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drm/exynos: consider common clock framework to g2d driver. 

This patch just changes clk_enable/disable to
clk_prepare_enable/clk_disable_unprepare, and
adds related exception codes.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
This commit is contained in:
Inki Dae 2013-07-24 13:40:12 +09:00 committed by Inki Dae
parent de1d367701
commit 89f8b85ecd
1 changed files with 14 additions and 3 deletions
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17
drivers/gpu/drm/exynos/exynos_drm_g2d.c
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@ -806,9 +806,20 @@ static void g2d_dma_start(struct g2d_data *g2d,
struct g2d_cmdlist_node *node =
list_first_entry(&runqueue_node->run_cmdlist,
struct g2d_cmdlist_node, list);
int ret;
pm_runtime_get_sync(g2d->dev);
clk_enable(g2d->gate_clk);
ret = pm_runtime_get_sync(g2d->dev);
if (ret < 0) {
dev_warn(g2d->dev, "failed pm power on.\n");
return;
}
ret = clk_prepare_enable(g2d->gate_clk);
if (ret < 0) {
dev_warn(g2d->dev, "failed to enable clock.\n");
pm_runtime_put_sync(g2d->dev);
return;
}
writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
@ -861,7 +872,7 @@ static void g2d_runqueue_worker(struct work_struct *work)
runqueue_work);
mutex_lock(&g2d->runqueue_mutex);
clk_disable(g2d->gate_clk);
clk_disable_unprepare(g2d->gate_clk);
pm_runtime_put_sync(g2d->dev);
complete(&g2d->runqueue_node->complete);