evie/android_kernel_oneplus_msm8998
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msm: mdss: fix the logic for configuration of DSI clock source

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The DSI clocks need to sourced out of the correct DSI PLL depending
on the h/w configuration. The current assumption is that the
clk_set_parent operation on DSI branch clocks is necessary for
targets which support 2 DSI PLLs. However, there is a possibility
that the DSI clock source needs to be set even for single DSI
targets if the clock driver implements multi-parent based
approach for DSI RCG clock structures. Add change to take care
of this.

Change-Id: Ib399a8264d0d9919701c70ed6a77d50a69ec386c
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
This commit is contained in:
Padmanabhan Komanduru 2016-01-19 17:43:18 +05:30 • committed by David Keitel
parent bc27abf530
commit 11cb05daed
1 changed files with 17 additions and 7 deletions
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24
drivers/video/fbdev/msm/mdss_dsi.c
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@ -80,9 +80,8 @@ static void mdss_dsi_config_clk_src(struct platform_device *pdev)
struct mdss_dsi_data *dsi_res = platform_get_drvdata(pdev);
struct dsi_shared_data *sdata = dsi_res->shared_data;
if (!sdata->ext_byte0_clk || !sdata->ext_byte1_clk ||
!sdata->ext_pixel0_clk || !sdata->ext_pixel1_clk) {
pr_debug("%s: config_clk_src not needed\n", __func__);
if (!sdata->ext_byte0_clk || !sdata->ext_pixel0_clk) {
pr_debug("%s: DSI-0 ext. clocks not present\n", __func__);
return;
}
@ -102,10 +101,15 @@ static void mdss_dsi_config_clk_src(struct platform_device *pdev)
if (mdss_dsi_is_hw_config_split(sdata)) {
sdata->byte1_parent = sdata->byte0_parent;
sdata->pixel1_parent = sdata->pixel0_parent;
} else {
} else if (sdata->ext_byte1_clk && sdata->ext_pixel1_clk) {
sdata->byte1_parent = sdata->ext_byte1_clk;
sdata->pixel1_parent = sdata->ext_pixel1_clk;
} else {
pr_debug("%s: DSI-1 external clocks not present\n",
__func__);
return;
}
pr_debug("%s: default: DSI0 <--> PLL0, DSI1 <--> %s", __func__,
mdss_dsi_is_hw_config_split(sdata) ? "PLL0" : "PLL1");
} else {
@ -122,9 +126,15 @@ static void mdss_dsi_config_clk_src(struct platform_device *pdev)
sdata->byte0_parent = sdata->ext_byte0_clk;
sdata->pixel0_parent = sdata->ext_pixel0_clk;
} else if (mdss_dsi_is_pll_src_pll1(sdata)) {
pr_debug("%s: single source: PLL1", __func__);
sdata->byte0_parent = sdata->ext_byte1_clk;
sdata->pixel0_parent = sdata->ext_pixel1_clk;
if (sdata->ext_byte1_clk && sdata->ext_pixel1_clk) {
pr_debug("%s: single source: PLL1", __func__);
sdata->byte0_parent = sdata->ext_byte1_clk;
sdata->pixel0_parent = sdata->ext_pixel1_clk;
} else {
pr_err("%s: DSI-1 external clocks not present\n",
__func__);
return;
}
}
sdata->byte1_parent = sdata->byte0_parent;
sdata->pixel1_parent = sdata->pixel0_parent;