gpu: nvgpu: gp106: Program RX bias current

Hard code RX bias current to 0x2.

Bug 1833830

Change-Id: I1107bad52de7b38d311bc5795739777a4bb4239a
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1253656
(cherry picked from commit 7e853b0c62043cc53847e3535e05886d574dc779)
Reviewed-on: http://git-master/r/1255724
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit

2 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/clk/clk_mclk.c b/drivers/gpu/nvgpu/clk/clk_mclk.c
index ea238c15..86f4ff6d 100644
--- a/drivers/gpu/nvgpu/clk/clk_mclk.c
+++ b/drivers/gpu/nvgpu/clk/clk_mclk.c
@@ -2189,6 +2189,9 @@ int clk_mclkseq_init_mclk_gddr5(struct gk20a *g)
 
         mutex_init(&mclk->mclk_mutex);
 
+        /* FBPA gain WAR */
+        gk20a_writel(g, fb_fbpa_fbio_iref_byte_rx_ctrl_r(), 0x22222222);
+
         mclk->speed = gk20a_mclk_low_speed; /* Value from Devinit */
 
         /* Parse VBIOS */
diff --git a/drivers/gpu/nvgpu/gp106/hw_fb_gp106.h b/drivers/gpu/nvgpu/gp106/hw_fb_gp106.h
index 19d88464..519679f5 100644
--- a/drivers/gpu/nvgpu/gp106/hw_fb_gp106.h
+++ b/drivers/gpu/nvgpu/gp106/hw_fb_gp106.h
@@ -602,4 +602,8 @@ static inline u32 fb_niso_scrub_status_flag_v(u32 r)
 {
         return (r >> 0) & 0x1;
 }
+static inline u32 fb_fbpa_fbio_iref_byte_rx_ctrl_r(void)
+{
+        return 0x009a0eb0;
+}
 #endif