* [PATCH v7 1/3] drm/panel-edp: Add override_edid_mode quirk for generic edp
2023-11-17 21:46 [PATCH v7 0/3] Use correct mode for edp panel Hsin-Yi Wang
@ 2023-11-17 21:46 ` Hsin-Yi Wang
2023-11-17 22:06 ` Greg KH
2023-11-17 21:46 ` [PATCH v7 2/3] drm/panel-edp: Add auo_b116xa3_mode Hsin-Yi Wang
2023-11-17 21:46 ` [PATCH v7 3/3] drm/panel-edp: Avoid adding multiple preferred modes Hsin-Yi Wang
2 siblings, 1 reply; 6+ messages in thread
From: Hsin-Yi Wang @ 2023-11-17 21:46 UTC (permalink / raw)
To: Douglas Anderson
Cc: Neil Armstrong, Jessica Zhang, Sam Ravnborg, Maarten Lankhorst,
Maxime Ripard, Thomas Zimmermann, David Airlie, Daniel Vetter,
dri-devel, linux-kernel, stable
Generic edp gets mode from edid. However, some panels report incorrect
mode in this way, resulting in glitches on panel. Introduce a new quirk
additional_mode to the generic edid to pick a correct hardcoded mode.
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
---
v6->v7: split usecase to another patch.
---
drivers/gpu/drm/panel/panel-edp.c | 48 +++++++++++++++++++++++++++++--
1 file changed, 45 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index f22677373171..33535f6de343 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -203,6 +203,9 @@ struct edp_panel_entry {
/** @name: Name of this panel (for printing to logs). */
const char *name;
+
+ /** @override_edid_mode: Override the mode obtained by edid. */
+ const struct drm_display_mode *override_edid_mode;
};
struct panel_edp {
@@ -301,6 +304,24 @@ static unsigned int panel_edp_get_display_modes(struct panel_edp *panel,
return num;
}
+static int panel_edp_override_edid_mode(struct panel_edp *panel,
+ struct drm_connector *connector,
+ const struct drm_display_mode *override_mode)
+{
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_duplicate(connector->dev, override_mode);
+ if (!mode) {
+ dev_err(panel->base.dev, "failed to add additional mode\n");
+ return 0;
+ }
+
+ mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+ drm_mode_set_name(mode);
+ drm_mode_probed_add(connector, mode);
+ return 1;
+}
+
static int panel_edp_get_non_edid_modes(struct panel_edp *panel,
struct drm_connector *connector)
{
@@ -568,6 +589,9 @@ static int panel_edp_get_modes(struct drm_panel *panel,
{
struct panel_edp *p = to_panel_edp(panel);
int num = 0;
+ bool has_override_edid_mode = p->detected_panel &&
+ p->detected_panel != ERR_PTR(-EINVAL) &&
+ p->detected_panel->override_edid_mode;
/* probe EDID if a DDC bus is available */
if (p->ddc) {
@@ -575,9 +599,18 @@ static int panel_edp_get_modes(struct drm_panel *panel,
if (!p->edid)
p->edid = drm_get_edid(connector, p->ddc);
-
- if (p->edid)
- num += drm_add_edid_modes(connector, p->edid);
+ if (p->edid) {
+ if (has_override_edid_mode) {
+ /*
+ * override_edid_mode is specified. Use
+ * override_edid_mode instead of from edid.
+ */
+ num += panel_edp_override_edid_mode(p, connector,
+ p->detected_panel->override_edid_mode);
+ } else {
+ num += drm_add_edid_modes(connector, p->edid);
+ }
+ }
pm_runtime_mark_last_busy(panel->dev);
pm_runtime_put_autosuspend(panel->dev);
@@ -1849,6 +1882,15 @@ static const struct panel_delay delay_200_150_e200 = {
.delay = _delay \
}
+#define EDP_PANEL_ENTRY2(vend_chr_0, vend_chr_1, vend_chr_2, product_id, _delay, _name, _mode) \
+{ \
+ .name = _name, \
+ .panel_id = drm_edid_encode_panel_id(vend_chr_0, vend_chr_1, vend_chr_2, \
+ product_id), \
+ .delay = _delay, \
+ .override_edid_mode = _mode \
+}
+
/*
* This table is used to figure out power sequencing delays for panels that
* are detected by EDID. Entries here may point to entries in the
--
2.43.0.rc0.421.g78406f8d94-goog
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH v7 2/3] drm/panel-edp: Add auo_b116xa3_mode
2023-11-17 21:46 [PATCH v7 0/3] Use correct mode for edp panel Hsin-Yi Wang
2023-11-17 21:46 ` [PATCH v7 1/3] drm/panel-edp: Add override_edid_mode quirk for generic edp Hsin-Yi Wang
@ 2023-11-17 21:46 ` Hsin-Yi Wang
2023-11-17 21:52 ` kernel test robot
2023-11-17 21:46 ` [PATCH v7 3/3] drm/panel-edp: Avoid adding multiple preferred modes Hsin-Yi Wang
2 siblings, 1 reply; 6+ messages in thread
From: Hsin-Yi Wang @ 2023-11-17 21:46 UTC (permalink / raw)
To: Douglas Anderson
Cc: Neil Armstrong, Jessica Zhang, Sam Ravnborg, Maarten Lankhorst,
Maxime Ripard, Thomas Zimmermann, David Airlie, Daniel Vetter,
dri-devel, linux-kernel, stable
Add auo_b116xa3_mode to override the original modes parsed from edid
of the panels 0x405c B116XAK01.0 and 0x615c B116XAN06.1 which result
in glitches on panel.
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
---
v6->v7: split usecase to another patch.
---
drivers/gpu/drm/panel/panel-edp.c | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index 33535f6de343..3e144145a6bd 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -983,6 +983,19 @@ static const struct panel_desc auo_b101ean01 = {
},
};
+static const struct drm_display_mode auo_b116xa3_mode = {
+ .clock = 70589,
+ .hdisplay = 1366,
+ .hsync_start = 1366 + 40,
+ .hsync_end = 1366 + 40 + 40,
+ .htotal = 1366 + 40 + 40 + 32,
+ .vdisplay = 768,
+ .vsync_start = 768 + 10,
+ .vsync_end = 768 + 10 + 12,
+ .vtotal = 768 + 10 + 12 + 6,
+ .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
+};
+
static const struct drm_display_mode auo_b116xak01_mode = {
.clock = 69300,
.hdisplay = 1366,
@@ -1908,9 +1921,11 @@ static const struct edp_panel_entry edp_panels[] = {
EDP_PANEL_ENTRY('A', 'U', 'O', 0x239b, &delay_200_500_e50, "B116XAN06.1"),
EDP_PANEL_ENTRY('A', 'U', 'O', 0x255c, &delay_200_500_e50, "B116XTN02.5"),
EDP_PANEL_ENTRY('A', 'U', 'O', 0x403d, &delay_200_500_e50, "B140HAN04.0"),
- EDP_PANEL_ENTRY('A', 'U', 'O', 0x405c, &auo_b116xak01.delay, "B116XAK01.0"),
+ EDP_PANEL_ENTRY2('A', 'U', 'O', 0x405c, &auo_b116xak01.delay, "B116XAK01.0",
+ &auo_b116xa3_mode),
EDP_PANEL_ENTRY('A', 'U', 'O', 0x582d, &delay_200_500_e50, "B133UAN01.0"),
- EDP_PANEL_ENTRY('A', 'U', 'O', 0x615c, &delay_200_500_e50, "B116XAN06.1"),
+ EDP_PANEL_ENTRY2('A', 'U', 'O', 0x615c, &delay_200_500_e50, "B116XAN06.1",
+ &auo_b116xa3_mode),
EDP_PANEL_ENTRY('A', 'U', 'O', 0x635c, &delay_200_500_e50, "B116XAN06.3"),
EDP_PANEL_ENTRY('A', 'U', 'O', 0x639c, &delay_200_500_e50, "B140HAK02.7"),
EDP_PANEL_ENTRY('A', 'U', 'O', 0x8594, &delay_200_500_e50, "B133UAN01.0"),
--
2.43.0.rc0.421.g78406f8d94-goog
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH v7 3/3] drm/panel-edp: Avoid adding multiple preferred modes
2023-11-17 21:46 [PATCH v7 0/3] Use correct mode for edp panel Hsin-Yi Wang
2023-11-17 21:46 ` [PATCH v7 1/3] drm/panel-edp: Add override_edid_mode quirk for generic edp Hsin-Yi Wang
2023-11-17 21:46 ` [PATCH v7 2/3] drm/panel-edp: Add auo_b116xa3_mode Hsin-Yi Wang
@ 2023-11-17 21:46 ` Hsin-Yi Wang
2 siblings, 0 replies; 6+ messages in thread
From: Hsin-Yi Wang @ 2023-11-17 21:46 UTC (permalink / raw)
To: Douglas Anderson
Cc: Neil Armstrong, Jessica Zhang, Sam Ravnborg, Maarten Lankhorst,
Maxime Ripard, Thomas Zimmermann, David Airlie, Daniel Vetter,
dri-devel, linux-kernel, stable
If a non generic edp-panel is under aux-bus, the mode read from edid would
still be selected as preferred and results in multiple preferred modes,
which is ambiguous.
If both hard-coded mode and edid exists, only add mode from hard-coded.
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
---
v6->v7: no change
---
drivers/gpu/drm/panel/panel-edp.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index 3e144145a6bd..825fa2a0d8a5 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -589,6 +589,7 @@ static int panel_edp_get_modes(struct drm_panel *panel,
{
struct panel_edp *p = to_panel_edp(panel);
int num = 0;
+ bool has_hard_coded_modes = p->desc->num_timings || p->desc->num_modes;
bool has_override_edid_mode = p->detected_panel &&
p->detected_panel != ERR_PTR(-EINVAL) &&
p->detected_panel->override_edid_mode;
@@ -599,7 +600,11 @@ static int panel_edp_get_modes(struct drm_panel *panel,
if (!p->edid)
p->edid = drm_get_edid(connector, p->ddc);
- if (p->edid) {
+ /*
+ * If both edid and hard-coded modes exists, skip edid modes to
+ * avoid multiple preferred modes.
+ */
+ if (p->edid && !has_hard_coded_modes) {
if (has_override_edid_mode) {
/*
* override_edid_mode is specified. Use
@@ -616,12 +621,7 @@ static int panel_edp_get_modes(struct drm_panel *panel,
pm_runtime_put_autosuspend(panel->dev);
}
- /*
- * Add hard-coded panel modes. Don't call this if there are no timings
- * and no modes (the generic edp-panel case) because it will clobber
- * the display_info that was already set by drm_add_edid_modes().
- */
- if (p->desc->num_timings || p->desc->num_modes)
+ if (has_hard_coded_modes)
num += panel_edp_get_non_edid_modes(p, connector);
else if (!num)
dev_warn(p->base.dev, "No display modes\n");
--
2.43.0.rc0.421.g78406f8d94-goog
^ permalink raw reply related [flat|nested] 6+ messages in thread