2017년 03월 02일 17:35에 Andrzej Hajda 이(가) 쓴 글:
> Decon in Exynos5433 has frame counter, it can be used to implement
> get_vblank_counter callback.
>
> Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
> ---
> Hi Inki,
>
> The patch is based on my last patches, maybe to make it clear I will resend all
> these patches in one patchset, what do you think?
One patch set it better. :)
Thanks.
>
> Regards
> Andrzej
>
> drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 76 ++++++++++++++++++---------
> drivers/gpu/drm/exynos/exynos_drm_crtc.c | 11 ++++
> drivers/gpu/drm/exynos/exynos_drm_drv.h | 1 +
> 3 files changed, 63 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> index 4b596dc..4b5af67 100644
> --- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> +++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> @@ -123,6 +123,53 @@ static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
> writel(0, ctx->addr + DECON_VIDINTCON0);
> }
>
> +/* return number of starts/ends of frame transmissions since reset */
> +static u32 decon_get_frame_count(struct decon_context *ctx, bool end)
> +{
> + u32 frm, pfrm, status, cnt;
> +
> + /* To get consistent result repeat read until frame id is stable. */
> + frm = readl(ctx->addr + DECON_CRFMID);
> + cnt = 3;
> + do {
> + status = readl(ctx->addr + DECON_VIDCON1);
> + pfrm = frm;
> + frm = readl(ctx->addr + DECON_CRFMID);
> + } while (frm != pfrm && --cnt);
> +
> + /* CRFMID is incremented on BPORCH in case of I80 and on VSYNC in case
> + * of RGB, it should be taken into account.
> + */
> + if (!frm)
> + return 0;
> +
> + switch (status & (VIDCON1_VSTATUS_MASK | VIDCON1_I80_ACTIVE)) {
> + case VIDCON1_VSTATUS_VS:
> + if (!(ctx->out_type & IFTYPE_I80))
> + --frm;
> + break;
> + case VIDCON1_VSTATUS_BP:
> + --frm;
> + break;
> + case VIDCON1_I80_ACTIVE:
> + case VIDCON1_VSTATUS_AC:
> + if (end)
> + --frm;
> + }
> +
> + return frm;
> +}
> +
> +static u32 decon_get_vblank_counter(struct exynos_drm_crtc *crtc)
> +{
> + struct decon_context *ctx = crtc->ctx;
> +
> + if (test_bit(BIT_SUSPENDED, &ctx->flags))
> + return 0;
> +
> + return decon_get_frame_count(ctx, false);
> +}
> +
> static void decon_setup_trigger(struct decon_context *ctx)
> {
> if (!(ctx->out_type & (IFTYPE_I80 | I80_HW_TRG)))
> @@ -518,6 +565,7 @@ static const struct exynos_drm_crtc_ops decon_crtc_ops = {
> .enable = decon_enable,
> .disable = decon_disable,
> .enable_vblank = decon_enable_vblank,
> + .get_vblank_counter = decon_get_vblank_counter,
> .disable_vblank = decon_disable_vblank,
> .atomic_begin = decon_atomic_begin,
> .update_plane = decon_update_plane,
> @@ -536,6 +584,7 @@ static int decon_bind(struct device *dev, struct device *master, void *data)
> int ret;
>
> ctx->drm_dev = drm_dev;
> + drm_dev->max_vblank_count = 0xffffffff;
>
> for (win = ctx->first_win; win < WINDOWS_NR; win++) {
> int tmp = (win == ctx->first_win) ? 0 : win;
> @@ -581,34 +630,11 @@ static const struct component_ops decon_component_ops = {
>
> static void decon_handle_vblank(struct decon_context *ctx)
> {
> - u32 frm, pfrm, status, cnt;
> + u32 frm;
>
> spin_lock(&ctx->vblank_lock);
>
> - /* To get consistent result repeat read until frame id is stable. */
> - frm = readl(ctx->addr + DECON_CRFMID);
> - cnt = 3;
> - do {
> - status = readl(ctx->addr + DECON_VIDCON1);
> - pfrm = frm;
> - frm = readl(ctx->addr + DECON_CRFMID);
> - } while (frm != pfrm && --cnt);
> -
> - status &= VIDCON1_VSTATUS_MASK | VIDCON1_I80_ACTIVE;
> -
> - /* In case of delayed vblank CRFMID could be already incremented,
> - * it should be taken into account.
> - */
> - if (frm > 0)
> - switch (status) {
> - case VIDCON1_VSTATUS_VS:
> - if (ctx->out_type & IFTYPE_I80)
> - break;
> - case VIDCON1_I80_ACTIVE:
> - case VIDCON1_VSTATUS_BP:
> - case VIDCON1_VSTATUS_AC:
> - --frm;
> - }
> + frm = decon_get_frame_count(ctx, true);
>
> if (frm != ctx->frame_id) {
> if (frm > ctx->frame_id)
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> index 0c9a775..d72777f 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> @@ -132,6 +132,16 @@ static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc)
> exynos_crtc->ops->disable_vblank(exynos_crtc);
> }
>
> +static u32 exynos_drm_crtc_get_vblank_counter(struct drm_crtc *crtc)
> +{
> + struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
> +
> + if (exynos_crtc->ops->get_vblank_counter)
> + return exynos_crtc->ops->get_vblank_counter(exynos_crtc);
> +
> + return 0;
> +}
> +
> static const struct drm_crtc_funcs exynos_crtc_funcs = {
> .set_config = drm_atomic_helper_set_config,
> .page_flip = drm_atomic_helper_page_flip,
> @@ -141,6 +151,7 @@ static const struct drm_crtc_funcs exynos_crtc_funcs = {
> .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
> .enable_vblank = exynos_drm_crtc_enable_vblank,
> .disable_vblank = exynos_drm_crtc_disable_vblank,
> + .get_vblank_counter = exynos_drm_crtc_get_vblank_counter,
> };
>
> struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> index e52f70a..527bf1d 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> @@ -131,6 +131,7 @@ struct exynos_drm_crtc_ops {
> void (*disable)(struct exynos_drm_crtc *crtc);
> int (*enable_vblank)(struct exynos_drm_crtc *crtc);
> void (*disable_vblank)(struct exynos_drm_crtc *crtc);
> + u32 (*get_vblank_counter)(struct exynos_drm_crtc *crtc);
> int (*atomic_check)(struct exynos_drm_crtc *crtc,
> struct drm_crtc_state *state);
> void (*atomic_begin)(struct exynos_drm_crtc *crtc);
>
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