diff options
| author | Mayuresh Kulkarni <mkulkarni@nvidia.com> | 2011-09-19 17:23:58 +0530 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2011-09-26 10:47:18 -0700 |
| commit | 5c01c2e99b44ed52cda27695b2a70a2beb5b7d45 (patch) | |
| tree | d8209f8bcaae1ec416567a08805328fce5d464f2 /drivers/media/video | |
| parent | 9dc6277e84a504d30dd5c07853301decf66c3060 (diff) | |
video: tegra: avp: set emc to max if avp clock is max
this change ensures that emc clock is set to maximum when
avp clock goes maximum. it over-rides the emc clock
send by platform data when avp clock is maximum. it restores
the platform specific emc clock (if any) when the next
non-maximum avp clock request comes. if no emc platform
specific clock is specified, it restores the maximum emc clock
for bug 876402
Change-Id: Id5e454a5a63b1679906d8612c6e24958bace1663
Signed-off-by: Mayuresh Kulkarni <mkulkarni@nvidia.com>
Reviewed-on: http://git-master/r/53193
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Tested-by: Bharat Nihalani <bnihalani@nvidia.com>
Reviewed-by: Mohan Nimaje <mnimaje@nvidia.com>
Diffstat (limited to 'drivers/media/video')
| -rw-r--r-- | drivers/media/video/tegra/avp/avp_svc.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/media/video/tegra/avp/avp_svc.c b/drivers/media/video/tegra/avp/avp_svc.c index 37a8ecdf7d0a..9b253e1cbe4d 100644 --- a/drivers/media/video/tegra/avp/avp_svc.c +++ b/drivers/media/video/tegra/avp/avp_svc.c @@ -100,6 +100,8 @@ struct avp_svc_info { /* client for remote allocations, for easy tear down */ struct nvmap_client *nvmap_remote; struct trpc_node *rpc_node; + unsigned long max_avp_rate; + unsigned long emc_rate; }; static void do_svc_nvmap_create(struct avp_svc_info *avp_svc, @@ -462,6 +464,18 @@ static void do_svc_module_clock_set(struct avp_svc_info *avp_svc, mutex_lock(&avp_svc->clk_lock); if (msg->module_id == AVP_MODULE_ID_AVP) { + /* check if max avp clock is asked and set max emc frequency */ + if (msg->clk_freq >= avp_svc->max_avp_rate) { + clk_set_rate(avp_svc->emcclk, ULONG_MAX); + } + else { + /* if no, set emc frequency as per platform data. + * if no platform data is send, set it to maximum */ + if (avp_svc->emc_rate) + clk_set_rate(avp_svc->emcclk, avp_svc->emc_rate); + else + clk_set_rate(avp_svc->emcclk, ULONG_MAX); + } ret = clk_set_rate(avp_svc->sclk, msg->clk_freq); } else { aclk = &avp_svc->clks[mod->clk_req]; @@ -806,6 +820,7 @@ struct avp_svc_info *avp_svc_init(struct platform_device *pdev, ret = -ENOENT; goto err_get_clks; } + avp_svc->max_avp_rate = clk_round_rate(avp_svc->sclk, ULONG_MAX); clk_set_rate(avp_svc->sclk, 0); avp_svc->emcclk = clk_get(&pdev->dev, "emc"); @@ -820,8 +835,11 @@ struct avp_svc_info *avp_svc_init(struct platform_device *pdev, * requested in platform data. Set the rate to ULONG_MAX * if platform data is NULL. */ - if (pdata) + avp_svc->emc_rate = 0; + if (pdata) { clk_set_rate(avp_svc->emcclk, pdata->emc_clk_rate); + avp_svc->emc_rate = pdata->emc_clk_rate; + } else clk_set_rate(avp_svc->emcclk, ULONG_MAX); |