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drm/etnaviv: fold various clock enable/disable functions into top ones 

The driver doesn't ever enable individual clocks alone, so there
is no need to scatter the clock enable/disable sequences through
multiple functions. Fold them into the top one.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
This commit is contained in:
Lucas Stach 2016-08-22 15:26:19 +02:00
parent dc227890d2
commit 9c7310c05d
1 changed files with 30 additions and 73 deletions
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103
drivers/gpu/drm/etnaviv/etnaviv_gpu.c
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@ -867,63 +867,6 @@ int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m)
}
#endif
/*
* Power Management:
*/
static int enable_clk(struct etnaviv_gpu *gpu)
{
int ret;
if (gpu->clk_core) {
ret = clk_prepare_enable(gpu->clk_core);
if (ret)
return ret;
}
if (gpu->clk_shader) {
ret = clk_prepare_enable(gpu->clk_shader);
if (ret)
goto disable_clk_core;
}
return 0;
disable_clk_core:
clk_disable_unprepare(gpu->clk_core);
return ret;
}
static int disable_clk(struct etnaviv_gpu *gpu)
{
if (gpu->clk_core)
clk_disable_unprepare(gpu->clk_core);
if (gpu->clk_shader)
clk_disable_unprepare(gpu->clk_shader);
return 0;
}
static int enable_axi(struct etnaviv_gpu *gpu)
{
int ret;
if (gpu->clk_bus) {
ret = clk_prepare_enable(gpu->clk_bus);
if (ret)
return ret;
}
return 0;
}
static int disable_axi(struct etnaviv_gpu *gpu)
{
if (gpu->clk_bus)
clk_disable_unprepare(gpu->clk_bus);
return 0;
}
/*
* Hangcheck detection for locked gpu:
*/
@ -1484,30 +1427,44 @@ static int etnaviv_gpu_clk_enable(struct etnaviv_gpu *gpu)
{
int ret;
ret = enable_clk(gpu);
if (ret)
return ret;
if (gpu->clk_bus) {
ret = clk_prepare_enable(gpu->clk_bus);
if (ret)
return ret;
}
ret = enable_axi(gpu);
if (ret) {
disable_clk(gpu);
return ret;
if (gpu->clk_core) {
ret = clk_prepare_enable(gpu->clk_core);
if (ret)
goto disable_clk_bus;
}
if (gpu->clk_shader) {
ret = clk_prepare_enable(gpu->clk_shader);
if (ret)
goto disable_clk_core;
}
return 0;
disable_clk_core:
if (gpu->clk_core)
clk_disable_unprepare(gpu->clk_core);
disable_clk_bus:
if (gpu->clk_bus)
clk_disable_unprepare(gpu->clk_bus);
return ret;
}
static int etnaviv_gpu_clk_disable(struct etnaviv_gpu *gpu)
{
int ret;
ret = disable_axi(gpu);
if (ret)
return ret;
ret = disable_clk(gpu);
if (ret)
return ret;
if (gpu->clk_shader)
clk_disable_unprepare(gpu->clk_shader);
if (gpu->clk_core)
clk_disable_unprepare(gpu->clk_core);
if (gpu->clk_bus)
clk_disable_unprepare(gpu->clk_bus);
return 0;
}