[media] v4l2-dv-timings: add new arg to v4l2_match_dv_timings

Add the new match_reduced_fps argument to v4l2_match_dv_timings().
Depending on the situation you may or may not desire to match the
reduced_fps flag. Typically only HDMI transmitters will need to
check for this flag.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

11 files changed, 24 insertions, 17 deletions

diff --git a/Documentation/video4linux/v4l2-pci-skeleton.c b/Documentation/video4linux/v4l2-pci-skeleton.c
index 95ae82860092..1c8b102a6529 100644
--- a/Documentation/video4linux/v4l2-pci-skeleton.c
+++ b/Documentation/video4linux/v4l2-pci-skeleton.c
@@ -509,7 +509,7 @@ static int skeleton_s_dv_timings(struct file *file, void *_fh,
                 return -EINVAL;
 
         /* Return 0 if the new timings are the same as the current timings. */
-        if (v4l2_match_dv_timings(timings, &skel->timings, 0))
+        if (v4l2_match_dv_timings(timings, &skel->timings, 0, false))
                 return 0;
 
         /*
diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index 2c3c37c3c2dc..745286225655 100644
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c
@@ -905,7 +905,7 @@ static int find_and_set_predefined_video_timings(struct v4l2_subdev *sd,
 
         for (i = 0; predef_vid_timings[i].timings.bt.width; i++) {
                 if (!v4l2_match_dv_timings(timings, &predef_vid_timings[i].timings,
-                                        is_digital_input(sd) ? 250000 : 1000000))
+                                is_digital_input(sd) ? 250000 : 1000000, false))
                         continue;
                 io_write(sd, 0x00, predef_vid_timings[i].vid_std); /* video std */
                 io_write(sd, 0x01, (predef_vid_timings[i].v_freq << 4) +
@@ -1479,7 +1479,7 @@ static void adv76xx_fill_optional_dv_timings_fields(struct v4l2_subdev *sd,
 
         for (i = 0; adv76xx_timings[i].bt.width; i++) {
                 if (v4l2_match_dv_timings(timings, &adv76xx_timings[i],
-                                        is_digital_input(sd) ? 250000 : 1000000)) {
+                                is_digital_input(sd) ? 250000 : 1000000, false)) {
                         *timings = adv76xx_timings[i];
                         break;
                 }
@@ -1644,7 +1644,7 @@ static int adv76xx_s_dv_timings(struct v4l2_subdev *sd,
         if (!timings)
                 return -EINVAL;
 
-        if (v4l2_match_dv_timings(&state->timings, timings, 0)) {
+        if (v4l2_match_dv_timings(&state->timings, timings, 0, false)) {
                 v4l2_dbg(1, debug, sd, "%s: no change\n", __func__);
                 return 0;
         }
diff --git a/drivers/media/i2c/adv7842.c b/drivers/media/i2c/adv7842.c
index ded871e361e4..69378e4914b6 100644
--- a/drivers/media/i2c/adv7842.c
+++ b/drivers/media/i2c/adv7842.c
@@ -155,7 +155,7 @@ static bool adv7842_check_dv_timings(const struct v4l2_dv_timings *t, void *hdl)
         int i;
 
         for (i = 0; adv7842_timings_exceptions[i].bt.width; i++)
-                if (v4l2_match_dv_timings(t, adv7842_timings_exceptions + i, 0))
+                if (v4l2_match_dv_timings(t, adv7842_timings_exceptions + i, 0, false))
                         return false;
         return true;
 }
@@ -1008,7 +1008,7 @@ static int find_and_set_predefined_video_timings(struct v4l2_subdev *sd,
 
         for (i = 0; predef_vid_timings[i].timings.bt.width; i++) {
                 if (!v4l2_match_dv_timings(timings, &predef_vid_timings[i].timings,
-                                          is_digital_input(sd) ? 250000 : 1000000))
+                                  is_digital_input(sd) ? 250000 : 1000000, false))
                         continue;
                 /* video std */
                 io_write(sd, 0x00, predef_vid_timings[i].vid_std);
@@ -1659,7 +1659,7 @@ static int adv7842_s_dv_timings(struct v4l2_subdev *sd,
         if (state->mode == ADV7842_MODE_SDP)
                 return -ENODATA;
 
-        if (v4l2_match_dv_timings(&state->timings, timings, 0)) {
+        if (v4l2_match_dv_timings(&state->timings, timings, 0, false)) {
                 v4l2_dbg(1, debug, sd, "%s: no change\n", __func__);
                 return 0;
         }
diff --git a/drivers/media/i2c/tc358743.c b/drivers/media/i2c/tc358743.c
index 06856b8bb696..77b801152ea5 100644
--- a/drivers/media/i2c/tc358743.c
+++ b/drivers/media/i2c/tc358743.c
@@ -862,7 +862,7 @@ static void tc358743_format_change(struct v4l2_subdev *sd)
                 v4l2_dbg(1, debug, sd, "%s: Format changed. No signal\n",
                                 __func__);
         } else {
-                if (!v4l2_match_dv_timings(&state->timings, &timings, 0))
+                if (!v4l2_match_dv_timings(&state->timings, &timings, 0, false))
                         enable_stream(sd, false);
 
                 v4l2_print_dv_timings(sd->name,
@@ -1366,7 +1366,7 @@ static int tc358743_s_dv_timings(struct v4l2_subdev *sd,
                 v4l2_print_dv_timings(sd->name, "tc358743_s_dv_timings: ",
                                 timings, false);
 
-        if (v4l2_match_dv_timings(&state->timings, timings, 0)) {
+        if (v4l2_match_dv_timings(&state->timings, timings, 0, false)) {
                 v4l2_dbg(1, debug, sd, "%s: no change\n", __func__);
                 return 0;
         }
diff --git a/drivers/media/pci/cobalt/cobalt-v4l2.c b/drivers/media/pci/cobalt/cobalt-v4l2.c
index b1cb061be68d..8cc78c522ac9 100644
--- a/drivers/media/pci/cobalt/cobalt-v4l2.c
+++ b/drivers/media/pci/cobalt/cobalt-v4l2.c
@@ -649,7 +649,7 @@ static int cobalt_s_dv_timings(struct file *file, void *priv_fh,
                 return 0;
         }
 
-        if (v4l2_match_dv_timings(timings, &s->timings, 0))
+        if (v4l2_match_dv_timings(timings, &s->timings, 0, false))
                 return 0;
 
         if (vb2_is_busy(&s->q))
diff --git a/drivers/media/platform/s5p-tv/hdmi_drv.c b/drivers/media/platform/s5p-tv/hdmi_drv.c
index a03ea98c4a2e..e71b13e40f59 100644
--- a/drivers/media/platform/s5p-tv/hdmi_drv.c
+++ b/drivers/media/platform/s5p-tv/hdmi_drv.c
@@ -627,7 +627,7 @@ static int hdmi_s_dv_timings(struct v4l2_subdev *sd,
 
         for (i = 0; i < ARRAY_SIZE(hdmi_timings); i++)
                 if (v4l2_match_dv_timings(&hdmi_timings[i].dv_timings,
-                                        timings, 0))
+                                        timings, 0, false))
                         break;
         if (i == ARRAY_SIZE(hdmi_timings)) {
                 dev_err(dev, "timings not supported\n");
diff --git a/drivers/media/platform/vivid/vivid-vid-cap.c b/drivers/media/platform/vivid/vivid-vid-cap.c
index 45a2ed85ad83..9cc07c65a564 100644
--- a/drivers/media/platform/vivid/vivid-vid-cap.c
+++ b/drivers/media/platform/vivid/vivid-vid-cap.c
@@ -1670,7 +1670,7 @@ int vivid_vid_cap_s_dv_timings(struct file *file, void *_fh,
             !valid_cvt_gtf_timings(timings))
                 return -EINVAL;
 
-        if (v4l2_match_dv_timings(timings, &dev->dv_timings_cap, 0))
+        if (v4l2_match_dv_timings(timings, &dev->dv_timings_cap, 0, false))
                 return 0;
         if (vb2_is_busy(&dev->vb_vid_cap_q))
                 return -EBUSY;
diff --git a/drivers/media/platform/vivid/vivid-vid-out.c b/drivers/media/platform/vivid/vivid-vid-out.c
index db645abd4967..1f3b08166e74 100644
--- a/drivers/media/platform/vivid/vivid-vid-out.c
+++ b/drivers/media/platform/vivid/vivid-vid-out.c
@@ -1156,7 +1156,7 @@ int vivid_vid_out_s_dv_timings(struct file *file, void *_fh,
                                 0, NULL, NULL) &&
             !valid_cvt_gtf_timings(timings))
                 return -EINVAL;
-        if (v4l2_match_dv_timings(timings, &dev->dv_timings_out, 0))
+        if (v4l2_match_dv_timings(timings, &dev->dv_timings_out, 0, true))
                 return 0;
         if (vb2_is_busy(&dev->vb_vid_out_q))
                 return -EBUSY;
diff --git a/drivers/media/usb/hdpvr/hdpvr-video.c b/drivers/media/usb/hdpvr/hdpvr-video.c
index d8d8c0f519fc..7dee22deebf3 100644
--- a/drivers/media/usb/hdpvr/hdpvr-video.c
+++ b/drivers/media/usb/hdpvr/hdpvr-video.c
@@ -642,7 +642,7 @@ static int vidioc_s_dv_timings(struct file *file, void *_fh,
         if (dev->status != STATUS_IDLE)
                 return -EBUSY;
         for (i = 0; i < ARRAY_SIZE(hdpvr_dv_timings); i++)
-                if (v4l2_match_dv_timings(timings, hdpvr_dv_timings + i, 0))
+                if (v4l2_match_dv_timings(timings, hdpvr_dv_timings + i, 0, false))
                         break;
         if (i == ARRAY_SIZE(hdpvr_dv_timings))
                 return -EINVAL;
diff --git a/drivers/media/v4l2-core/v4l2-dv-timings.c b/drivers/media/v4l2-core/v4l2-dv-timings.c
index 9926d521ea88..ec258b73001a 100644
--- a/drivers/media/v4l2-core/v4l2-dv-timings.c
+++ b/drivers/media/v4l2-core/v4l2-dv-timings.c
@@ -209,7 +209,7 @@ bool v4l2_find_dv_timings_cap(struct v4l2_dv_timings *t,
                 if (v4l2_valid_dv_timings(v4l2_dv_timings_presets + i, cap,
                                           fnc, fnc_handle) &&
                     v4l2_match_dv_timings(t, v4l2_dv_timings_presets + i,
-                                          pclock_delta)) {
+                                          pclock_delta, false)) {
                         u32 flags = t->bt.flags & V4L2_DV_FL_REDUCED_FPS;
 
                         *t = v4l2_dv_timings_presets[i];
@@ -228,12 +228,14 @@ EXPORT_SYMBOL_GPL(v4l2_find_dv_timings_cap);
  * @t1 - compare this v4l2_dv_timings struct...
  * @t2 - with this struct.
  * @pclock_delta - the allowed pixelclock deviation.
+ * @match_reduced_fps - if true, then fail if V4L2_DV_FL_REDUCED_FPS does not
+ * match.
  *
  * Compare t1 with t2 with a given margin of error for the pixelclock.
  */
 bool v4l2_match_dv_timings(const struct v4l2_dv_timings *t1,
                            const struct v4l2_dv_timings *t2,
-                           unsigned pclock_delta)
+                           unsigned pclock_delta, bool match_reduced_fps)
 {
         if (t1->type != t2->type || t1->type != V4L2_DV_BT_656_1120)
                 return false;
@@ -249,6 +251,9 @@ bool v4l2_match_dv_timings(const struct v4l2_dv_timings *t1,
             t1->bt.vfrontporch == t2->bt.vfrontporch &&
             t1->bt.vsync == t2->bt.vsync &&
             t1->bt.vbackporch == t2->bt.vbackporch &&
+            (!match_reduced_fps ||
+             (t1->bt.flags & V4L2_DV_FL_REDUCED_FPS) ==
+                (t2->bt.flags & V4L2_DV_FL_REDUCED_FPS)) &&
             (!t1->bt.interlaced ||
                 (t1->bt.il_vfrontporch == t2->bt.il_vfrontporch &&
                  t1->bt.il_vsync == t2->bt.il_vsync &&
diff --git a/include/media/v4l2-dv-timings.h b/include/media/v4l2-dv-timings.h
index 69829a5a1368..1113c8874c26 100644
--- a/include/media/v4l2-dv-timings.h
+++ b/include/media/v4l2-dv-timings.h
@@ -107,12 +107,14 @@ bool v4l2_find_dv_timings_cap(struct v4l2_dv_timings *t,
  * @standard:     the timings according to the standard.
  * @pclock_delta: maximum delta in Hz between standard->pixelclock and
  *              the measured timings.
+ * @match_reduced_fps: if true, then fail if V4L2_DV_FL_REDUCED_FPS does not
+ * match.
  *
  * Returns true if the two timings match, returns false otherwise.
  */
 bool v4l2_match_dv_timings(const struct v4l2_dv_timings *measured,
                            const struct v4l2_dv_timings *standard,
-                           unsigned pclock_delta);
+                           unsigned pclock_delta, bool match_reduced_fps);
 
 /**
  * v4l2_print_dv_timings() - log the contents of a dv_timings struct