This adds a driver for generic vga encoders like the Analog Devices adv7123
and similar ics. These chips do not have any special configuration options
except a powersafe gpio.
An exception is added for the rcar-du driver which also implements support
for the adv7123 internally but is not yet converted to the component framework.
Signed-off-by: Heiko Stuebner
---
drivers/gpu/drm/components/Kconfig | 5 +
drivers/gpu/drm/components/Makefile | 2 +
drivers/gpu/drm/components/vga-encoder.c | 315 +++
3 files changed, 322 insertions(+)
create mode 100644 drivers/gpu/drm/components/vga-encoder.c
diff --git a/drivers/gpu/drm/components/Kconfig
b/drivers/gpu/drm/components/Kconfig
index 9d5d462..647cea6 100644
--- a/drivers/gpu/drm/components/Kconfig
+++ b/drivers/gpu/drm/components/Kconfig
@@ -1,4 +1,9 @@
menu "Standalone components for use with the component framework"
depends on DRM && DRM_KMS_HELPER
+config DRM_COMPONENTS_VGA_ENCODER
+ tristate "Generic vga encoder"
+ help
+ Support for generic vga encoder chips without any special controls.
+
endmenu
diff --git a/drivers/gpu/drm/components/Makefile
b/drivers/gpu/drm/components/Makefile
index be16eca..719b1c9 100644
--- a/drivers/gpu/drm/components/Makefile
+++ b/drivers/gpu/drm/components/Makefile
@@ -1 +1,3 @@
ccflags-y := -Iinclude/drm
+
+obj-$(CONFIG_DRM_COMPONENTS_VGA_ENCODER) += vga-encoder.o
diff --git a/drivers/gpu/drm/components/vga-encoder.c
b/drivers/gpu/drm/components/vga-encoder.c
new file mode 100644
index 000..f559b5e
--- /dev/null
+++ b/drivers/gpu/drm/components/vga-encoder.c
@@ -0,0 +1,315 @@
+/*
+ * Simple vga encoder driver
+ *
+ * Copyright (C) 2014 Heiko Stuebner
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#define encoder_to_vga_encoder(x) container_of(x, struct vga_encoder, encoder)
+
+struct vga_encoder {
+ struct drm_encoder encoder;
+ struct device *dev;
+ struct regulator *vaa_reg;
+ struct gpio_desc *psave_gpio;
+
+ struct mutex enable_lock;
+ bool enabled;
+};
+
+static void vga_encoder_destroy(struct drm_encoder *encoder)
+{
+ drm_encoder_cleanup(encoder);
+}
+
+static const struct drm_encoder_funcs vga_encoder_funcs = {
+ .destroy = vga_encoder_destroy,
+};
+
+static void vga_encoder_dpms(struct drm_encoder *encoder, int mode)
+{
+ struct vga_encoder *vga = encoder_to_vga_encoder(encoder);
+
+ mutex_lock(>enable_lock);
+
+ switch (mode) {
+ case DRM_MODE_DPMS_ON:
+ if (vga->enabled)
+ goto out;
+
+ if (!IS_ERR(vga->vaa_reg))
+ regulator_enable(vga->vaa_reg);
+
+ if (vga->psave_gpio)
+ gpiod_set_value(vga->psave_gpio, 1);
+
+ vga->enabled = true;
+ break;
+ case DRM_MODE_DPMS_STANDBY:
+ case DRM_MODE_DPMS_SUSPEND:
+ case DRM_MODE_DPMS_OFF:
+ if (!vga->enabled)
+ goto out;
+
+ if (vga->psave_gpio)
+ gpiod_set_value(vga->psave_gpio, 0);
+
+ if (!IS_ERR(vga->vaa_reg))
+ regulator_enable(vga->vaa_reg);
+
+ vga->enabled = false;
+ break;
+ default:
+ break;
+ }
+
+out:
+ mutex_unlock(>enable_lock);
+}
+
+static bool vga_encoder_mode_fixup(struct drm_encoder *encoder,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ return true;
+}
+
+static void vga_encoder_prepare(struct drm_encoder *encoder)
+{
+}
+
+static void vga_encoder_mode_set(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+}
+
+static void vga_encoder_commit(struct drm_encoder *encoder)
+{
+ vga_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
+}
+
+static void vga_encoder_disable(struct drm_encoder *encoder)
+{
+ vga_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
+}
+
+static const struct drm_encoder_helper_funcs vga_encoder_helper_funcs = {
+ .dpms = vga_encoder_dpms,
+ .mode_fixup = vga_encoder_mode_fixup,
+ .prepare = vga_encoder_prepare,
+ .mode_set = vga_encoder_mode_set,
+
