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drm/panel: lvds: Simplify mode parsing

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The mode parsing is currently implemented in three steps:
of_get_display_timing() - DT panel-timing to struct display_timing
videomode_from_timing() - struct display_timing to struct videomode
drm_display_mode_from_videomode() - struct videomode to struct drm_display_mode

Replace all that with simple of_get_drm_panel_display_mode() call,
which already populates struct drm_display_mode and then duplicate
that mode in panel_lvds_get_modes() each time, since the mode does
not change.

Nice bonus is the bus_flags parsed by of_get_drm_panel_display_mode()
out of panel-timing DT node, which is used in subsequent patch to fix
handling of 'de-active' DT property.

Tested-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dmitry Osipenko <digetx@gmail.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
To: dri-devel@lists.freedesktop.org
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220401162154.295152-1-marex@denx.de
This commit is contained in:
Marek Vasut 2022-04-01 18:21:53 +02:00
parent fb47723aba
commit 03fa454bb6
1 changed files with 9 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/gpu/drm/panel/panel-lvds.c
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@ -30,7 +30,8 @@ struct panel_lvds {
const char *label;
unsigned int width;
unsigned int height;
struct videomode video_mode;
struct drm_display_mode dmode;
u32 bus_flags;
unsigned int bus_format;
bool data_mirror;
@ -87,16 +88,15 @@ static int panel_lvds_get_modes(struct drm_panel *panel,
struct panel_lvds *lvds = to_panel_lvds(panel);
struct drm_display_mode *mode;
mode = drm_mode_create(connector->dev);
mode = drm_mode_duplicate(connector->dev, &lvds->dmode);
if (!mode)
return 0;
drm_display_mode_from_videomode(&lvds->video_mode, mode);
mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);
connector->display_info.width_mm = lvds->width;
connector->display_info.height_mm = lvds->height;
connector->display_info.width_mm = lvds->dmode.width_mm;
connector->display_info.height_mm = lvds->dmode.height_mm;
drm_display_info_set_bus_formats(&connector->display_info,
&lvds->bus_format, 1);
connector->display_info.bus_flags = lvds->data_mirror
@ -116,7 +116,6 @@ static const struct drm_panel_funcs panel_lvds_funcs = {
static int panel_lvds_parse_dt(struct panel_lvds *lvds)
{
struct device_node *np = lvds->dev->of_node;
struct display_timing timing;
int ret;
ret = of_drm_get_panel_orientation(np, &lvds->orientation);
@ -125,23 +124,20 @@ static int panel_lvds_parse_dt(struct panel_lvds *lvds)
return ret;
}
ret = of_get_display_timing(np, "panel-timing", &timing);
ret = of_get_drm_panel_display_mode(np, &lvds->dmode, &lvds->bus_flags);
if (ret < 0) {
dev_err(lvds->dev, "%pOF: problems parsing panel-timing (%d)\n",
np, ret);
return ret;
}
videomode_from_timing(&timing, &lvds->video_mode);
ret = of_property_read_u32(np, "width-mm", &lvds->width);
if (ret < 0) {
if (lvds->dmode.width_mm == 0) {
dev_err(lvds->dev, "%pOF: invalid or missing %s DT property\n",
np, "width-mm");
return -ENODEV;
}
ret = of_property_read_u32(np, "height-mm", &lvds->height);
if (ret < 0) {
if (lvds->dmode.height_mm == 0) {
dev_err(lvds->dev, "%pOF: invalid or missing %s DT property\n",
np, "height-mm");
return -ENODEV;