From 988ac19a0c30a84b2f86c5bfb035805e4ae48cb3 Mon Sep 17 00:00:00 2001 From: Bang Nguyen Date: Wed, 24 Jul 2019 07:55:25 -0500 Subject: [PATCH] drm/dsi: Implement DCS set disp brightness 2bytes Provide a small convenience wrapper that set the display 2bytes brightness Port from: 4a5c926 Change-Id: Iadfcb1d6cdf4866391f36ee970d79840e109fe9a Signed-off-by: Bang Nguyen Reviewed-on: https://gerrit.mot.com/1410287 SME-Granted: SME Approvals Granted SLTApproved: Slta Waiver Tested-by: Jira Key Submit-Approved: Jira Key Reviewed-on: https://gerrit.mot.com/1509783 Reviewed-by: Xiangpo Zhao --- drivers/gpu/drm/drm_mipi_dsi.c | 23 +++++++++++++++++++++++ include/drm/drm_mipi_dsi.h | 3 +++ 2 files changed, 26 insertions(+) diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index c3f9967b4fe1..b142e3d3b546 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -1096,6 +1096,29 @@ int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi, } EXPORT_SYMBOL(mipi_dsi_dcs_get_display_brightness); +/** + * mipi_dsi_dcs_set_display_brightness_2bytes() - sets the brightness value of + * the display with 2bytes value + * @dsi: DSI peripheral device + * @brightness: brightness value + * + * Return: 0 on success or a negative error code on failure. + */ +int mipi_dsi_dcs_set_display_brightness_2bytes(struct mipi_dsi_device *dsi, + u16 brightness) +{ + u8 payload[2] = { (brightness & 0xff00) >> 8, brightness & 0xff}; + ssize_t err; + + err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, + payload, sizeof(payload)); + if (err < 0) + return err; + + return 0; +} +EXPORT_SYMBOL(mipi_dsi_dcs_set_display_brightness_2bytes); + static int mipi_dsi_drv_probe(struct device *dev) { struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver); diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 328f232f33ee..eda7c7806879 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -286,6 +286,9 @@ int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi, u16 brightness); int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi, u16 *brightness); +int mipi_dsi_dcs_set_display_brightness_2bytes(struct mipi_dsi_device *dsi, + u16 brightness); + /** * struct mipi_dsi_driver - DSI driver