[PATCH v3 2/4] clk: bcm: rpi: Mark PIXEL_CLK and HEVC_CLK as CLK_IGNORE_UNUSED

[Melissa Wen]

On 16/01/2026 17:19, Maíra Canal wrote:
> If PIXEL_CLK or HEVC_CLK is disabled during boot, the firmware will skip
> HSM initialization, which would result in a bus lockup. However, those
> clocks are consumed by drivers (vc4 and HEVC decoder drivers,
> respectively), which means that they can be enabled/disabled by the
> drivers.
>
> Mark those clocks as CLK_IGNORE_UNUSED to allow them to be disabled by
> drivers when appropriate.
Acked-by: Melissa Wen <mwen at igalia.com>

But it'd be better if Stefan or Dave could check if we're missing 
anything in the firmware perspective.
>
> Signed-off-by: Maíra Canal <mcanal at igalia.com>
> ---
>   drivers/clk/bcm/clk-raspberrypi.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c
> index 9783385d5859836898683209e320fcc928dfdc71..41f058bf44e8a5257e4b2a90389b5e9525f2fffb 100644
> --- a/drivers/clk/bcm/clk-raspberrypi.c
> +++ b/drivers/clk/bcm/clk-raspberrypi.c
> @@ -139,12 +139,12 @@ raspberrypi_clk_variants[RPI_FIRMWARE_NUM_CLK_ID] = {
>   	[RPI_FIRMWARE_PIXEL_CLK_ID] = {
>   		.export = true,
>   		.minimize = true,
> -		.flags = CLK_IS_CRITICAL,
> +		.flags = CLK_IGNORE_UNUSED,
>   	},
>   	[RPI_FIRMWARE_HEVC_CLK_ID] = {
>   		.export = true,
>   		.minimize = true,
> -		.flags = CLK_IS_CRITICAL,
> +		.flags = CLK_IGNORE_UNUSED,
>   	},
>   	[RPI_FIRMWARE_ISP_CLK_ID] = {
>   		.export = true,
>