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drm/tegra: output: Make ->setup_clock() optional 

In order to transition output drivers to using the struct tegra_output
as a helper rather than midlayer, make this callback optional. Instead
drivers should implement the equivalent as part of ->mode_fixup(). For
the conversion to atomic modesetting a new callback ->atomic_check()
should be implemented that updates the display controller's state with
the corresponding parent clock, rate and shift clock divider.

Signed-off-by: Thierry Reding <treding@nvidia.com>
hifive-unleashed-5.1
Thierry Reding 2014-12-02 15:12:28 +01:00
parent 132085d84f
commit d5bae6f33e
2 changed files with 9 additions and 11 deletions
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10
drivers/gpu/drm/tegra/dc.c
View File

@ -1066,11 +1066,19 @@ static int tegra_crtc_setup_clk(struct drm_crtc *crtc,
if (!output)
return -ENODEV;
/*
* The ->setup_clock() callback is optional, but if encoders don't
* implement it they most likely need to do the equivalent within the
* ->mode_fixup() callback.
*/
if (!output->ops || !output->ops->setup_clock)
return 0;
/*
* This assumes that the parent clock is pll_d_out0 or pll_d2_out
* respectively, each of which divides the base pll_d by 2.
*/
err = tegra_output_setup_clock(output, dc->clk, pclk, &div);
err = output->ops->setup_clock(output, dc->clk, pclk, &div);
if (err < 0) {
dev_err(dc->dev, "failed to setup clock: %ld\n", err);
return err;

10
drivers/gpu/drm/tegra/drm.h
View File

@ -240,16 +240,6 @@ static inline int tegra_output_disable(struct tegra_output *output)
return output ? -ENOSYS : -EINVAL;
}
static inline int tegra_output_setup_clock(struct tegra_output *output,
struct clk *clk, unsigned long pclk,
unsigned int *div)
{
if (output && output->ops && output->ops->setup_clock)
return output->ops->setup_clock(output, clk, pclk, div);
return output ? -ENOSYS : -EINVAL;
}
static inline int tegra_output_check_mode(struct tegra_output *output,
struct drm_display_mode *mode,
enum drm_mode_status *status)