lkml.org 
[lkml]   [2019]   [Dec]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC PATCH v3 7/7] drm: exynos: mixer: Add interconnect support
From
Date
Hi,

19. 12. 20. 오후 8:56에 Artur Świgoń 이(가) 쓴 글:
> From: Marek Szyprowski <m.szyprowski@samsung.com>
>
> This patch adds interconnect support to exynos-mixer. The mixer works
> the same as before when CONFIG_INTERCONNECT is 'n'.
>
> Co-developed-by: Artur Świgoń <a.swigon@samsung.com>
> Signed-off-by: Artur Świgoń <a.swigon@samsung.com>
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
> drivers/gpu/drm/exynos/exynos_mixer.c | 71 +++++++++++++++++++++++++--
> 1 file changed, 66 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
> index 6cfdb95fef2f..a7e7240a055f 100644
> --- a/drivers/gpu/drm/exynos/exynos_mixer.c
> +++ b/drivers/gpu/drm/exynos/exynos_mixer.c
> @@ -13,6 +13,7 @@
> #include <linux/component.h>
> #include <linux/delay.h>
> #include <linux/i2c.h>
> +#include <linux/interconnect.h>
> #include <linux/interrupt.h>
> #include <linux/irq.h>
> #include <linux/kernel.h>
> @@ -97,6 +98,7 @@ struct mixer_context {
> struct exynos_drm_crtc *crtc;
> struct exynos_drm_plane planes[MIXER_WIN_NR];
> unsigned long flags;
> + struct icc_path *soc_path;
>
> int irq;
> void __iomem *mixer_regs;
> @@ -931,6 +933,40 @@ static void mixer_disable_vblank(struct exynos_drm_crtc *crtc)
> mixer_reg_writemask(mixer_ctx, MXR_INT_EN, 0, MXR_INT_EN_VSYNC);
> }
>
> +static void mixer_set_memory_bandwidth(struct exynos_drm_crtc *crtc)
> +{
> + struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
> + struct mixer_context *ctx = crtc->ctx;
> + unsigned long bw, bandwidth = 0;
> + int i, j, sub;
> +
> + if (!ctx->soc_path)
> + return;
> +
> + for (i = 0; i < MIXER_WIN_NR; i++) {
> + struct drm_plane *plane = &ctx->planes[i].base;
> + const struct drm_format_info *format;
> +
> + if (plane->state && plane->state->crtc && plane->state->fb) {
> + format = plane->state->fb->format;
> + bw = mode->hdisplay * mode->vdisplay *
> + drm_mode_vrefresh(mode);
> + if (mode->flags & DRM_MODE_FLAG_INTERLACE)
> + bw /= 2;
> + for (j = 0; j < format->num_planes; j++) {
> + sub = j ? (format->vsub * format->hsub) : 1;
> + bandwidth += format->cpp[j] * bw / sub;
> + }
> + }
> + }
> +
> + /* add 20% safety margin */
> + bandwidth = bandwidth / 4 * 5;
> +
> + dev_dbg(ctx->dev, "exynos-mixer: safe bandwidth %ld Bps\n", bandwidth);
> + icc_set_bw(ctx->soc_path, Bps_to_icc(bandwidth), 0);
> +}
> +
> static void mixer_atomic_begin(struct exynos_drm_crtc *crtc)
> {
> struct mixer_context *ctx = crtc->ctx;
> @@ -982,6 +1018,7 @@ static void mixer_atomic_flush(struct exynos_drm_crtc *crtc)
> if (!test_bit(MXR_BIT_POWERED, &mixer_ctx->flags))
> return;
>
> + mixer_set_memory_bandwidth(crtc);
> mixer_enable_sync(mixer_ctx);
> exynos_crtc_handle_event(crtc);
> }
> @@ -1029,6 +1066,7 @@ static void mixer_disable(struct exynos_drm_crtc *crtc)
> for (i = 0; i < MIXER_WIN_NR; i++)
> mixer_disable_plane(crtc, &ctx->planes[i]);
> > + mixer_set_memory_bandwidth(crtc);

Your intention is to set peak and average bandwidth to 0 at disabling mixer device?

Thanks,
Inki Dae

\
 
 \ /
  Last update: 2019-12-24 05:54    [W:0.156 / U:16.412 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site