diff options
Diffstat (limited to 'drivers/gpu/drm/bridge/ti-tfp410.c')
| -rw-r--r-- | drivers/gpu/drm/bridge/ti-tfp410.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c index e3eb6364c0f7..ba3fa2a9b8a4 100644 --- a/drivers/gpu/drm/bridge/ti-tfp410.c +++ b/drivers/gpu/drm/bridge/ti-tfp410.c @@ -51,11 +51,15 @@ static int tfp410_get_modes(struct drm_connector *connector) struct edid *edid; int ret; - edid = drm_bridge_get_edid(dvi->next_bridge, connector); - if (IS_ERR_OR_NULL(edid)) { - if (edid != ERR_PTR(-ENOTSUPP)) + if (dvi->next_bridge->ops & DRM_BRIDGE_OP_EDID) { + edid = drm_bridge_get_edid(dvi->next_bridge, connector); + if (!edid) DRM_INFO("EDID read failed. Fallback to standard modes\n"); + } else { + edid = NULL; + } + if (!edid) { /* * No EDID, fallback on the XGA standard modes and prefer a mode * pretty much anything can handle. @@ -188,6 +192,7 @@ static void tfp410_disable(struct drm_bridge *bridge) } static enum drm_mode_status tfp410_mode_valid(struct drm_bridge *bridge, + const struct drm_display_info *info, const struct drm_display_mode *mode) { if (mode->clock < 25000) @@ -220,7 +225,7 @@ static int tfp410_parse_timings(struct tfp410 *dvi, bool i2c) struct device_node *ep; u32 pclk_sample = 0; u32 bus_width = 24; - s32 deskew = 0; + u32 deskew = 0; /* Start with defaults. */ *timings = tfp410_default_timings; @@ -274,12 +279,12 @@ static int tfp410_parse_timings(struct tfp410 *dvi, bool i2c) } /* Get the setup and hold time from vendor-specific properties. */ - of_property_read_u32(dvi->dev->of_node, "ti,deskew", (u32 *)&deskew); - if (deskew < -4 || deskew > 3) + of_property_read_u32(dvi->dev->of_node, "ti,deskew", &deskew); + if (deskew > 7) return -EINVAL; - timings->setup_time_ps = min(0, 1200 - 350 * deskew); - timings->hold_time_ps = min(0, 1300 + 350 * deskew); + timings->setup_time_ps = 1200 - 350 * ((s32)deskew - 4); + timings->hold_time_ps = max(0, 1300 + 350 * ((s32)deskew - 4)); return 0; } |