT_SYMBOL(mipi_dsi_dcs_set_display_on); /** + * mipi_dsi_dcs_set_column_address() - define the column extent of the frame + * memory accessed by the host processor + * @dsi: DSI peripheral device + * @start: first column of frame memory + * @end: last column of frame memory + * + * Return: 0 on success or a negative error code on failure. + */ +int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start, + u16 end) +{ + u8 payload[4] = { start >> 8, start & 0xff, end >> 8, end & 0xff }; + ssize_t err; + + err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_COLUMN_ADDRESS, payload, + sizeof(payload)); + if (err < 0) + return err; + + return 0; +} +EXPORT_SYMBOL(mipi_dsi_dcs_set_column_address); + +/** + * mipi_dsi_dcs_set_page_address() - define the page extent of the frame + * memory accessed by the host processor + * @dsi: DSI peripheral device + * @start: first page of frame memory + * @end: last page of frame memory + * + * Return: 0 on success or a negative error code on failure. + */ +int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start, + u16 end) +{ + u8 payload[4] = { start >> 8, start & 0xff, end >> 8, end & 0xff }; + ssize_t err; + + err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PAGE_ADDRESS, payload, + sizeof(payload)); + if (err < 0) + return err; + + return 0; +} +EXPORT_SYMBOL(mipi_dsi_dcs_set_page_address); + +/** * mipi_dsi_dcs_set_tear_off() - turn off the display module's Tearing Effect * output signal on the TE signal line * @dsi: DSI peripheral device diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 79927f2..061a792 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -205,6 +205,10 @@ int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi); +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_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); |