[PATCH V2 4/8] Add new mode function in drm backend

[Quanxian Wang]

Provide drm_output_new_mode interface to create new mode
from outsite instead of only from edid or configure.

Signed-off-by: Quanxian Wang <quanxian.wang at intel.com>
---
 src/compositor-drm.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)

diff --git a/src/compositor-drm.c b/src/compositor-drm.c
index 154e15e..577d02f 100644
--- a/src/compositor-drm.c
+++ b/src/compositor-drm.c
@@ -1389,6 +1389,72 @@ drm_output_add_mode(struct drm_output *output, drmModeModeInfo *info)
 	return mode;
 }
 
+static struct weston_mode *
+drm_output_new_mode(struct weston_output *output,
+		    int fclock,
+		    int hdisplay,
+		    int hsync_start,
+		    int hsync_end,
+		    int htotal,
+		    int vdisplay,
+		    int vsync_start,
+		    int vsync_end,
+		    int vtotal,
+		    const char *hsync,
+		    const char *vsync)
+{
+	drmModeModeInfo *modeinfo;
+	struct drm_mode *mode = NULL;
+
+	modeinfo = malloc(sizeof(*modeinfo));
+	if (modeinfo == NULL)
+		return NULL;
+	memset(modeinfo, 0x0, sizeof(*modeinfo));
+
+	modeinfo->type = DRM_MODE_TYPE_USERDEF;
+	modeinfo->hskew = 0;
+	modeinfo->vscan = 0;
+	modeinfo->vrefresh = 0;
+	modeinfo->flags = 0;
+
+	modeinfo->hdisplay = hdisplay;
+	modeinfo->hsync_start = hsync_start;
+	modeinfo->hsync_end = hsync_end;
+	modeinfo->htotal = htotal;
+	modeinfo->vdisplay = vdisplay;
+	modeinfo->vsync_start = vsync_start;
+	modeinfo->vsync_end = vsync_end;
+	modeinfo->vtotal = vtotal;
+
+	modeinfo->clock = fclock * 1000;
+
+	if (strcmp(hsync, "+hsync") == 0)
+		modeinfo->flags |= DRM_MODE_FLAG_PHSYNC;
+	else if (strcmp(hsync, "-hsync") == 0)
+		modeinfo->flags |= DRM_MODE_FLAG_NHSYNC;
+	else {
+		weston_log("Invalid hsync parameter %s.\n", hsync);
+		free(modeinfo);
+		return NULL;
+	}
+
+	if (strcmp(vsync, "+vsync") == 0)
+		modeinfo->flags |= DRM_MODE_FLAG_PVSYNC;
+	else if (strcmp(vsync, "-vsync") == 0)
+		modeinfo->flags |= DRM_MODE_FLAG_NVSYNC;
+	else {
+		weston_log("Invalid vsync parameter %s.\n", vsync);
+		free(modeinfo);
+		return NULL;
+	}
+
+	mode = drm_output_add_mode((struct drm_output *)output, modeinfo);
+	if (mode)
+		return &mode->base;
+	else
+		return NULL;
+}
+
 static int
 drm_subpixel_to_wayland(int drm_value)
 {
@@ -2046,6 +2112,7 @@ create_output_for_connector(struct drm_compositor *ec,
 	output->base.assign_planes = drm_assign_planes;
 	output->base.set_dpms = drm_set_dpms;
 	output->base.switch_mode = drm_output_switch_mode;
+	output->base.new_mode = drm_output_new_mode;
 
 	output->base.gamma_size = output->original_crtc->gamma_size;
 	output->base.set_gamma = drm_output_set_gamma;
-- 
1.8.1.2