drm/panel: simple: add support for EDT ET0350 3.5" QVGA panel

[karo-tx-linux.git] / drivers / gpu / drm / panel / panel-simple.c

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index f356a7b32f08db68af20c542e251653d91725404..f57b463b06e9045bd5cbcd99c047abf7d7d834bd 100644 (file)
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -89,6 +89,12 @@ struct panel_simple {
        struct gpio_desc *enable_gpio;
 
        u32 bus_fmt_override;
+       u32 quirks;
+};
+
+enum {
+       PANEL_QUIRK_PIXDATA_NEGEDGE = BIT(0),
+       PANEL_QUIRK_PIXDATA_POSEDGE = BIT(1),
 };
 
 #define SP_DISPLAY_MODE(freq, ha, hfp, hs, hbp, va, vfp, vs, vbp, vr, flgs) { \
@@ -110,6 +116,15 @@ static inline struct panel_simple *to_panel_simple(struct drm_panel *panel)
        return container_of(panel, struct panel_simple, base);
 }
 
+static inline void panel_simple_apply_quirks(struct panel_simple *panel,
+                                            struct drm_display_info *info)
+{
+       if (panel->quirks & PANEL_QUIRK_PIXDATA_NEGEDGE)
+               info->bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE;
+       if (panel->quirks & PANEL_QUIRK_PIXDATA_POSEDGE)
+               info->bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE;
+}
+
 static int panel_simple_get_fixed_modes(struct panel_simple *panel)
 {
        struct drm_connector *connector = panel->base.connector;
@@ -175,6 +190,8 @@ static int panel_simple_get_fixed_modes(struct panel_simple *panel)
                drm_display_info_set_bus_formats(&connector->display_info,
                                                 &panel->desc->bus_format, 1);
        connector->display_info.bus_flags = panel->desc->bus_flags;
+       if (panel->quirks)
+               panel_simple_apply_quirks(panel, &connector->display_info);
 
        return num;
 }
@@ -308,6 +325,7 @@ static inline int panel_simple_check_quirks(struct device *dev,
                                            struct panel_simple *p)
 {
        const char *bus_fmt;
+       u32 clkpol;
 
        if (of_property_read_string(dev->of_node, "bus-format-override",
                                    &bus_fmt) == 0) {
@@ -329,6 +347,18 @@ static inline int panel_simple_check_quirks(struct device *dev,
                                bus_fmt);
                return p->bus_fmt_override ? 0 : -EINVAL;
        }
+
+       if (of_property_read_u32(dev->of_node, "pixelclk-active",
+                                &clkpol) == 0) {
+               if (clkpol & ~1) {
+                       dev_err(dev,
+                               "Invalid value for pixelclk-active: '%u' (should be <0> or <1>)\n",
+                               clkpol);
+                       return -EINVAL;
+               }
+               p->quirks |= clkpol ? PANEL_QUIRK_PIXDATA_POSEDGE :
+                       PANEL_QUIRK_PIXDATA_NEGEDGE;
+       }
        return 0;
 }
 
@@ -733,6 +763,22 @@ static const struct panel_desc chunghwa_claa101wb01 = {
        },
 };
 
+static const struct drm_display_mode edt_et0350g0dh6_mode =
+       SP_DISPLAY_MODE(6500, 320, 20, 0, 68, 240, 4, 0, 18, 60,
+                       DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC);
+
+static const struct panel_desc edt_et0350g0dh6 = {
+       .modes = &edt_et0350g0dh6_mode,
+       .num_modes = 1,
+       .bpc = 6,
+       .size = {
+               .width = 70,
+               .height = 53,
+       },
+       .bus_format = MEDIA_BUS_FMT_RGB666_1X18,
+       .bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_NEGEDGE,
+};
+
 static const struct drm_display_mode edt_et057090dhu_mode =
        SP_DISPLAY_MODE(25175, 640, 16, 30, 114, 480, 10, 3, 32, 60,
                        DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC);
@@ -1560,6 +1606,9 @@ static const struct of_device_id platform_of_match[] = {
        }, {
                .compatible = "chunghwa,claa101wb01",
                .data = &chunghwa_claa101wb01
+       }, {
+               .compatible = "edt,et0350g0dh6",
+               .data = &edt_et0350g0dh6,
        }, {
                .compatible = "edt,et057090dhu",
                .data = &edt_et057090dhu,