[PATCH] SPARC64: use serial console when QEMU is launched with -vga none

[Mark Cave-Ayland]

If no display device has been installed in the DT e.g. passing -vga none into
the QEMU command line then fall back to using the serial console as already
occurs when launching QEMU in -nographic mode.

Signed-off-by: Mark Cave-Ayland 
---
 arch/sparc64/openbios.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/arch/sparc64/openbios.c b/arch/sparc64/openbios.c
index a783c1f..e2f7e59 100644
--- a/arch/sparc64/openbios.c
+++ b/arch/sparc64/openbios.c
@@ -537,10 +537,11 @@ void arch_nvram_get(char *data)
     uint32_t temp;
     uint64_t ram_size;
     uint32_t clock_frequency;
-    uint16_t machine_id;
+    uint16_t machine_id, nographic;
     const char *stdin_path, *stdout_path;
     char *bootorder_file, *boot_path;
     uint32_t bootorder_sz, sz;
+    phandle_t display_ph;

fw_cfg_init();

@@ -701,7 +702,15 @@ void arch_nvram_get(char *data)
     push_str("/chosen");
     fword("find-device");

-    if (fw_cfg_read_i16(FW_CFG_NOGRAPHIC)) {
+    nographic = fw_cfg_read_i16(FW_CFG_NOGRAPHIC);
+
+    /* Check to see if any framebuffer present */
+    display_ph = dt_iterate_type(0, "display");
+    if (display_ph == 0) {
+        nographic = 1;
+    }
+
+    if (nographic) {
         stdin_path = stdout_path = "ttya";
     } else {
         stdin_path = "keyboard";

[Mark Cave-Ayland]

On 23/06/2019 15:00, Mark Cave-Ayland wrote:
> If no display device has been installed in the DT e.g. passing -vga none into
> the QEMU command line then fall back to using the serial console as already
> occurs when launching QEMU in -nographic mode.
> Signed-off-by: Mark Cave-Ayland
>
> arch/sparc64/openbios.c | 13 +++++++++++--
>  1 file changed, 11 insertions(+), 2 deletions(-)
>
> diff --git a/arch/sparc64/openbios.c b/arch/sparc64/openbios.c
> index a783c1f..e2f7e59 100644
> --- a/arch/sparc64/openbios.c
> +++ b/arch/sparc64/openbios.c
> @@ -537,10 +537,11 @@ void arch_nvram_get(char *data)
>      uint32_t temp;
>      uint64_t ram_size;
>      uint32_t clock_frequency;
> uint16_t machine_id;
>
> uint16_t machine_id, nographic;
> const char *stdin_path, *stdout_path;
> char *bootorder_file, *boot_path;
> uint32_t bootorder_sz, sz;
>
> phandle_t display_ph;
>
> fw_cfg_init();
>
> @@ -701,7 +702,15 @@ void arch_nvram_get(char *data)
>      push_str("/chosen");
>      fword("find-device");
> if (fw_cfg_read_i16(FW_CFG_NOGRAPHIC)) {
> nographic = fw_cfg_read_i16(FW_CFG_NOGRAPHIC);
> /* Check to see if any framebuffer present */
> display_ph = dt_iterate_type(0, "display");
> if (display_ph == 0) {
>    nographic = 1;
> }
> if (nographic) {
>     stdin_path = stdout_path = "ttya";
> } else {
>     stdin_path = "keyboard";

Pushed to master.

ATB,

Mark.