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drm/i915/pch: use intel_de_wait_custom() instead of wait_for_us()

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Prefer the register read specific wait function over i915 wait_for_us().

Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Link: https://lore.kernel.org/r/67e0afa2c0c5ad39b9108af15d0496394e674518.1753956266.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Jani Nikula
2025-07-31 13:05:13 +03:00
parent 6d13a797bb
commit 5a37f08d49
1 changed files with 10 additions and 4 deletions
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14
drivers/gpu/drm/i915/display/intel_pch_refclk.c
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@@ -17,16 +17,22 @@
static void lpt_fdi_reset_mphy(struct intel_display *display)
{
int ret;
intel_de_rmw(display, SOUTH_CHICKEN2, 0, FDI_MPHY_IOSFSB_RESET_CTL);
if (wait_for_us(intel_de_read(display, SOUTH_CHICKEN2) &
FDI_MPHY_IOSFSB_RESET_STATUS, 100))
ret = intel_de_wait_custom(display, SOUTH_CHICKEN2,
FDI_MPHY_IOSFSB_RESET_STATUS, FDI_MPHY_IOSFSB_RESET_STATUS,
100, 0, NULL);
if (ret)
drm_err(display->drm, "FDI mPHY reset assert timeout\n");
intel_de_rmw(display, SOUTH_CHICKEN2, FDI_MPHY_IOSFSB_RESET_CTL, 0);
if (wait_for_us((intel_de_read(display, SOUTH_CHICKEN2) &
FDI_MPHY_IOSFSB_RESET_STATUS) == 0, 100))
ret = intel_de_wait_custom(display, SOUTH_CHICKEN2,
FDI_MPHY_IOSFSB_RESET_STATUS, 0,
100, 0, NULL);
if (ret)
drm_err(display->drm, "FDI mPHY reset de-assert timeout\n");
}