To support LCD I80 interface, the DSI host calls this function to notify the panel tearing effect synchronization signal to the CRTC device manager to trigger to transfer video image. Signed-off-by: YoungJun Cho <yj44.cho@xxxxxxxxxxx> Acked-by: Inki Dae <inki.dae@xxxxxxxxxxx> Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> --- drivers/gpu/drm/exynos/exynos_drm_dsi.c | 11 +++++++++++ include/drm/drm_mipi_dsi.h | 7 +++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index dad543a..76e34ca 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -24,6 +24,7 @@ #include <video/mipi_display.h> #include <video/videomode.h> +#include "exynos_drm_crtc.h" #include "exynos_drm_drv.h" /* returns true iff both arguments logically differs */ @@ -1041,10 +1042,20 @@ static ssize_t exynos_dsi_host_transfer(struct mipi_dsi_host *host, return (ret < 0) ? ret : xfer.rx_done; } +static void exynos_dsi_host_pass_te(struct mipi_dsi_host *host) +{ + struct exynos_dsi *dsi = host_to_dsi(host); + struct drm_encoder *encoder = dsi->encoder; + + if (dsi->state & DSIM_STATE_ENABLED) + exynos_drm_crtc_te_handler(encoder->crtc); +} + static const struct mipi_dsi_host_ops exynos_dsi_ops = { .attach = exynos_dsi_host_attach, .detach = exynos_dsi_host_detach, .transfer = exynos_dsi_host_transfer, + .pass_te = exynos_dsi_host_pass_te, }; static int exynos_dsi_poweron(struct exynos_dsi *dsi) diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 944f33f..3f21bea 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -49,6 +49,12 @@ struct mipi_dsi_msg { * @detach: detach DSI device from DSI host * @transfer: send and/or receive DSI packet, return number of received bytes, * or error + * @pass_te: call the crtc te_handler() callback from DSI host. + * The panel generates tearing effect synchronization signal between + * MCU and FB to display video images. And the display controller + * should trigger to transfer video image at this signal. So the panel + * receives the TE IRQ, then calls this function to notify it to the + * display controller. */ struct mipi_dsi_host_ops { int (*attach)(struct mipi_dsi_host *host, @@ -57,6 +63,7 @@ struct mipi_dsi_host_ops { struct mipi_dsi_device *dsi); ssize_t (*transfer)(struct mipi_dsi_host *host, struct mipi_dsi_msg *msg); + void (*pass_te)(struct mipi_dsi_host *host); }; /** -- 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html