Hi Simon,
On 15/03/23 19:38, Simon Glass wrote:
Hi Nikhil,
On Wed, 15 Mar 2023 at 00:07, Nikhil M Jain <n-ja...@ti.com> wrote:
Hi Simon,
On 15/03/23 03:38, Simon Glass wrote:
Hi Nikhil,
On Mon, 13 Mar 2023 at 04:15, Nikhil M Jain <n-ja...@ti.com> wrote:
To enable splash screen at SPL stage move video driver and splash screen
framework at SPL, which will bring up image on display very quickly and
thus have early display support in SPL.
Nikhil M Jain (9):
drivers: video: Kconfig: Necessary configs for video at SPL
drivers: video: tidss: Kconfig: Configs to enable TIDSS at SPL
cmd: Kconfig: Add necessary configs for splash screen at SPL
drivers: video: Makefile: Compile video driver files at SPL
drivers: video: tidss: Makefile: Add condition to compile TIDSS at SPL
cmd: Makefile: Add rules to build bmp.c and read.c at SPL
common: splash: Enable splash_display at SPL stage
drivers: video: video-uclass: Disable u-boot logo at SPL
board: ti: am62x: evm: OSPI support for splash screen
board/ti/am62x/evm.c | 6 ++++++
cmd/Kconfig | 17 +++++++++++++++++
cmd/Makefile | 2 ++
common/splash.c | 2 +-
drivers/video/Kconfig | 32 ++++++++++++++++++++++++++++----
drivers/video/Makefile | 6 ++++++
drivers/video/tidss/Kconfig | 6 ++++++
drivers/video/tidss/Makefile | 1 +
drivers/video/video-uclass.c | 2 +-
include/splash.h | 2 +-
10 files changed, 69 insertions(+), 7 deletions(-)
I'm not necessarily arguing against this, but what is the need for
this? How many milliseconds earlier does the image appear with this
patch? What is the bottleneck? We should be able to get to U-Boot
proper very quickly.
There is a significant difference in time, by adding support in SPL
splash screen comes up by approx 650ms and at u-boot proper it comes at
2.6s, measured from first print in console as seen on AM62x. Also we
plan to skip u-boot proper and load kernel directly.
Yes that really is terrible. It should be under a second for U-Boot proper!
Have you tried using bootstage to report the numbers?
No I haven't used the bootstage, I will use it to get the numbers.
Have you tried using tracing to figure out what is wrong? Is it just
slow storage?
U-boot proper comes up in one sec but the splash display is called
through stdio_add_devices which is late in the board_init_r sequence
defined in board_r.c.
Regards,
Simon
Thanks
