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drm/exynos: fix runtime_pm fimd device state on probe

A call to pm_runtime_set_active() forces device to be at the active
state and skips calling its runtime suspend/resume callbacks. This
results in a freeze with a new power domain code based on gen_pd. Fimd
driver does all required runtime power management calls, so this
pm_runtime_set_active call is buggy. This patch removes it and corrects
clock management in probe function (clocks are now enabled by
pm_runtime_get_sync() call).

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
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1 parent 9866b6c commit 0d8ce3ae37e9bcfacbbc750cabf892fa00bb720e Marek Szyprowski committed with Inki Dae Mar 8, 2012
Showing with 6 additions and 11 deletions.
  1. +6 −11 drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -817,17 +817,13 @@ static int __devinit fimd_probe(struct platform_device *pdev)
goto err_clk_get;
}
- clk_enable(ctx->bus_clk);
-
ctx->lcd_clk = clk_get(dev, "sclk_fimd");
if (IS_ERR(ctx->lcd_clk)) {
dev_err(dev, "failed to get lcd clock\n");
ret = PTR_ERR(ctx->lcd_clk);
goto err_bus_clk;
}
- clk_enable(ctx->lcd_clk);
-
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "failed to find registers\n");
@@ -864,17 +860,11 @@ static int __devinit fimd_probe(struct platform_device *pdev)
goto err_req_irq;
}
- ctx->clkdiv = fimd_calc_clkdiv(ctx, &panel->timing);
ctx->vidcon0 = pdata->vidcon0;
ctx->vidcon1 = pdata->vidcon1;
ctx->default_win = pdata->default_win;
ctx->panel = panel;
- panel->timing.pixclock = clk_get_rate(ctx->lcd_clk) / ctx->clkdiv;
-
- DRM_DEBUG_KMS("pixel clock = %d, clkdiv = %d\n",
- panel->timing.pixclock, ctx->clkdiv);
-
subdrv = &ctx->subdrv;
subdrv->probe = fimd_subdrv_probe;
@@ -889,10 +879,15 @@ static int __devinit fimd_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, ctx);
- pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
+ ctx->clkdiv = fimd_calc_clkdiv(ctx, &panel->timing);
+ panel->timing.pixclock = clk_get_rate(ctx->lcd_clk) / ctx->clkdiv;
+
+ DRM_DEBUG_KMS("pixel clock = %d, clkdiv = %d\n",
+ panel->timing.pixclock, ctx->clkdiv);
+
for (win = 0; win < WINDOWS_NR; win++)
fimd_clear_win(ctx, win);

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