mode_valid function is missing for lvds.
Add it based on rgb model, also setting up dclk_min_div and dclk_max_div
Signed-off-by: Giulio Benetti <giulio.bene...@micronovasrl.com>
---
drivers/gpu/drm/sun4i/sun4i_lvds.c | 55 ++++++++++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
diff --git a/drivers/gpu/drm/sun4i/sun4i_lvds.c
b/drivers/gpu/drm/sun4i/sun4i_lvds.c
index be3f14d..75223ee 100644
--- a/drivers/gpu/drm/sun4i/sun4i_lvds.c
+++ b/drivers/gpu/drm/sun4i/sun4i_lvds.c
@@ -46,8 +46,63 @@ static int sun4i_lvds_get_modes(struct drm_connector
*connector)
return drm_panel_get_modes(tcon->panel);
}
+static int sun4i_lvds_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ struct sun4i_lvds *lvds = drm_connector_to_sun4i_lvds(connector);
+ struct sun4i_tcon *tcon = lvds->tcon;
+ u32 hsync = mode->hsync_end - mode->hsync_start;
+ u32 vsync = mode->vsync_end - mode->vsync_start;
+ unsigned long rate = mode->clock * 1000;
+ long rounded_rate;
+
+ DRM_DEBUG_DRIVER("Validating modes...\n");
+
+ if (hsync < 1)
+ return MODE_HSYNC_NARROW;
+
+ if (hsync > 0x3ff)
+ return MODE_HSYNC_WIDE;
+
+ if ((mode->hdisplay < 1) || (mode->htotal < 1))
+ return MODE_H_ILLEGAL;
+
+ if ((mode->hdisplay > 0x7ff) || (mode->htotal > 0xfff))
+ return MODE_BAD_HVALUE;
+
+ DRM_DEBUG_DRIVER("Horizontal parameters OK\n");
+
+ if (vsync < 1)
+ return MODE_VSYNC_NARROW;
+
+ if (vsync > 0x3ff)
+ return MODE_VSYNC_WIDE;
+
+ if ((mode->vdisplay < 1) || (mode->vtotal < 1))
+ return MODE_V_ILLEGAL;
+
+ if ((mode->vdisplay > 0x7ff) || (mode->vtotal > 0xfff))
+ return MODE_BAD_VVALUE;
+
+ DRM_DEBUG_DRIVER("Vertical parameters OK\n");
+
+ tcon->dclk_min_div = 7;
+ tcon->dclk_max_div = 18;
+ rounded_rate = clk_round_rate(tcon->dclk, rate);
+ if (rounded_rate < rate)
+ return MODE_CLOCK_LOW;
+
+ if (rounded_rate > rate)
+ return MODE_CLOCK_HIGH;
+
+ DRM_DEBUG_DRIVER("Clock rate OK\n");
+
+ return MODE_OK;
+}
+
static struct drm_connector_helper_funcs sun4i_lvds_con_helper_funcs = {
.get_modes = sun4i_lvds_get_modes,
+ .mode_valid = sun4i_lvds_mode_valid,
};
static void
--
2.7.4
