Setup a framebuffer using the mailbox driver and register it as
simplefb.
Signed-off-by: Andre Heider <a.heider@xxxxxxxxx>
---
arch/arm/boards/raspberry-pi/rpi.c | 84 ++++++++++++++++++++++++++++++++++++++
1 file changed, 84 insertions(+)
diff --git a/arch/arm/boards/raspberry-pi/rpi.c b/arch/arm/boards/raspberry-pi/rpi.c
index 06c43f3..3e9d62b 100644
--- a/arch/arm/boards/raspberry-pi/rpi.c
+++ b/arch/arm/boards/raspberry-pi/rpi.c
@@ -22,6 +22,7 @@
#include <envfs.h>
#include <asm/armlinux.h>
#include <generated/mach-types.h>
+#include <video/simplefb.h>
#include <mach/core.h>
#include <mach/mbox.h>
@@ -38,6 +39,25 @@ struct msg_get_clock_rate {
u32 end_tag;
};
+struct msg_fb_query {
+ struct bcm2835_mbox_hdr hdr;
+ struct bcm2835_mbox_tag_physical_w_h physical_w_h;
+ u32 end_tag;
+};
+
+struct msg_fb_setup {
+ struct bcm2835_mbox_hdr hdr;
+ struct bcm2835_mbox_tag_physical_w_h physical_w_h;
+ struct bcm2835_mbox_tag_virtual_w_h virtual_w_h;
+ struct bcm2835_mbox_tag_depth depth;
+ struct bcm2835_mbox_tag_pixel_order pixel_order;
+ struct bcm2835_mbox_tag_alpha_mode alpha_mode;
+ struct bcm2835_mbox_tag_virtual_offset virtual_offset;
+ struct bcm2835_mbox_tag_allocate_buffer allocate_buffer;
+ struct bcm2835_mbox_tag_pitch pitch;
+ u32 end_tag;
+};
+
static int rpi_get_arm_mem(u32 *size)
{
BCM2835_MBOX_STACK_ALIGN(struct msg_get_arm_mem, msg);
@@ -79,6 +99,69 @@ static int rpi_register_clkdev(u32 clock_id, const char *name)
return 0;
}
+#ifdef CONFIG_DRIVER_VIDEO_SIMPLEFB
+static int rpi_fb_init(void)
+{
+ BCM2835_MBOX_STACK_ALIGN(struct msg_fb_query, msg_query);
+ BCM2835_MBOX_STACK_ALIGN(struct msg_fb_setup, msg_setup);
+ u32 w, h, stride, fb_address, fb_size;
+ int ret;
+
+ BCM2835_MBOX_INIT_HDR(msg_query);
+ BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h,
+ GET_PHYSICAL_W_H);
+ ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr);
+ if (ret) {
+ printf("could not query display resolution\n");
+ return ret;
+ }
+
+ w = msg_query->physical_w_h.body.resp.width;
+ h = msg_query->physical_w_h.body.resp.height;
+
+ BCM2835_MBOX_INIT_HDR(msg_setup);
+ BCM2835_MBOX_INIT_TAG(&msg_setup->physical_w_h, SET_PHYSICAL_W_H);
+ msg_setup->physical_w_h.body.req.width = w;
+ msg_setup->physical_w_h.body.req.height = h;
+ BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_w_h, SET_VIRTUAL_W_H);
+ msg_setup->virtual_w_h.body.req.width = w;
+ msg_setup->virtual_w_h.body.req.height = h;
+ BCM2835_MBOX_INIT_TAG(&msg_setup->depth, SET_DEPTH);
+ msg_setup->depth.body.req.bpp = 16;
+ BCM2835_MBOX_INIT_TAG(&msg_setup->pixel_order, SET_PIXEL_ORDER);
+ msg_setup->pixel_order.body.req.order = BCM2835_MBOX_PIXEL_ORDER_BGR;
+ BCM2835_MBOX_INIT_TAG(&msg_setup->alpha_mode, SET_ALPHA_MODE);
+ msg_setup->alpha_mode.body.req.alpha = BCM2835_MBOX_ALPHA_MODE_IGNORED;
+ BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_offset, SET_VIRTUAL_OFFSET);
+ msg_setup->virtual_offset.body.req.x = 0;
+ msg_setup->virtual_offset.body.req.y = 0;
+ BCM2835_MBOX_INIT_TAG(&msg_setup->allocate_buffer, ALLOCATE_BUFFER);
+ msg_setup->allocate_buffer.body.req.alignment = 0x100;
+ BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_setup->pitch, GET_PITCH);
+
+ ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_setup->hdr);
+ if (ret) {
+ printf("could not configure display\n");
+ return ret;
+ }
+
+ w = msg_setup->physical_w_h.body.resp.width;
+ h = msg_setup->physical_w_h.body.resp.height;
+ stride = msg_setup->pitch.body.resp.pitch;
+ fb_address = msg_setup->allocate_buffer.body.resp.fb_address;
+ fb_size = msg_setup->allocate_buffer.body.resp.fb_size;
+
+ add_simplefb_device(w, h, stride, SIMPLEFB_R5G6B5, fb_address, fb_size);
+
+ return 0;
+}
+#else
+static inline int rpi_fb_init(void)
+{
+ return -ENODEV;
+}
+#endif
+
static int rpi_mem_init(void)
{
u32 size = 0;
@@ -141,6 +224,7 @@ static int rpi_devices_init(void)
{
armlinux_set_architecture(MACH_TYPE_BCM2708);
armlinux_set_bootparams((void *)(0x00000100));
+ rpi_fb_init();
rpi_env_init();
return 0;
}
--
1.8.3.2
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