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drm: etnaviv: flush all GPU caches when stopping GPU 

Flush the GPU caches to ensure that any dirty data is pushed out before
stopping the front end.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
This commit is contained in:
Russell King 2016-01-21 15:20:25 +00:00 committed by Lucas Stach
parent f60863116b
commit 8581d81497
2 changed files with 44 additions and 4 deletions
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39
drivers/gpu/drm/etnaviv/etnaviv_buffer.c
View File

@ -21,6 +21,7 @@
#include "common.xml.h"
#include "state.xml.h"
#include "state_3d.xml.h"
#include "cmdstream.xml.h"
/*
@ -179,12 +180,42 @@ u16 etnaviv_buffer_init(struct etnaviv_gpu *gpu)
void etnaviv_buffer_end(struct etnaviv_gpu *gpu)
{
struct etnaviv_cmdbuf *buffer = gpu->buffer;
unsigned int waitlink_offset = buffer->user_size - 16;
u32 link_target, flush = 0;
/* Replace the last WAIT with an END */
buffer->user_size -= 16;
if (gpu->exec_state == ETNA_PIPE_2D)
flush = VIVS_GL_FLUSH_CACHE_PE2D;
else if (gpu->exec_state == ETNA_PIPE_3D)
flush = VIVS_GL_FLUSH_CACHE_DEPTH |
VIVS_GL_FLUSH_CACHE_COLOR |
VIVS_GL_FLUSH_CACHE_TEXTURE |
VIVS_GL_FLUSH_CACHE_TEXTUREVS |
VIVS_GL_FLUSH_CACHE_SHADER_L2;
CMD_END(buffer);
mb();
if (flush) {
unsigned int dwords = 7;
link_target = etnaviv_buffer_reserve(gpu, buffer, dwords);
CMD_SEM(buffer, SYNC_RECIPIENT_FE, SYNC_RECIPIENT_PE);
CMD_STALL(buffer, SYNC_RECIPIENT_FE, SYNC_RECIPIENT_PE);
CMD_LOAD_STATE(buffer, VIVS_GL_FLUSH_CACHE, flush);
if (gpu->exec_state == ETNA_PIPE_3D)
CMD_LOAD_STATE(buffer, VIVS_TS_FLUSH_CACHE,
VIVS_TS_FLUSH_CACHE_FLUSH);
CMD_SEM(buffer, SYNC_RECIPIENT_FE, SYNC_RECIPIENT_PE);
CMD_STALL(buffer, SYNC_RECIPIENT_FE, SYNC_RECIPIENT_PE);
CMD_END(buffer);
etnaviv_buffer_replace_wait(buffer, waitlink_offset,
VIV_FE_LINK_HEADER_OP_LINK |
VIV_FE_LINK_HEADER_PREFETCH(dwords),
link_target);
} else {
/* Replace the last link-wait with an "END" command */
etnaviv_buffer_replace_wait(buffer, waitlink_offset,
VIV_FE_END_HEADER_OP_END, 0);
}
}
void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event,

9
drivers/gpu/drm/etnaviv/state_3d.xml.h Normal file
View File

@ -0,0 +1,9 @@
#ifndef STATE_3D_XML
#define STATE_3D_XML
/* This is a cut-down version of the state_3d.xml.h file */
#define VIVS_TS_FLUSH_CACHE 0x00001650
#define VIVS_TS_FLUSH_CACHE_FLUSH 0x00000001
#endif /* STATE_3D_XML */