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drm/i915/ddi: Optimize mtl_port_buf_ctl_program

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A small optimization and cleanup for mtl_port_buf_ctl_program function
which lets use intel_de_rmw instead of a intel_de_read and
intel_de_write.

Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250103051705.145161-3-suraj.kandpal@intel.com
This commit is contained in:
Suraj Kandpal 2025-01-03 10:47:05 +05:30
parent 2fcde2fbec
commit 173876aa5d
1 changed files with 4 additions and 5 deletions
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9
drivers/gpu/drm/i915/display/intel_ddi.c
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@ -2537,13 +2537,10 @@ static void mtl_port_buf_ctl_program(struct intel_encoder *encoder,
struct intel_display *display = to_intel_display(encoder);
struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
enum port port = encoder->port;
u32 val;
u32 val = 0;
val = intel_de_read(display, XELPDP_PORT_BUF_CTL1(i915, port));
val &= ~XELPDP_PORT_WIDTH_MASK;
val |= XELPDP_PORT_WIDTH(mtl_get_port_width(crtc_state->lane_count));
val &= ~XELPDP_PORT_BUF_PORT_DATA_WIDTH_MASK;
if (intel_dp_is_uhbr(crtc_state))
val |= XELPDP_PORT_BUF_PORT_DATA_40BIT;
else
@ -2552,7 +2549,9 @@ static void mtl_port_buf_ctl_program(struct intel_encoder *encoder,
if (dig_port->lane_reversal)
val |= XELPDP_PORT_REVERSAL;
intel_de_write(display, XELPDP_PORT_BUF_CTL1(display, port), val);
intel_de_rmw(display, XELPDP_PORT_BUF_CTL1(display, port),
XELPDP_PORT_WIDTH_MASK | XELPDP_PORT_BUF_PORT_DATA_WIDTH_MASK,
val);
}
static void mtl_port_buf_ctl_io_selection(struct intel_encoder *encoder)