On 4/4/23 09:37, Luca Ceresoli wrote:
[...]
@@ -177,28 +183,25 @@ static void fsl_ldb_atomic_enable(struct drm_bridge
*bridge,
clk_prepare_enable(fsl_ldb->clk);
/* Program LDB_CTRL */
- reg = LDB_CTRL_CH0_ENABLE;
-
- if (fsl_ldb->lvds_dual_link)
- reg |= LDB_CTRL_CH1_ENABLE | LDB_CTRL_SPLIT_MODE;
-
- if (lvds_format_24bpp) {
- reg |= LDB_CTRL_CH0_DATA_WIDTH;
- if (fsl_ldb->lvds_dual_link)
- reg |= LDB_CTRL_CH1_DATA_WIDTH;
- }
-
- if (lvds_format_jeida) {
- reg |= LDB_CTRL_CH0_BIT_MAPPING;
- if (fsl_ldb->lvds_dual_link)
- reg |= LDB_CTRL_CH1_BIT_MAPPING;
- }
-
- if (mode->flags & DRM_MODE_FLAG_PVSYNC) {
- reg |= LDB_CTRL_DI0_VSYNC_POLARITY;
- if (fsl_ldb->lvds_dual_link)
- reg |= LDB_CTRL_DI1_VSYNC_POLARITY;
- }
+ reg =
Cosmetic nit, do we need the newline here , can't we just move the first
'(fsl_ldb->ch0_enabled ? LDB_CTRL_CH0_ENABLE : 0) |' on the same line as
'reg =' ? It might need a bit of indent with spaces, but that should be OK.
+ (fsl_ldb->ch0_enabled ? LDB_CTRL_CH0_ENABLE : 0) |
+ (fsl_ldb->ch1_enabled ? LDB_CTRL_CH1_ENABLE : 0) |
+ (fsl_ldb_is_dual(fsl_ldb) ? LDB_CTRL_SPLIT_MODE : 0);
+
+ if (lvds_format_24bpp)
+ reg |=
+ (fsl_ldb->ch0_enabled ? LDB_CTRL_CH0_DATA_WIDTH : 0) |
+ (fsl_ldb->ch1_enabled ? LDB_CTRL_CH1_DATA_WIDTH : 0);
+
+ if (lvds_format_jeida)
+ reg |=
+ (fsl_ldb->ch0_enabled ? LDB_CTRL_CH0_BIT_MAPPING : 0) |
+ (fsl_ldb->ch1_enabled ? LDB_CTRL_CH1_BIT_MAPPING : 0);
+
+ if (mode->flags & DRM_MODE_FLAG_PVSYNC)
+ reg |=
+ (fsl_ldb->ch0_enabled ? LDB_CTRL_DI0_VSYNC_POLARITY :
0) |
+ (fsl_ldb->ch1_enabled ? LDB_CTRL_DI1_VSYNC_POLARITY :
0);
regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->ldb_ctrl, reg);
[...]
@@ -311,10 +314,23 @@ static int fsl_ldb_probe(struct platform_device *pdev)
if (IS_ERR(fsl_ldb->regmap))
return PTR_ERR(fsl_ldb->regmap);
- /* Locate the panel DT node. */
- panel_node = of_graph_get_remote_node(dev->of_node, 1, 0);
- if (!panel_node)
- return -ENXIO;
+ /* Locate the remote ports and the panel node */
+ remote1 = of_graph_get_remote_node(dev->of_node, 1, 0);
+ remote2 = of_graph_get_remote_node(dev->of_node, 2, 0);
+ fsl_ldb->ch0_enabled = (remote1 != NULL);
+ fsl_ldb->ch1_enabled = (remote2 != NULL);
+ panel_node = of_node_get(remote1 ? remote1 : remote2);
You can even do this without the middle 'remote1' I think:
panel_node = of_node_get(remote1 ? : remote2);
+ of_node_put(remote1);
+ of_node_put(remote2);
+
+ if (!fsl_ldb->ch0_enabled && !fsl_ldb->ch1_enabled) {
+ of_node_put(panel_node);
+ return dev_err_probe(dev, -ENXIO, "No panel node found");
+ }
+
+ dev_dbg(dev, "Using %s\n",
+ fsl_ldb_is_dual(fsl_ldb) ? "dual mode" :
I think this is called "dual-link mode" , maybe update the string .
+ fsl_ldb->ch0_enabled ? "channel 0" : "channel 1");
panel = of_drm_find_panel(panel_node);
of_node_put(panel_node);
@@ -325,20 +341,26 @@ static int fsl_ldb_probe(struct platform_device *pdev)
if (IS_ERR(fsl_ldb->panel_bridge))
return PTR_ERR(fsl_ldb->panel_bridge);
- /* Determine whether this is dual-link configuration */
- port1 = of_graph_get_port_by_id(dev->of_node, 1);
- port2 = of_graph_get_port_by_id(dev->of_node, 2);
- dual_link = drm_of_lvds_get_dual_link_pixel_order(port1, port2);
- of_node_put(port1);
- of_node_put(port2);
- if (dual_link == DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS) {
- dev_err(dev, "LVDS channel pixel swap not supported.\n");
- return -EINVAL;
- }
+ if (fsl_ldb_is_dual(fsl_ldb)) {
+ struct device_node *port1, *port2;
+
+ port1 = of_graph_get_port_by_id(dev->of_node, 1);
+ port2 = of_graph_get_port_by_id(dev->of_node, 2);
+ dual_link = drm_of_lvds_get_dual_link_pixel_order(port1, port2);
+ of_node_put(port1);
+ of_node_put(port2);
- if (dual_link == DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS)
- fsl_ldb->lvds_dual_link = true;
+ if (dual_link < 0)
+ return dev_err_probe(dev, dual_link,
+ "Error getting dual link
configuration");
Does this need a trailing '\n' in the formatting string or not ? I think
yes.
The rest looks good, with the few details fixed:
Reviewed-by: Marek Vasut <[email protected]>
