Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 65f037e8 authored by Lucas Stach's avatar Lucas Stach
Browse files

drm/etnaviv: add support for slave interface clock 



The slave interface clock is a clock input found on newer cores to gate
the register interface. For now we simply ungate it when the GPU is in
active state.

Signed-off-by: default avatarLucas Stach <l.stach@pengutronix.de>
parent 4df3000e

drivers/gpu/drm/etnaviv/etnaviv_gpu.c

+13 −0
Original line number Diff line number Diff line
@@ -1383,6 +1383,12 @@ static int etnaviv_gpu_clk_enable(struct etnaviv_gpu *gpu) 
{

	int ret;



	if (gpu->clk_reg) {

		ret = clk_prepare_enable(gpu->clk_reg);

		if (ret)

			return ret;

	}



	if (gpu->clk_bus) {

		ret = clk_prepare_enable(gpu->clk_bus);

		if (ret)
@@ -1421,6 +1427,8 @@ static int etnaviv_gpu_clk_disable(struct etnaviv_gpu *gpu) 
		clk_disable_unprepare(gpu->clk_core);

	if (gpu->clk_bus)

		clk_disable_unprepare(gpu->clk_bus);

	if (gpu->clk_reg)

		clk_disable_unprepare(gpu->clk_reg);



	return 0;

}
@@ -1676,6 +1684,11 @@ static int etnaviv_gpu_platform_probe(struct platform_device *pdev) 
	}



	/* Get Clocks: */

	gpu->clk_reg = devm_clk_get(&pdev->dev, "reg");

	DBG("clk_reg: %p", gpu->clk_reg);

	if (IS_ERR(gpu->clk_reg))

		gpu->clk_reg = NULL;



	gpu->clk_bus = devm_clk_get(&pdev->dev, "bus");

	DBG("clk_bus: %p", gpu->clk_bus);

	if (IS_ERR(gpu->clk_bus))

drivers/gpu/drm/etnaviv/etnaviv_gpu.h

+1 −0
Original line number Diff line number Diff line
@@ -147,6 +147,7 @@ struct etnaviv_gpu { 


	/* Power Control: */

	struct clk *clk_bus;

	struct clk *clk_reg;

	struct clk *clk_core;

	struct clk *clk_shader;