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Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0635-drm-amd-display-Set-i2c-speed-to-100khz-for-DCE11.2-.patch')
-rw-r--r--meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0635-drm-amd-display-Set-i2c-speed-to-100khz-for-DCE11.2-.patch47
1 files changed, 47 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0635-drm-amd-display-Set-i2c-speed-to-100khz-for-DCE11.2-.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0635-drm-amd-display-Set-i2c-speed-to-100khz-for-DCE11.2-.patch
new file mode 100644
index 00000000..11697291
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0635-drm-amd-display-Set-i2c-speed-to-100khz-for-DCE11.2-.patch
@@ -0,0 +1,47 @@
+From 1d13151af1f0bdcb4c9f70165bd5da1c44742995 Mon Sep 17 00:00:00 2001
+From: Zeyu Fan <Zeyu.Fan@amd.com>
+Date: Wed, 19 Jul 2017 16:46:42 -0400
+Subject: [PATCH 0635/4131] drm/amd/display: Set i2c speed to 100khz for
+ DCE11.2 and later.
+
+Signed-off-by: Zeyu Fan <Zeyu.Fan@amd.com>
+Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
+Acked-by: Harry Wentland <Harry.Wentland@amd.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c | 12 ++++++++++--
+ 1 file changed, 10 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c b/drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c
+index 983645b..45e766e 100644
+--- a/drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c
++++ b/drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c
+@@ -337,6 +337,9 @@ enum {
+ DEFAULT_I2C_SW_SPEED = 50,
+ DEFAULT_I2C_HW_SPEED = 50,
+
++ DEFAULT_I2C_SW_SPEED_100KHZ = 100,
++ DEFAULT_I2C_HW_SPEED_100KHZ = 100,
++
+ /* This is the timeout as defined in DP 1.2a,
+ * 2.3.4 "Detailed uPacket TX AUX CH State Description". */
+ AUX_TIMEOUT_PERIOD = 400,
+@@ -436,8 +439,13 @@ bool dal_i2caux_construct(
+ i2caux->aux_timeout_period =
+ SW_AUX_TIMEOUT_PERIOD_MULTIPLIER * AUX_TIMEOUT_PERIOD;
+
+- i2caux->default_i2c_sw_speed = DEFAULT_I2C_SW_SPEED;
+- i2caux->default_i2c_hw_speed = DEFAULT_I2C_HW_SPEED;
++ if (ctx->dce_version >= DCE_VERSION_11_2) {
++ i2caux->default_i2c_hw_speed = DEFAULT_I2C_HW_SPEED_100KHZ;
++ i2caux->default_i2c_sw_speed = DEFAULT_I2C_SW_SPEED_100KHZ;
++ } else {
++ i2caux->default_i2c_hw_speed = DEFAULT_I2C_HW_SPEED;
++ i2caux->default_i2c_sw_speed = DEFAULT_I2C_SW_SPEED;
++ }
+
+ return true;
+ }
+--
+2.7.4
+