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drm/panel-edp: Add override_edid_mode quirk for generic edp

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[ Upstream commit 9f7843b515811aea6c56527eb195b622e9c01f12 ]

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>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231117215056.1883314-2-hsinyi@chromium.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hsin-Yi Wang 2023-11-17 13:46:32 -08:00 committed by Greg Kroah-Hartman
parent 055c849724
commit 3c2bd20dc9
1 changed files with 45 additions and 3 deletions
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48
drivers/gpu/drm/panel/panel-edp.c
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@ -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);
@ -1861,6 +1894,15 @@ static const struct panel_delay delay_200_500_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