evie/android_kernel_oneplus_msm8998
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msm: mdss: add support to featurize NULL packet insertion

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For DSI6G v1.4.0 and above, DSI controller has support to insert
NULL packets in the middle of pixel data or DMA packets to avoid
HS-LP-HS transitions. Add support to featurize this based on DT
property.

Crs-Fixed: 880973
Change-Id: I36acfe6d27a1d750a5af12c3d136df473abb4598
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
This commit is contained in:
Siddhartha Agrawal 2015-08-28 13:46:28 -07:00 • committed by David Keitel
parent 3c115aaa2f
commit d84d76e2e3
4 changed files with 9 additions and 1 deletions
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3
Documentation/devicetree/bindings/fb/mdss-dsi.txt
View file

@ -110,6 +110,8 @@ Optional properties:
controller. These pin configurations are installed in the pinctrl
device node. Refer to pinctrl-bindings.txt
- qcom,regulator-ldo-mode: Boolean to enable ldo mode for the dsi phy regulator
- qcom,null-insertion-enabled: Boolean to enable NULL packet insertion
feature for DSI controller.
- qcom,dsi-irq-line: Boolean specifies if DSI has a different irq line than mdp.
- qcom,lane-map: Specifies the data lane swap configuration.
"lane_map_0123" = <0 1 2 3> (default value)
@ -222,6 +224,7 @@ Example:
qcom,mmss-ulp-clamp-ctrl-offset = <0x20>;
qcom,mmss-phyreset-ctrl-offset = <0x24>;
qcom,regulator-ldo-mode;
qcom,null-insertion-enabled;
pinctrl-names = "mdss_default", "mdss_sleep";
pinctrl-0 = <&mdss_dsi_active>;

3
drivers/video/fbdev/msm/mdss_dsi.c
View file

@ -3166,6 +3166,9 @@ static int mdss_dsi_parse_ctrl_params(struct platform_device *ctrl_pdev,
struct mdss_panel_info *pinfo = &(ctrl_pdata->panel_data.panel_info);
const char *data;
ctrl_pdata->null_insert_enabled = of_property_read_bool(
ctrl_pdev->dev.of_node, "qcom,null-insertion-enabled");
data = of_get_property(ctrl_pdev->dev.of_node,
"qcom,platform-strength-ctrl", &len);
if (!data) {

1
drivers/video/fbdev/msm/mdss_dsi.h
View file

@ -459,6 +459,7 @@ struct mdss_dsi_ctrl_pdata {
struct regulator *ibb; /* vreg handle */
struct mutex clk_lane_mutex;
bool null_insert_enabled;
bool ulps;
bool core_power;
bool mmss_clamp;

3
drivers/video/fbdev/msm/mdss_dsi_host.c
View file

@ -1178,7 +1178,8 @@ static void mdss_dsi_mode_setup(struct mdss_panel_data *pdata)
}
/* DSI_COMMAND_MODE_NULL_INSERTION_CTRL */
if (ctrl_pdata->shared_data->hw_rev >= MDSS_DSI_HW_REV_104) {
if ((ctrl_pdata->shared_data->hw_rev >= MDSS_DSI_HW_REV_104)
&& ctrl_pdata->null_insert_enabled) {
data = (mipi->vc << 1); /* Virtual channel ID */
data |= 0 << 16; /* Word count of the NULL packet */
data |= 0x1; /* Enable Null insertion */