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drm/etnaviv: Add module parameter to force PPU flop reset

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v2: Check for feature PIPE_3D when forcing PPU flop reset (Lucas)

v3: - drop use of ppu_flop_reset enum (Christian Gmeiner)
    - don't initialize module parameter to zero (checkpatch)
    - avoid multi-line string in warning message (checkpatch)

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Christian Gmeiner <cgmeiner@igalia.com>
Tested-by: Marek Vasut <marek.vasut@mailbox.org> # STM32MP255C DHCOS DHSBC
Link: https://patch.msgid.link/20251119164624.9297-6-gert.wollny@collabora.com
Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com>
This commit is contained in:
Gert Wollny 2025-11-19 17:45:51 +01:00 committed by Christian Gmeiner
parent 85ba57ad88
commit 6a0b99e9fb
1 changed files with 16 additions and 0 deletions
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16
drivers/gpu/drm/etnaviv/etnaviv_flop_reset.c
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@ -15,6 +15,9 @@
#include "etnaviv_flop_reset.h"
static int etnaviv_force_flop_reset;
module_param_named(force_flop_reset, etnaviv_force_flop_reset, int, 0);
#define PPU_IMAGE_STRIDE 64
#define PPU_IMAGE_XSIZE 64
#define PPU_IMAGE_YSIZE 6
@ -150,6 +153,19 @@ bool etnaviv_flop_reset_ppu_require(const struct etnaviv_chip_identity *chip_id)
return true;
}
if (etnaviv_force_flop_reset) {
if (!(chip_id->features & chipFeatures_PIPE_3D)) {
pr_warn("Etnaviv: model: 0x%04x, revision: 0x%04x does not support PIPE_3D\n",
chip_id->model, chip_id->revision);
pr_warn("Request to force PPU flop reset ignored.\n");
return false;
}
pr_info("Force PPU flop reset for model: 0x%04x, revision: 0x%04x\n",
chip_id->model, chip_id->revision);
return true;
}
return false;
}