From mboxrd@z Thu Jan 1 00:00:00 1970 From: Carl Vanderlip Date: Fri, 18 Mar 2011 21:59:34 +0000 Subject: [PATCH 17/20] video: msm: Prevent framebuffer glitch during initialization Message-Id: <1300485574-27600-1-git-send-email-carlv@codeaurora.org> List-Id: References: <1300484846-26393-1-git-send-email-carlv@codeaurora.org> In-Reply-To: <1300484846-26393-1-git-send-email-carlv@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org Holds a reference to the mdp_clk until lateinit, and moves the frambuffer initialization to device_init. The framebuffer lcdc driver will grab a reference to mdp_clk, which prevents the clock from being disabled by clock_late_init. Authors: Dima Zavin Rebecca Schultz Zavin Colin Cross Signed-off-by: Carl Vanderlip --- drivers/video/msm/mdp.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/drivers/video/msm/mdp.c b/drivers/video/msm/mdp.c index 0bb19fa..b3f334ad 100644 --- a/drivers/video/msm/mdp.c +++ b/drivers/video/msm/mdp.c @@ -38,6 +38,7 @@ struct class *mdp_class; static DECLARE_WAIT_QUEUE_HEAD(mdp_ppp_waitqueue); static unsigned int mdp_irq_mask; +struct clk *mdp_clk_to_disable_later; DEFINE_MUTEX(mdp_mutex); static int locked_enable_mdp_irq(struct mdp_info *mdp, uint32_t mask) @@ -670,6 +671,7 @@ int mdp_probe(struct platform_device *pdev) disable_irq(mdp->irq); clk_enable(mdp->clk); + mdp_clk_to_disable_later = mdp->clk; mdp_hw_init(mdp); /* register mdp device */ @@ -706,6 +708,13 @@ static struct platform_driver msm_mdp_driver = { .driver = {.name = "msm_mdp"}, }; +static int __init mdp_lateinit(void) +{ + if (mdp_clk_to_disable_later) + clk_disable(mdp_clk_to_disable_later); + return 0; +} + static int __init mdp_init(void) { mdp_class = class_create(THIS_MODULE, "msm_mdp"); @@ -717,3 +726,4 @@ static int __init mdp_init(void) } subsys_initcall(mdp_init); +late_initcall(mdp_lateinit); -- Sent by an employee of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.