drm/i915: Fix TV get_modes to return modes count

The get_modes hook must return the number of modes added.  This also fixes
TV mode's clock calculation int overflow issue, and use 0.01 precision for
mode refresh validation.

Signed-off-by: Zhenyu Wang <zhenyu.z.wang@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index 0e60685..08c4034 100644 (file)
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1082,7 +1082,7 @@ intel_tv_mode_valid(struct drm_connector *connector, struct drm_display_mode *mo
        const struct tv_mode *tv_mode = intel_tv_mode_find(intel_output);
 
        /* Ensure TV refresh is close to desired refresh */
-       if (tv_mode && abs(tv_mode->refresh - drm_mode_vrefresh(mode)) < 1)
+       if (tv_mode && abs(tv_mode->refresh - drm_mode_vrefresh(mode)) < 10)
                return MODE_OK;
        return MODE_CLOCK_RANGE;
 }
@@ -1495,7 +1495,8 @@ intel_tv_get_modes(struct drm_connector *connector)
        struct drm_display_mode *mode_ptr;
        struct intel_output *intel_output = to_intel_output(connector);
        const struct tv_mode *tv_mode = intel_tv_mode_find(intel_output);
-       int j;
+       int j, count = 0;
+       u64 tmp;
 
        for (j = 0; j < sizeof(input_res_table) / sizeof(input_res_table[0]);
             j++) {
@@ -1510,8 +1511,9 @@ intel_tv_get_modes(struct drm_connector *connector)
                                        && !tv_mode->component_only))
                        continue;
 
-               mode_ptr = drm_calloc(1, sizeof(struct drm_display_mode),
-                                     DRM_MEM_DRIVER);
+               mode_ptr = drm_mode_create(connector->dev);
+               if (!mode_ptr)
+                       continue;
                strncpy(mode_ptr->name, input->name, DRM_DISPLAY_MODE_LEN);
 
                mode_ptr->hdisplay = hactive_s;
@@ -1528,15 +1530,17 @@ intel_tv_get_modes(struct drm_connector *connector)
                        mode_ptr->vsync_end = mode_ptr->vsync_start  + 1;
                mode_ptr->vtotal = vactive_s + 33;
 
-               mode_ptr->clock = (int) (tv_mode->refresh *
-                                        mode_ptr->vtotal *
-                                        mode_ptr->htotal / 1000) / 1000;
+               tmp = (u64) tv_mode->refresh * mode_ptr->vtotal;
+               tmp *= mode_ptr->htotal;
+               tmp = div_u64(tmp, 1000000);
+               mode_ptr->clock = (int) tmp;
 
                mode_ptr->type = DRM_MODE_TYPE_DRIVER;
                drm_mode_probed_add(connector, mode_ptr);
+               count++;
        }
 
-       return 0;
+       return count;
 }
 
 static void