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drm/tegra: dc: Store clock setup in atomic state

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This allows the clock setup to be separated from the clock programming
and better matches the expectations of the atomic modesetting where no
code paths must fail during modeset.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2014-12-08 16:14:45 +01:00
parent 07866963b6
commit ca915b108a
2 changed files with 72 additions and 3 deletions
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71
drivers/gpu/drm/tegra/dc.c
View File

@ -41,6 +41,22 @@ static inline struct tegra_plane *to_tegra_plane(struct drm_plane *plane)
return container_of(plane, struct tegra_plane, base);
}
struct tegra_dc_state {
struct drm_crtc_state base;
struct clk *clk;
unsigned long pclk;
unsigned int div;
};
static inline struct tegra_dc_state *to_dc_state(struct drm_crtc_state *state)
{
if (state)
return container_of(state, struct tegra_dc_state, base);
return NULL;
}
static void tegra_dc_window_commit(struct tegra_dc *dc, unsigned int index)
{
u32 value = WIN_A_ACT_REQ << index;
@ -1004,13 +1020,48 @@ static void tegra_dc_destroy(struct drm_crtc *crtc)
drm_crtc_cleanup(crtc);
}
static void tegra_crtc_reset(struct drm_crtc *crtc)
{
struct tegra_dc_state *state;
kfree(crtc->state);
crtc->state = NULL;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (state)
crtc->state = &state->base;
}
static struct drm_crtc_state *
tegra_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
{
struct tegra_dc_state *state = to_dc_state(crtc->state);
struct tegra_dc_state *copy;
copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
if (!copy)
return NULL;
copy->base.mode_changed = false;
copy->base.planes_changed = false;
copy->base.event = NULL;
return &copy->base;
}
static void tegra_crtc_atomic_destroy_state(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
kfree(state);
}
static const struct drm_crtc_funcs tegra_crtc_funcs = {
.page_flip = tegra_dc_page_flip,
.set_config = drm_crtc_helper_set_config,
.destroy = tegra_dc_destroy,
.reset = drm_atomic_helper_crtc_reset,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
.reset = tegra_crtc_reset,
.atomic_duplicate_state = tegra_crtc_atomic_duplicate_state,
.atomic_destroy_state = tegra_crtc_atomic_destroy_state,
};
static void tegra_dc_stop(struct tegra_dc *dc)
@ -1148,6 +1199,20 @@ int tegra_dc_setup_clock(struct tegra_dc *dc, struct clk *parent,
return 0;
}
int tegra_dc_state_setup_clock(struct tegra_dc *dc,
struct drm_crtc_state *crtc_state,
struct clk *clk, unsigned long pclk,
unsigned int div)
{
struct tegra_dc_state *state = to_dc_state(crtc_state);
state->clk = clk;
state->pclk = pclk;
state->div = div;
return 0;
}
static void tegra_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
struct drm_display_mode *mode = &crtc->state->adjusted_mode;

4
drivers/gpu/drm/tegra/drm.h
View File

@ -180,6 +180,10 @@ void tegra_dc_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file);
void tegra_dc_commit(struct tegra_dc *dc);
int tegra_dc_setup_clock(struct tegra_dc *dc, struct clk *parent,
unsigned long pclk, unsigned int div);
int tegra_dc_state_setup_clock(struct tegra_dc *dc,
struct drm_crtc_state *crtc_state,
struct clk *clk, unsigned long pclk,
unsigned int div);
struct tegra_output {
struct device_node *of_node;