[PATCH] drm: sti: implement CRC capture API
Daniel Vetter
daniel at ffwll.ch
Thu Jan 5 14:16:40 UTC 2017
On Thu, Jan 05, 2017 at 12:12:36PM +0100, Benjamin Gaignard wrote:
> Use CRC API to retrieve the 3 crc values from hardware.
>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard at linaro.org>
> ---
> This patch should be applied on top of drm-misc branch where Tomeu
> has change crc.lock.
>
> I think that wake_up_interruptible() could also be call at the end
> of drm_crtc_add_crc_entry() to avoid putting it in all drivers.
+1 on moving the wake_up call into the drm_crtc_add_crc_entry function.
Care to spin that patch please?
-Daniel
>
> Cc: Tomeu Vizoso <tomeu.vizoso at collabora.com>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> ---
> drivers/gpu/drm/sti/sti_crtc.c | 27 +++++++++++++++++++++++
> drivers/gpu/drm/sti/sti_mixer.c | 47 +++++++++++++++++++++++++++++++++++++++++
> drivers/gpu/drm/sti/sti_mixer.h | 4 ++++
> 3 files changed, 78 insertions(+)
>
> diff --git a/drivers/gpu/drm/sti/sti_crtc.c b/drivers/gpu/drm/sti/sti_crtc.c
> index e992bed..47022b4 100644
> --- a/drivers/gpu/drm/sti/sti_crtc.c
> +++ b/drivers/gpu/drm/sti/sti_crtc.c
> @@ -20,6 +20,8 @@
> #include "sti_vid.h"
> #include "sti_vtg.h"
>
> +#define CRC_SAMPLES 3
> +
> static void sti_crtc_enable(struct drm_crtc *crtc)
> {
> struct sti_mixer *mixer = to_sti_mixer(crtc);
> @@ -253,6 +255,8 @@ int sti_crtc_vblank_cb(struct notifier_block *nb,
> unsigned long flags;
> struct sti_private *priv;
> unsigned int pipe;
> + u32 crcs[CRC_SAMPLES];
> + int ret;
>
> priv = crtc->dev->dev_private;
> pipe = drm_crtc_index(crtc);
> @@ -275,6 +279,12 @@ int sti_crtc_vblank_cb(struct notifier_block *nb,
> }
> spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
>
> + if (!sti_mixer_read_crcs(mixer, &crcs[0], &crcs[1], &crcs[2])) {
> + ret = drm_crtc_add_crc_entry(crtc, false, 0, crcs);
> + if (!ret)
> + wake_up_interruptible(&crtc->crc.wq);
> + }
> +
> if (mixer->status == STI_MIXER_DISABLING) {
> struct drm_plane *p;
>
> @@ -343,6 +353,22 @@ static int sti_crtc_late_register(struct drm_crtc *crtc)
> return 0;
> }
>
> +int sti_set_crc_source(struct drm_crtc *crtc, const char *source,
> + size_t *values_cnt)
> +{
> + struct sti_mixer *mixer = to_sti_mixer(crtc);
> +
> + *values_cnt = CRC_SAMPLES;
> +
> + if (!source)
> + return sti_mixer_set_crc_status(mixer, false);
> +
> + if (source && strcmp(source, "auto") == 0)
> + return sti_mixer_set_crc_status(mixer, true);
> +
> + return -EINVAL;
> +}
> +
> static const struct drm_crtc_funcs sti_crtc_funcs = {
> .set_config = drm_atomic_helper_set_config,
> .page_flip = drm_atomic_helper_page_flip,
> @@ -352,6 +378,7 @@ static int sti_crtc_late_register(struct drm_crtc *crtc)
> .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
> .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
> .late_register = sti_crtc_late_register,
> + .set_crc_source = sti_set_crc_source,
> };
>
> bool sti_crtc_is_main(struct drm_crtc *crtc)
> diff --git a/drivers/gpu/drm/sti/sti_mixer.c b/drivers/gpu/drm/sti/sti_mixer.c
> index 4ddc58f..4eb5cc5 100644
> --- a/drivers/gpu/drm/sti/sti_mixer.c
> +++ b/drivers/gpu/drm/sti/sti_mixer.c
> @@ -27,6 +27,13 @@
> #define GAM_MIXER_ACT 0x38
> #define GAM_MIXER_MBP 0x3C
> #define GAM_MIXER_MX0 0x80
> +#define GAM_MIXER_MISR_CTL 0xA0
> +#define GAM_MIXER_MISR_STA 0xA4
> +#define GAM_MIXER_SIGN1 0xA8
> +#define GAM_MIXER_SIGN2 0xAC
> +#define GAM_MIXER_SIGN3 0xB0
> +#define GAM_MIXER_MISR_AVO 0xB4
> +#define GAM_MIXER_MISR_AVS 0xB8
>
> /* id for depth of CRB reg */
> #define GAM_DEPTH_VID0_ID 1
> @@ -162,6 +169,13 @@ static int mixer_dbg_show(struct seq_file *s, void *arg)
> DBGFS_DUMP(GAM_MIXER_MBP);
> DBGFS_DUMP(GAM_MIXER_MX0);
> mixer_dbg_mxn(s, mixer->regs + GAM_MIXER_MX0);
> + DBGFS_DUMP(GAM_MIXER_MISR_CTL);
> + DBGFS_DUMP(GAM_MIXER_MISR_STA);
> + DBGFS_DUMP(GAM_MIXER_SIGN1);
> + DBGFS_DUMP(GAM_MIXER_SIGN2);
> + DBGFS_DUMP(GAM_MIXER_SIGN3);
> + DBGFS_DUMP(GAM_MIXER_MISR_AVO);
> + DBGFS_DUMP(GAM_MIXER_MISR_AVS);
> seq_puts(s, "\n");
>
> return 0;
> @@ -202,6 +216,36 @@ int sti_mixer_debugfs_init(struct sti_mixer *mixer, struct drm_minor *minor)
> minor->debugfs_root, minor);
> }
>
> +int sti_mixer_set_crc_status(struct sti_mixer *mixer, bool enable)
> +{
> + if (enable) {
> + sti_mixer_reg_read(mixer, GAM_MIXER_MISR_STA);
> + sti_mixer_reg_read(mixer, GAM_MIXER_SIGN1);
> + sti_mixer_reg_read(mixer, GAM_MIXER_SIGN2);
> + sti_mixer_reg_read(mixer, GAM_MIXER_SIGN3);
> + sti_mixer_reg_write(mixer, GAM_MIXER_MISR_CTL, 0x0F);
> + } else {
> + sti_mixer_reg_write(mixer, GAM_MIXER_MISR_CTL, 0x00);
> + }
> +
> + return 0;
> +}
> +
> +int sti_mixer_read_crcs(struct sti_mixer *mixer,
> + u32 *sign1, u32 *sign2, u32 *sign3)
> +{
> + u32 status = sti_mixer_reg_read(mixer, GAM_MIXER_MISR_STA);
> +
> + if (!(status & 0x1))
> + return -EINVAL;
> +
> + *sign1 = sti_mixer_reg_read(mixer, GAM_MIXER_SIGN1);
> + *sign2 = sti_mixer_reg_read(mixer, GAM_MIXER_SIGN2);
> + *sign3 = sti_mixer_reg_read(mixer, GAM_MIXER_SIGN3);
> +
> + return 0;
> +}
> +
> void sti_mixer_set_background_status(struct sti_mixer *mixer, bool enable)
> {
> u32 val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL);
> @@ -301,6 +345,9 @@ int sti_mixer_active_video_area(struct sti_mixer *mixer,
> sti_mixer_reg_write(mixer, GAM_MIXER_AVO, ydo << 16 | xdo);
> sti_mixer_reg_write(mixer, GAM_MIXER_AVS, yds << 16 | xds);
>
> + sti_mixer_reg_write(mixer, GAM_MIXER_MISR_AVO, ydo << 16 | xdo);
> + sti_mixer_reg_write(mixer, GAM_MIXER_MISR_AVS, yds << 16 | xds);
> +
> sti_mixer_set_background_color(mixer, bkg_color);
>
> sti_mixer_set_background_area(mixer, mode);
> diff --git a/drivers/gpu/drm/sti/sti_mixer.h b/drivers/gpu/drm/sti/sti_mixer.h
> index 830a3c4..b16feb1 100644
> --- a/drivers/gpu/drm/sti/sti_mixer.h
> +++ b/drivers/gpu/drm/sti/sti_mixer.h
> @@ -55,6 +55,10 @@ int sti_mixer_active_video_area(struct sti_mixer *mixer,
>
> void sti_mixer_set_background_status(struct sti_mixer *mixer, bool enable);
>
> +int sti_mixer_set_crc_status(struct sti_mixer *mixer, bool enable);
> +int sti_mixer_read_crcs(struct sti_mixer *mixer,
> + u32 *sign1, u32 *sign2, u32 *sign3);
> +
> int sti_mixer_debugfs_init(struct sti_mixer *mixer, struct drm_minor *minor);
>
> /* depth in Cross-bar control = z order */
> --
> 1.9.1
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
More information about the dri-devel
mailing list