Hello Ville,
On 9/25/2019 7:24 PM, Ville Syrjala wrote:
From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
We're going to need two cea mode tables (on for VICs < 128,
another one for VICs >= 193). To that end replace the direct
edid_cea_modes[] lookups with a function call. And we'll rename
the array to edid_cea_modes_0[] to indicathe how it's to be
Should we call it something which indicates the spec version, instead of
a random '0', like edid_cea_861_F_modes[] and the next one as _G_modes
or CTA_3 modes ?
indexed.
Cc: Hans Verkuil <hansverk@xxxxxxxxx>
Cc: Shashank Sharma <shashank.sharma@xxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_edid.c | 80 +++++++++++++++++++++++++++-----------
1 file changed, 58 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 3c9703b08491..b700fc075257 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -707,12 +707,11 @@ static const struct minimode extra_modes[] = {
};
/*
- * Probably taken from CEA-861 spec.
- * This table is converted from xorg's hw/xfree86/modes/xf86EdidModes.c.
+ * From CEA/CTA-861 spec.
*
- * Index using the VIC.
+ * Index with VIC.
*/
-static const struct drm_display_mode edid_cea_modes[] = {
+static const struct drm_display_mode edid_cea_modes_0[] = {
/* 0 - dummy, VICs start at 1 */
{ },
/* 1 - 640x480@60Hz 4:3 */
@@ -3067,6 +3066,25 @@ static u8 *drm_find_cea_extension(const struct edid *edid)
return cea;
}
+static const struct drm_display_mode *cea_mode_for_vic(u8 vic)
+{
+ if (!vic)
+ return NULL;
+ if (vic < ARRAY_SIZE(edid_cea_modes_0))
+ return &edid_cea_modes_0[vic];
+ return NULL;
+}
+
+static u8 cea_num_vics(void)
+{
+ return ARRAY_SIZE(edid_cea_modes_0);
+}
+
+static u8 cea_next_vic(u8 vic)
+{
+ return vic + 1;
Is there any specific reason for adding a new helper function, just to
return vic + 1 ?
+}
+
/*
* Calculate the alternate clock for the CEA mode
* (60Hz vs. 59.94Hz etc.)
@@ -3104,14 +3122,14 @@ cea_mode_alternate_timings(u8 vic, struct drm_display_mode *mode)
* get the other variants by simply increasing the
* vertical front porch length.
*/
- BUILD_BUG_ON(edid_cea_modes[8].vtotal != 262 ||
- edid_cea_modes[9].vtotal != 262 ||
- edid_cea_modes[12].vtotal != 262 ||
- edid_cea_modes[13].vtotal != 262 ||
- edid_cea_modes[23].vtotal != 312 ||
- edid_cea_modes[24].vtotal != 312 ||
- edid_cea_modes[27].vtotal != 312 ||
- edid_cea_modes[28].vtotal != 312);
+ BUILD_BUG_ON(cea_mode_for_vic(8)->vtotal != 262 ||
+ cea_mode_for_vic(9)->vtotal != 262 ||
+ cea_mode_for_vic(12)->vtotal != 262 ||
+ cea_mode_for_vic(13)->vtotal != 262 ||
+ cea_mode_for_vic(23)->vtotal != 312 ||
+ cea_mode_for_vic(24)->vtotal != 312 ||
+ cea_mode_for_vic(27)->vtotal != 312 ||
+ cea_mode_for_vic(28)->vtotal != 312);
if (((vic == 8 || vic == 9 ||
vic == 12 || vic == 13) && mode->vtotal < 263) ||
@@ -3139,10 +3157,16 @@ static u8 drm_match_cea_mode_clock_tolerance(const struct drm_display_mode *to_m
if (to_match->picture_aspect_ratio)
match_flags |= DRM_MODE_MATCH_ASPECT_RATIO;
- for (vic = 1; vic < ARRAY_SIZE(edid_cea_modes); vic++) {
- struct drm_display_mode cea_mode = edid_cea_modes[vic];
+ for (vic = 1; vic < cea_num_vics(); vic = cea_next_vic(vic)) {
+ const struct drm_display_mode *mode = cea_mode_for_vic(vic);
+ struct drm_display_mode cea_mode;
unsigned int clock1, clock2;
+ if (!mode)
+ continue;
+
+ cea_mode = *mode;
+
/* Check both 60Hz and 59.94Hz */
clock1 = cea_mode.clock;
clock2 = cea_mode_alternate_clock(&cea_mode);
@@ -3178,10 +3202,16 @@ u8 drm_match_cea_mode(const struct drm_display_mode *to_match)
if (to_match->picture_aspect_ratio)
match_flags |= DRM_MODE_MATCH_ASPECT_RATIO;
- for (vic = 1; vic < ARRAY_SIZE(edid_cea_modes); vic++) {
- struct drm_display_mode cea_mode = edid_cea_modes[vic];
+ for (vic = 1; vic < cea_num_vics(); vic = cea_next_vic(vic)) {
Again, why not just vic+=1 :) ?
+ const struct drm_display_mode *mode = cea_mode_for_vic(vic);
+ struct drm_display_mode cea_mode;
unsigned int clock1, clock2;
+ if (!mode)
+ continue;
+
+ cea_mode = *mode;
+
/* Check both 60Hz and 59.94Hz */
clock1 = cea_mode.clock;
clock2 = cea_mode_alternate_clock(&cea_mode);
@@ -3202,7 +3232,7 @@ EXPORT_SYMBOL(drm_match_cea_mode);
static bool drm_valid_cea_vic(u8 vic)
{
- return vic > 0 && vic < ARRAY_SIZE(edid_cea_modes);
+ return cea_mode_for_vic(vic) != NULL;
}
/**
@@ -3214,7 +3244,13 @@ static bool drm_valid_cea_vic(u8 vic)
*/
enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code)
{
- return edid_cea_modes[video_code].picture_aspect_ratio;
+ const struct drm_display_mode *mode;
+
+ mode = cea_mode_for_vic(video_code);
+ if (mode)
+ return mode->picture_aspect_ratio;
+
+ return HDMI_PICTURE_ASPECT_NONE;
}
EXPORT_SYMBOL(drm_get_cea_aspect_ratio);
@@ -3323,7 +3359,7 @@ add_alternate_cea_modes(struct drm_connector *connector, struct edid *edid)
unsigned int clock1, clock2;
if (drm_valid_cea_vic(vic)) {
- cea_mode = &edid_cea_modes[vic];
+ cea_mode = cea_mode_for_vic(vic);
clock2 = cea_mode_alternate_clock(cea_mode);
} else {
vic = drm_match_hdmi_mode(mode);
@@ -3398,7 +3434,7 @@ drm_display_mode_from_vic_index(struct drm_connector *connector,
if (!drm_valid_cea_vic(vic))
return NULL;
- newmode = drm_mode_duplicate(dev, &edid_cea_modes[vic]);
+ newmode = drm_mode_duplicate(dev, cea_mode_for_vic(vic));
if (!newmode)
return NULL;
@@ -3432,7 +3468,7 @@ static int do_y420vdb_modes(struct drm_connector *connector,
if (!drm_valid_cea_vic(vic))
continue;
- newmode = drm_mode_duplicate(dev, &edid_cea_modes[vic]);
+ newmode = drm_mode_duplicate(dev, cea_mode_for_vic(vic));
if (!newmode)
break;
bitmap_set(hdmi->y420_vdb_modes, vic, 1);
@@ -4001,7 +4037,7 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode)
vic = drm_match_cea_mode_clock_tolerance(mode, 5);
if (drm_valid_cea_vic(vic)) {
type = "CEA";
- cea_mode = &edid_cea_modes[vic];
+ cea_mode = cea_mode_for_vic(vic);
clock1 = cea_mode->clock;
clock2 = cea_mode_alternate_clock(cea_mode);
} else {
- Shashank
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