Messages in this thread Patch in this message | | | From | Carl Vanderlip <> | Subject | [PATCH 18/20] video: msm: Prevent DMA lockups when switching bit depths | Date | Fri, 18 Mar 2011 14:59:45 -0700 |
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Forces the lcdc off and waits a frame vsync period to prevent the MDP DMA engine crashing if the DMA bit depth is changed. A sleep cannot be used because lcdc_dma_start is called in irq context.
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 | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/video/msm/mdp.c b/drivers/video/msm/mdp.c index b3f334ad..49d956a 100644 --- a/drivers/video/msm/mdp.c +++ b/drivers/video/msm/mdp.c @@ -564,6 +564,13 @@ void mdp_hw_init(struct mdp_info *mdp) mdp_writel(mdp, 1, 0x60); mdp_writel(mdp, 1, MDP_EBI2_PORTMAP_MODE); + /* disable lcdc */ + mdp_writel(mdp, 0, MDP_LCDC_CTL); + /* enable auto clock gating for all blocks by default */ + mdp_writel(mdp, 0xffffffff, MDP_CGC_EN); + /* reset color/gamma correct parms */ + mdp_writel(mdp, 0, MDP_DMA_P_COLOR_CORRECT_CONFIG); + mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01f8); mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01fc); mdp_writel(mdp, 1, 0x60); -- 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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