On Tue, Jul 23, 2019 at 02:20:16PM +0200, Artur Świgoń wrote:
From: Marek Szyprowski m.szyprowski@samsung.com
This patch adds interconnect support to exynos-mixer. Please note that the mixer works the same as before when CONFIG_INTERCONNECT is 'n'.
Co-developed-by: Artur Świgoń a.swigon@partner.samsung.com Signed-off-by: Artur Świgoń a.swigon@partner.samsung.com Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com
drivers/gpu/drm/exynos/exynos_mixer.c | 68 +++++++++++++++++++++++++-- 1 file changed, 63 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index 7b24338fad3c..fb763854b300 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 +933,37 @@ 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;
Early exit if !ctx->soc_path, no need to figure out the bandwidth. Optionally check it before calling mixer_set_memory_bandwidth() - should not hurt readability.
- 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 = 5UL * bandwidth / 4;
- pr_info("exynos-mixer: safe bandwidth %ld Bps\n", bandwidth);
dev_dbg()
Best regards, Krzysztof