Request it based solely on the current mode's refresh rate. More
accurate requirements can be requested in future patches.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso at collabora.com>
---
drivers/gpu/drm/tegra/dc.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index ef40381..6739d69 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -10,6 +10,7 @@
#include <linux/clk.h>
#include <linux/debugfs.h>
#include <linux/reset.h>
+#include <linux/platform_data/tegra_emc.h>
#include "dc.h"
#include "drm.h"
@@ -683,6 +684,8 @@ static void tegra_crtc_disable(struct drm_crtc *crtc)
}
drm_vblank_off(drm, dc->pipe);
+
+ tegra124_emc_reserve_bandwidth(TEGRA_EMC_CONSUMER_DISP1, 0);
}
static bool tegra_crtc_mode_fixup(struct drm_crtc *crtc,
@@ -769,6 +772,7 @@ static int tegra_crtc_mode_set(struct drm_crtc *crtc,
struct tegra_dc *dc = to_tegra_dc(crtc);
struct tegra_dc_window window;
u32 value;
+ unsigned long bandwidth;
int err;
drm_vblank_pre_modeset(crtc->dev, dc->pipe);
@@ -809,6 +813,11 @@ static int tegra_crtc_mode_set(struct drm_crtc *crtc,
if (err < 0)
dev_err(dc->dev, "failed to enable root plane\n");
+ bandwidth = mode->clock * window.bits_per_pixel / 8;
+ err = tegra124_emc_reserve_bandwidth(TEGRA_EMC_CONSUMER_DISP1,
bandwidth);
+ if (err)
+ dev_err(dc->dev, "failed to reserve EMC bandwidth: %d\n", err);
+
return 0;
}
--
1.9.3
