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Subject[PATCH 16/20] video: msm: Set the EBI1 clock to 128MHz when performing blits
Date
This makes sure that the MDP (locked to AXI) and the AXI/ABI1 run at the
maximum frequency during blit operations.

Authors:
Dima Zavin <dima@android.com>
Rebecca Schultz Zavin <rebecca@android.com>
Colin Cross <ccross@android.com>

Signed-off-by: Carl Vanderlip <carlv@codeaurora.org>
---
drivers/video/msm/mdp.c | 11 +++++++++++
drivers/video/msm/mdp_hw.h | 1 +
2 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/drivers/video/msm/mdp.c b/drivers/video/msm/mdp.c
index b03204d..0bb19fa 100644
--- a/drivers/video/msm/mdp.c
+++ b/drivers/video/msm/mdp.c
@@ -52,6 +52,7 @@ static int locked_enable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
}
/* if the mdp irq is not already enabled enable it */
if (!mdp_irq_mask) {
+ clk_set_rate(mdp->ebi1_clk, 128000000);
clk_enable(mdp->clk);
enable_irq(mdp->irq);
}
@@ -656,6 +657,13 @@ int mdp_probe(struct platform_device *pdev)
goto error_get_mdp_clk;
}

+ mdp->ebi1_clk = clk_get(NULL, "ebi1_clk");
+ if (IS_ERR(mdp->ebi1_clk)) {
+ pr_err("mdp: failed to get ebi1 clk\n");
+ ret = PTR_ERR(mdp->ebi1_clk);
+ goto error_get_ebi1_clk;
+ }
+
ret = request_irq(mdp->irq, mdp_isr, IRQF_DISABLED, "msm_mdp", mdp);
if (ret)
goto error_request_irq;
@@ -681,6 +689,9 @@ int mdp_probe(struct platform_device *pdev)
error_device_register:
free_irq(mdp->irq, mdp);
error_request_irq:
+ clk_put(mdp->ebi1_clk);
+error_get_ebi1_clk:
+ clk_put(mdp->clk);
error_get_mdp_clk:
error_mddi_pmdh_register:
iounmap(mdp->base);
diff --git a/drivers/video/msm/mdp_hw.h b/drivers/video/msm/mdp_hw.h
index fdf9e5e..7485a9e 100644
--- a/drivers/video/msm/mdp_hw.h
+++ b/drivers/video/msm/mdp_hw.h
@@ -46,6 +46,7 @@ struct mdp_info {
char * __iomem base;
int irq;
struct clk *clk;
+ struct clk *ebi1_clk;
struct mdp_out_interface out_if[MSM_MDP_NUM_INTERFACES];
int format;
int pack_pattern;
--
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.


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