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From 4d34a58edc0089162f42475b4d3c6f428cc7cd3c Mon Sep 17 00:00:00 2001
From: Roman Li <roman.li@amd.com>
Date: Thu, 29 Mar 2018 11:14:25 -0400
Subject: [PATCH 4013/4131] drm/amd/display: Fix FBC text console corruption
Signed-off-by: Roman Li <roman.li@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
---
.../drm/amd/display/dc/dce110/dce110_compressor.c | 67 +++++++++++++++++-----
1 file changed, 54 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c
index 775d3bf..9150d26 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c
@@ -102,6 +102,43 @@ static uint32_t align_to_chunks_number_per_line(uint32_t pixels)
return 256 * ((pixels + 255) / 256);
}
+static void reset_lb_on_vblank(struct dc_context *ctx)
+{
+ uint32_t value, frame_count;
+ uint32_t retry = 0;
+ uint32_t status_pos =
+ dm_read_reg(ctx, mmCRTC_STATUS_POSITION);
+
+
+ /* Only if CRTC is enabled and counter is moving we wait for one frame. */
+ if (status_pos != dm_read_reg(ctx, mmCRTC_STATUS_POSITION)) {
+ /* Resetting LB on VBlank */
+ value = dm_read_reg(ctx, mmLB_SYNC_RESET_SEL);
+ set_reg_field_value(value, 3, LB_SYNC_RESET_SEL, LB_SYNC_RESET_SEL);
+ set_reg_field_value(value, 1, LB_SYNC_RESET_SEL, LB_SYNC_RESET_SEL2);
+ dm_write_reg(ctx, mmLB_SYNC_RESET_SEL, value);
+
+ frame_count = dm_read_reg(ctx, mmCRTC_STATUS_FRAME_COUNT);
+
+
+ for (retry = 100; retry > 0; retry--) {
+ if (frame_count != dm_read_reg(ctx, mmCRTC_STATUS_FRAME_COUNT))
+ break;
+ msleep(1);
+ }
+ if (!retry)
+ dm_error("Frame count did not increase for 100ms.\n");
+
+ /* Resetting LB on VBlank */
+ value = dm_read_reg(ctx, mmLB_SYNC_RESET_SEL);
+ set_reg_field_value(value, 2, LB_SYNC_RESET_SEL, LB_SYNC_RESET_SEL);
+ set_reg_field_value(value, 0, LB_SYNC_RESET_SEL, LB_SYNC_RESET_SEL2);
+ dm_write_reg(ctx, mmLB_SYNC_RESET_SEL, value);
+
+ }
+
+}
+
static void wait_for_fbc_state_changed(
struct dce110_compressor *cp110,
bool enabled)
@@ -232,19 +269,23 @@ void dce110_compressor_disable_fbc(struct compressor *compressor)
{
struct dce110_compressor *cp110 = TO_DCE110_COMPRESSOR(compressor);
- if (compressor->options.bits.FBC_SUPPORT &&
- dce110_compressor_is_fbc_enabled_in_hw(compressor, NULL)) {
- uint32_t reg_data;
- /* Turn off compression */
- reg_data = dm_read_reg(compressor->ctx, mmFBC_CNTL);
- set_reg_field_value(reg_data, 0, FBC_CNTL, FBC_GRPH_COMP_EN);
- dm_write_reg(compressor->ctx, mmFBC_CNTL, reg_data);
-
- /* Reset enum controller_id to undefined */
- compressor->attached_inst = 0;
- compressor->is_enabled = false;
-
- wait_for_fbc_state_changed(cp110, false);
+ if (compressor->options.bits.FBC_SUPPORT) {
+ if (dce110_compressor_is_fbc_enabled_in_hw(compressor, NULL)) {
+ uint32_t reg_data;
+ /* Turn off compression */
+ reg_data = dm_read_reg(compressor->ctx, mmFBC_CNTL);
+ set_reg_field_value(reg_data, 0, FBC_CNTL, FBC_GRPH_COMP_EN);
+ dm_write_reg(compressor->ctx, mmFBC_CNTL, reg_data);
+
+ /* Reset enum controller_id to undefined */
+ compressor->attached_inst = 0;
+ compressor->is_enabled = false;
+
+ wait_for_fbc_state_changed(cp110, false);
+ }
+
+ /* Sync line buffer - dce100/110 only*/
+ reset_lb_on_vblank(compressor->ctx);
}
}
--
2.7.4
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