diff options
| author | Wen Yi <wyi@nvidia.com> | 2011-03-23 17:18:47 -0700 |
|---|---|---|
| committer | Varun Colbert <vcolbert@nvidia.com> | 2011-03-29 17:19:33 -0700 |
| commit | 78f8a86ecf4b00e74628a2287f95d163606e28ee (patch) | |
| tree | 3a2abf5a27b6975771ce21dc21b2afec39063b72 /drivers | |
| parent | 27ab1cc06532f59a7ecf1fd3f59aaac3f5e9da74 (diff) | |
video: tegra: dc: emc scaling based on overlay and panel freq
Change the emc frequency using number of overlays and the frequency
of the display panel.
Bug 800993
Change-Id: I30ef2edd1ed9b43afa8c38b0f05b5d6e49b7f892
Reviewed-on: http://git-master/r/24052
Reviewed-by: Amit Kamath <akamath@nvidia.com>
Reviewed-by: Wen Yi <wyi@nvidia.com>
Tested-by: Wen Yi <wyi@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Reviewed-by: Matthew Longnecker <mlongnecker@nvidia.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/tegra/dc/overlay.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/video/tegra/dc/overlay.c b/drivers/video/tegra/dc/overlay.c index 4b1a9ec53711..99aa4e8825e4 100644 --- a/drivers/video/tegra/dc/overlay.c +++ b/drivers/video/tegra/dc/overlay.c @@ -305,7 +305,17 @@ surf_err: kfree(data); return err; } +static void tegra_overlay_set_emc_freq(struct tegra_overlay_info *dev) +{ + unsigned long emc_freq = 0; + int i; + for (i = 0; i < dev->dc->n_windows; i++) { + if (dev->overlays[i].owner != NULL) + emc_freq += dev->dc->mode.pclk*(i==1?2:1); + } + clk_set_rate(dev->dc->emc_clk, emc_freq); +} /* Overlay functions */ static bool tegra_overlay_get(struct overlay_client *client, int idx) @@ -320,6 +330,8 @@ static bool tegra_overlay_get(struct overlay_client *client, int idx) if (dev->overlays[idx].owner == NULL) { dev->overlays[idx].owner = client; ret = true; + if (dev->dc->mode.pclk != 0) + tegra_overlay_set_emc_freq(dev); } mutex_unlock(&dev->overlays_lock); @@ -345,6 +357,8 @@ static void tegra_overlay_put_locked(struct overlay_client *client, int idx) flip_args.win[2].index = -1; tegra_overlay_flip(dev, &flip_args, NULL); + if (dev->dc->mode.pclk != 0) + tegra_overlay_set_emc_freq(dev); } static void tegra_overlay_put(struct overlay_client *client, int idx) |