#include <linux/component.h>
#include <linux/list.h>
+#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/reset.h>
#include "sun4i_layer.h"
#include "sunxi_engine.h"
+struct sun4i_backend_quirks {
+ /* backend <-> TCON muxing selection done in backend */
+ bool needs_output_muxing;
+};
+
static const u32 sunxi_rgb2yuv_coef[12] = {
0x00000107, 0x00000204, 0x00000064, 0x00000108,
0x00003f69, 0x00003ed6, 0x000001c1, 0x00000808,
struct drm_device *drm = data;
struct sun4i_drv *drv = drm->dev_private;
struct sun4i_backend *backend;
+ const struct sun4i_backend_quirks *quirks;
struct resource *res;
void __iomem *regs;
int i, ret;
SUN4I_BACKEND_MODCTL_DEBE_EN |
SUN4I_BACKEND_MODCTL_START_CTL);
+ /* Set output selection if needed */
+ quirks = of_device_get_match_data(dev);
+ if (quirks->needs_output_muxing) {
+ /*
+ * We assume there is no dynamic muxing of backends
+ * and TCONs, so we select the backend with same ID.
+ *
+ * While dynamic selection might be interesting, since
+ * the CRTC is tied to the TCON, while the layers are
+ * tied to the backends, this means, we will need to
+ * switch between groups of layers. There might not be
+ * a way to represent this constraint in DRM.
+ */
+ regmap_update_bits(backend->engine.regs,
+ SUN4I_BACKEND_MODCTL_REG,
+ SUN4I_BACKEND_MODCTL_OUT_SEL,
+ (backend->engine.id
+ ? SUN4I_BACKEND_MODCTL_OUT_LCD1
+ : SUN4I_BACKEND_MODCTL_OUT_LCD0));
+ }
+
return 0;
err_disable_ram_clk:
return 0;
}
+static const struct sun4i_backend_quirks sun5i_backend_quirks = {
+};
+
+static const struct sun4i_backend_quirks sun6i_backend_quirks = {
+};
+
+static const struct sun4i_backend_quirks sun8i_a33_backend_quirks = {
+};
+
static const struct of_device_id sun4i_backend_of_table[] = {
- { .compatible = "allwinner,sun5i-a13-display-backend" },
- { .compatible = "allwinner,sun6i-a31-display-backend" },
- { .compatible = "allwinner,sun8i-a33-display-backend" },
+ {
+ .compatible = "allwinner,sun5i-a13-display-backend",
+ .data = &sun5i_backend_quirks,
+ },
+ {
+ .compatible = "allwinner,sun6i-a31-display-backend",
+ .data = &sun6i_backend_quirks,
+ },
+ {
+ .compatible = "allwinner,sun8i-a33-display-backend",
+ .data = &sun8i_a33_backend_quirks,
+ },
{ }
};
MODULE_DEVICE_TABLE(of, sun4i_backend_of_table);